2001 SAN DIEGO, CALIFORNIA (SAN)



The city of San Diego is located on San Diego Bay in the southwest corner of southern California. The prevailing winds and weather are tempered by the Pacific Ocean, with the result that summers are cool and winters warm in comparison with other places along the same general latitude. Temperatures of freezing or below have rarely occurred at the station since the record began in 1871, but hot weather, 90 degrees or above, is more frequent.

Dry easterly winds sometimes blow in the vicinity for several days at a time, bringing temperatures in the 90s and at times even in the 100s in the eastern sections of the city and outlying suburbs. At the National Weather Service station itself, however, there have been relatively few days on which 100 degrees or higher was reached.

As these hot winds are predominant in the fall, highest temperatures occur in the months of September and October. Records show that over 60 percent of the days with 90 degrees or higher have occurred in these two months. High temperatures are almost invariably accompanied by very low relative humidities, which often drop below 20 percent and occasionally below 10 percent.

A marked feature of the climate is the wide variation in temperature within short distances. In nearby valleys daytimes are much warmer in summer and nights noticeably cooler in winter, and freezing occurs much more frequently than in the city. Although records show unusually small daily temperature ranges, only about 15 degrees between the highest and lowest readings, a few miles inland these ranges increase to 30 degrees or more.

Strong winds and gales associated with Pacific, or tropical storms, are infrequent due to the latitude.

The seasonal rainfall is about 10 inches in the city, but increases with elevation and distance from the coast. In the mountains to the north and east the average is between 20 and 40 inches, depending on slope and elevation. Most of the precipitation falls in winter, except in the mountains where there is an occasional thunderstorm. Eighty–five percent of the rainfall occurs from November through March, but wide variations take place in monthly and seasonal totals. Infrequent measurable amounts of hail occur in San Diego, but snow is practically unknown at the Weather Service Office location. In each occurrence of snowfall only a trace was recorded officially, but in some locations amounts up to or slightly exceeding a half–inch fell, and remained on the ground for an hour or more.

As on the rest of the Pacific Coast, a dominant characteristic of spring and summer is the nighttime and early morning cloudiness. Low clouds form regularly and frequently extend inland over the coastal valleys and foothills, but they usually dissipate during the morning and the afternoons are generally clear.

Considerable fog occurs along the coast, but the amount decreases with distance inland. The fall and winter months are usually the foggiest. Thunderstorms are rare, averaging about three a year in the city. Visibilities are good as a rule. The sunshine is plentiful for a marine location, with a marked increase toward the interior.

NORMALS, MEANS, AND EXTREMES

SAN DIEGO, CA (SAN)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 23188

32 44′ 05″ N  117 10′ 07″ W  GRND: 78 BARO: 81  PACIFIC (UTC + 8)

2001 San Diego, California (SAN)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 65.9 66.5 66.3 68.4 69.1 71.6 76.2 77.8 77.1 74.6 69.9 66.1 70.8
MEAN DAILY MAXIMUM 54 65.3 66.0 66.3 68.2 69.2 71.7 75.6 77.3 76.8 74.0 70.1 66.2 70.6
HIGHEST DAILY MAXIMUM 61 88 90 93 98 96 101 95 98 111 107 97 88 111
YEAR OF OCCURRENCE 1953 1995 1988 1989 1953 1979 1985 1955 1963 1961 1976 1963 SEP 1963
MEAN OF EXTREME MAXS. 54 78.3 78.5 79.0 81.2 78.9 81.4 83.3 85.8 90.3 88.4 83.1 78.2 82.2
NORMAL DAILY MINIMUM 30 48.9 50.7 52.8 55.6 59.1 61.9 65.7 67.3 65.6 60.9 53.9 48.8 57.6
MEAN DAILY MINIMUM 54 48.5 50.2 52.2 55.3 58.6 61.4 65.1 66.4 64.9 60.2 53.3 48.6 57.1
LOWEST DAILY MINIMUM 61 29 36 39 41 48 51 55 57 51 43 38 34 29
YEAR OF OCCURRENCE 1949 1949 1971 1945 1967 1967 1948 1944 1948 1971 1964 1987 JAN 1949
MEAN OF EXTREME MINS. 54 40.4 43.4 45.5 49.2 53.3 57.4 61.3 62.5 59.2 52.8 45.3 40.9 50.9
NORMAL DRY BULB 30 57.4 58.6 59.6 62.0 64.1 66.8 71.0 72.6 71.4 67.7 62.0 57.4 64.2
MEAN DRY BULB 54 56.8 58.0 59.2 61.7 63.9 66.5 70.5 71.9 70.9 67.1 61.8 57.5 63.8
MEAN WET BULB 18 51.3 52.5 54.2 56.3 58.8 61.2 64.5 66.1 65.0 61.1 54.8 50.4 58.0
MEAN DEW POINT 18 44.9 46.8 49.1 51.5 55.1 58.0 61.7 63.2 61.8 56.9 48.8 43.4 53.4
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.0 0.0 0.1 0.2 0.1 0.5 0.3 0.2 1.4 0.9 0.2 0.0 3.9
MAXIMUM 32 30 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
MINIMUM 32 30 * 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
MINIMUM 0 30 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
H/C NORMAL HEATING DEG. DAYS 30 245 189 177 113 73 51 13 0 19 24 109 243 1256
NORMAL COOLING DEG. DAYS 30 9 10 9 23 45 105 199 240 211 107 19 7 984
RH NORMAL (PERCENT) 30 63 66 67 67 71 74 75 74 73 69 66 64 69
HOUR 04 LST 30 70 73 75 75 77 81 82 81 80 76 73 70 76
HOUR 10 LST 30 55 58 60 60 65 69 69 68 66 61 56 54 62
HOUR 16 LST 30 56 58 59 59 64 66 66 66 65 63 61 58 62
HOUR 22 LST 30 70 72 72 72 75 78 80 79 78 75 73 71 75
S PERCENT POSSIBLE SUNSHINE 56 72 71 70 68 59 58 68 70 69 68 75 73 68
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 61 2.9 2.5 1.5 1.1 0.6 0.6 0.6 0.6 2.2 3.1 3.4 3.9 23.0
THUNDERSTORMS 61 0.2 0.3 0.4 0.2 0.1 0.1 0.2 0.3 0.3 0.3 0.3 0.4 3.1
CLOUDINESS MEAN:
SUNRISE–SUNSET (OKTAS) 56 4.1 4.2 4.2 4.2 4.6 4.4 3.6 3.2 3.2 3.5 3.3 3.7 3.9
MIDNIGHT–MIDNIGHT (OKTAS) 32 3.9 4.4 4.5 4.1 5.1 5.0 4.3 4.0 4.0 3.8 3.4 3.5 4.2
MEAN NO. DAYS WITH:
CLEAR 56 12.3 10.1 10.8 10.3 8.5 9.3 12.7 15.1 15.0 13.7 14.7 13.6 146.1
PARTLY CLOUDY 56 7.6 7.6 9.5 10.0 11.3 11.8 12.8 11.5 9.5 9.7 8.0 7.7 117.0
CLOUDY 56 11.1 10.5 10.7 9.7 11.2 9.0 5.0 4.4 5.5 7.6 7.3 9.6 101.6
PR MEAN STATION PRESSURE(IN) 29 30.04 30.03 29.98 29.96 29.92 29.89 29.90 29.89 29.87 29.93 30.00 30.03 29.95
MEAN SEA–LEVEL PRES. (IN) 18 30.06 30.06 30.02 29.97 29.95 29.92 29.93 29.92 29.90 29.95 30.03 30.07 29.98
WINDS MEAN SPEED (MPH) 38 6.0 6.6 7.4 7.8 7.8 7.8 7.6 7.5 7.2 6.6 6.0 5.6 7.0
PREVAIL. DIR (TENS OF DEGS) 23 30 30 30 30 30 30 30 30 30 30 30 30 30
MAXIMUM 2–MINUTE:
SPEED (MPH) 5 31 38 38 32 26 23 20 20 21 23 26 34 38
DIR. (TENS OF DEGS) 14 17 25 26 17 25 28 29 14 29 13 04 25
YEAR OF OCCURRENCE 2001 1998 2000 1999 1998 2000 1999 1997 2001 1997 1998 1997 MAR 2000
MAXIMUM 5–SECOND:
SPEED (MPH) 5 37 46 45 37 32 25 23 23 24 28 34 43 46
DIR. (TENS OF DEGS) 14 14 25 25 18 24 27 28 33 29 19 05 14
YEAR OF OCCURRENCE 2001 2001 2000 1999 1998 2000 1997 2000 1997 1997 1998 1997 FEB 2001
PRECIPITATION NORMAL (IN) 30 1.80 1.53 1.77 0.79 0.19 0.07 0.02 0.10 0.24 0.37 1.45 1.57 9.90
MAXIMUM MONTHLY (IN) 61 9.09 7.65 6.96 3.71 1.79 0.87 0.24 2.13 1.90 2.90 5.82 7.60 9.09
YEAR OF OCCURRENCE 1993 1998 1991 1988 1977 1990 1991 1977 1963 1941 1965 1943 JAN 1993
MINIMUM MONTHLY (IN) 61 T 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00
YEAR OF OCCURRENCE 1976 1967 1997 1993 1952 1981 1982 1981 1979 1967 1980 2000 MAR 1997
MAXIMUM IN 24 HOURS (IN) 61 2.65 2.61 2.40 1.98 1.50 0.82 0.23 2.13 1.00 1.39 2.44 3.07 3.07
YEAR OF OCCURRENCE 1978 1979 1952 1988 1977 1990 1991 2013 1986 1986 1944 1945 DEC 1945
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 6.3 5.3 6.6 4.3 2.2 1.1 0.5 0.6 1.5 2.3 5.0 5.5 41.2
PRECIPITATION 1.00 30 0.3 0.2 0.3 0.1 * 0.0 0.0 * 0.0 0.0 0.3 0.3 1.5
SNOWFALL NORMAL (IN) 30 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.0
MAXIMUM MONTHLY (IN) 59 T 0.0 T T 0.0 0.0 0.0 0.0 0.0 0.0 T T T
YEAR OF OCCURRENCE 1949 1985 1999 1985 1967 APR 1999
MAXIMUM IN 24 HOURS (IN) 59 T 0.0 T T 0.0 0.0 0.0 0.0 0.0 0.0 T T T
YEAR OF OCCURRENCE 1949 1985 1999 1985 1967 APR 1999
MAXIMUM SNOW DEPTH (IN) 51 0 0 0 0 0 0 0 0 0 0 0 0 0
YEAR OF OCCURRENCE
NORMAL NO. DAYS WITH:
SNOWFALL 1.0 30 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2001 San Diego, California (SAN)

PRECIPITATION (inches) 2001 SAN DIEGO, CA (SAN)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.07 0.10 T 0.02 0.10 0.38 T 0.02 0.44 0.58 3.16 1.61 6.48
1973 1.68 1.63 2.26 0.05 T T T T 0.02 0.01 1.63 0.19 7.47
1974 2.96 0.04 1.70 0.02 0.01 0.02 0.01 T T 1.03 0.14 2.20 8.13
1975 0.49 0.96 3.79 2.00 0.01 0.02 T T T 0.09 0.64 0.37 8.37
1976 T 5.40 0.99 1.33 0.27 0.02 0.02 0.01 1.00 0.38 0.75 1.06 11.23
1977 2.36 0.06 0.61 0.01 1.79 0.03 T 2.13 T 0.50 0.05 1.67 9.21
1978 5.95 2.64 5.00 0.73 0.04 T 0.00 T 0.72 0.05 2.09 2.19 19.41
1979 5.82 0.85 3.71 0.02 0.09 0.01 0.09 0.01 0.00 0.73 0.27 0.02 11.62
1980 5.58 4.47 2.71 1.18 0.65 0.01 T 0.00 T 0.05 0.00 0.31 14.96
1981 1.48 2.26 3.74 0.22 0.04 0.00 T 0.00 0.03 0.14 1.79 0.54 10.24
1982 2.71 0.88 4.74 0.62 0.01 0.04 0.00 T 0.38 0.05 2.10 1.43 12.96
1983 2.10 3.88 6.57 1.74 0.01 T 0.01 0.39 0.21 0.40 1.94 1.53 18.78
1984 0.46 0.09 0.04 0.62 0.00 0.04 0.19 0.06 T 0.29 2.37 4.55 8.71
1985 0.52 0.77 0.58 0.32 T T 0.00 T 0.20 0.29 4.92 1.06 8.66
1986 0.75 2.59 3.12 1.17 0.00 T 0.01 0.00 1.04 1.39 1.16 0.95 12.18
1987 1.68 1.53 1.04 0.78 0.03 T 0.03 0.01 0.70 1.74 1.33 2.73 11.60
1988 0.89 1.37 0.59 3.71 0.08 0.00 T T T T 1.39 2.23 10.26
1989 0.42 0.70 0.69 0.12 0.04 0.06 0.00 T 0.23 0.47 0.09 1.01 3.83
1990 2.52 1.13 0.25 0.76 0.51 0.87 T 0.01 T T 0.65 0.59 7.29
1991 1.06 2.46 6.96 0.05 0.01 T 0.24 0.01 0.28 0.69 0.05 1.70 13.51
1992 1.81 3.34 4.42 0.28 0.07 0.04 0.03 0.05 0.00 0.18 0.03 2.56 12.81
1993 9.09 4.73 1.22 0.00 0.01 0.41 0.03 T T 0.22 0.77 0.78 17.26
1994 0.70 2.75 3.67 0.93 0.07 T 0.03 0.01 T 0.01 0.46 0.80 9.43
1995 8.06 1.93 3.81 0.96 0.59 0.46 0.05 0.00 T T 0.30 0.88 17.04
1996 1.52 0.88 1.10 0.36 0.02 0.00 0.09 T 0.03 0.94 1.70 0.63 7.27
1997 3.02 0.31 0.00 0.28 T T T 0.00 0.85 0.02 1.17 1.35 7.00
1998 2.68 7.65 2.21 1.11 0.64 0.10 0.20 T 0.03 0.08 0.69 0.66 16.05
1999 1.54 0.70 1.09 1.62 0.06 0.04 T 0.00 0.02 0.00 0.04 0.32 5.43
2000 0.17 3.67 1.00 0.54 T T 0.00 0.01 T 1.24 0.26 0.01 6.90
2001 3.28 2.38 0.63 0.76 0.01 0.00 T 0.00 0.00 0.00 0.95 0.46 8.47
POR=152 YRS 2.19 1.72 1.90 0.79 0.19 0.08 0.03 0.08 0.19 0.35 1.14 1.34 10.00

2001 San Diego, California (SAN)

AVERAGE TEMPERATURE (F) 2001 SAN DIEGO, CA (SAN)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 54.9 57.8 60.2 62.3 64.7 67.0 72.7 72.2 68.7 65.6 59.8 57.5 63.6
1973 55.6 59.9 58.1 61.5 63.4 68.0 69.1 70.5 68.8 66.8 60.6 58.2 63.4
1974 56.9 58.2 59.1 62.0 63.3 66.9 71.4 70.2 70.3 66.8 62.2 56.3 63.6
1975 56.1 56.4 57.5 58.7 62.2 65.0 69.4 68.9 71.5 65.9 60.4 56.9 62.4
1976 58.9 59.6 60.3 61.0 65.2 69.7 71.1 72.4 73.8 71.2 66.8 60.7 65.9
1977 60.3 61.7 57.5 61.4 61.9 65.8 71.6 73.1 72.2 68.9 64.9 63.3 65.2
1978 61.0 60.9 64.3 63.4 68.2 71.3 71.6 72.9 74.0 70.1 61.7 55.2 66.2
1979 56.9 56.9 60.1 63.4 65.6 70.2 71.8 73.9 76.3 68.7 62.4 60.6 65.6
1980 61.1 63.5 61.5 63.9 63.8 68.5 72.9 74.2 70.4 67.3 62.7 60.8 65.9
1981 61.3 62.2 61.1 64.4 67.3 72.9 75.6 75.8 73.7 67.1 63.5 60.3 67.1
1982 56.6 60.7 60.5 63.8 65.8 66.7 71.9 73.5 73.1 70.1 62.1 57.4 65.2
1983 60.7 60.9 62.0 62.4 66.2 68.1 72.6 77.4 76.8 72.2 64.4 60.6 67.0
1984 61.2 60.2 63.7 64.3 68.1 69.9 77.2 76.6 78.9 68.5 61.4 56.7 67.2
1985 57.0 57.2 58.9 63.6 64.8 69.0 75.3 72.4 69.8 67.9 60.1 58.0 64.5
1986 61.0 58.9 60.5 62.8 64.6 67.4 69.6 71.8 66.9 65.5 62.8 57.6 64.1
1987 55.4 58.0 59.1 63.4 64.7 65.8 67.1 69.9 69.9 69.5 61.8 53.9 63.2
1988 56.7 59.9 61.6 62.4 63.9 64.9 70.4 71.0 70.0 66.7 60.1 56.0 63.6
1989 54.7 56.7 59.8 65.6 63.7 66.0 70.1 71.0 70.4 66.3 63.1 58.7 63.8
1990 56.6 55.2 58.7 63.2 64.3 69.0 72.3 71.6 71.7 68.6 62.7 55.6 64.1
1991 57.4 59.4 56.5 61.7 62.1 64.1 67.4 68.9 69.4 68.0 62.3 57.3 62.9
1992 57.4 61.1 60.4 67.0 68.0 68.1 71.8 74.9 72.4 68.2 62.6 55.3 65.6
1993 56.9 58.0 61.3 63.8 66.0 68.6 69.8 70.2 69.0 67.3 61.6 57.0 64.1
1994 57.9 56.5 60.4 61.0 62.1 68.1 69.5 74.0 72.5 66.8 56.4 55.8 63.4
1995 56.9 61.4 60.4 61.5 62.0 64.8 69.0 71.9 71.5 67.1 63.2 58.3 64.0
1996 57.6 58.8 60.1 64.6 66.8 67.8 70.0 72.8 70.6 64.3 61.6 57.8 64.4
1997 58.0 58.4 61.6 62.5 68.7 67.5 69.3 72.9 75.2 68.7 64.0 57.4 65.4
1998 58.2 57.3 59.3 59.6 62.8 65.7 68.8 72.8 70.3 65.7 59.7 55.4 63.0
1999 57.5 57.8 58.3 58.9 60.5 62.8 68.5 68.0 67.0 68.8 60.5 57.8 62.2
2000 58.2 59.0 58.1 62.4 64.6 68.2 69.2 72.0 70.5 65.1 58.4 58.1 63.7
2001 54.7 54.9 58.9 58.5 63.7 67.6 69.0 69.6 68.2 66.3 61.4 55.5 62.4
POR=127 YRS 55.6 56.6 58.0 60.3 62.5 65.2 68.8 70.2 69.0 65.2 60.8 57.0 62.4

REFERENCE NOTES:

PAGE 1:

THE TEMPERATURE GRAPH SHOWS NORMAL MAXIMUM AND NORMAL MINIMUM DAILY TEMPERATURES (SOLID CURVES) AND THE ACTUAL DAILY HIGH AND LOW TEMPERATURES (VERTICAL BARS).

PAGE 2 AND 3:

H/C INDICATES HEATING AND COOLING DEGREE DAYS.

RH INDICATES RELATIVE HUMIDITY

W/O INDICATES WEATHER AND OBSTRUCTIONS

S INDICATES SUNSHINE.

PR INDICATES PRESSURE.

CLOUDINESS ON PAGE 3 IS THE SUM OF THE CEILOMETER AND SATELLITE DATA NOT TO EXCEED EIGHT EIGHTHS (OKTAS).

GENERAL:

T INDICATES TRACE PRECIPITATION, AN AMOUNT GREATER THAN ZERO BUT LESS THAN THE LOWEST REPORTABLE VALUE.

+ INDICATES THE VALUE ALSO OCCURS ON EARLIER DATES.

BLANK ENTRIES DENOTE MISSING OR UNREPORTED DATA.

NORMALS ARE 30–YEAR AVERAGES (1961–1990).

ASOS INDICATES AUTOMATED SURFACE OBSERVING SYSTEM.

PM INDICATES THE LAST DAY OF THE PREVIOUS MONTH.

POR (PERIOD OF RECORD) BEGINS WITH THE JANUARY DATA MONTH AND IS THE NUMBER OF YEARS USED TO COMPUTE THE MEAN. INDIVIDUAL MONTHS WITHIN THE POR MAY BE MISSING.

WHEN THE POR FOR A NORMAL IS LESS THAN 30 YEARS, THE NORMAL IS PROVISIONAL AND IS BASED ON THE NUMBER OF YEARS INDICATED.

0.* OR * INDICATES THE VALUE OR MEAN–DAYS–WITH IS BETWEEN 0.00 AND 0.05.

CLOUDINESS FOR ASOS STATIONS DIFFERS FROM THE NON–ASOS OBSERVATION TAKEN BY A HUMAN OBSERVER. ASOS STATION CLOUDINESS IS BASED ON TIME–AVERAGED CEILOMETER DATA FOR CLOUDS AT OR BELOW 12,000 FEET AND ON SATELLITE DATA FOR CLOUDS ABOVE 12,000 FEET.

THE NUMBER OF DAYS WITH CLEAR, PARTLY CLOUDY, AND CLOUDY CONDITIONS FOR ASOS STATIONS IS THE SUM OF THE CEILOMETER AND SATELLITE DATA FOR THE SUNRISE TO SUNSET PERIOD.

GENERAL CONTINUED:

CLEAR INDICATES 0–2 OKTAS, PARTLY CLOUDY INDICATES 3–6 OKTAS, AND CLOUDY INDICATES 7 OR 8 OKTAS. WHEN AT LEAST ONE OF THE ELEMENTS (CEILOMETER OR SATELLITE) IS MISSING, THE DAILY CLOUDINESS IS NOT COMPUTED.

WIND DIRECTION IS RECORDED IN TENS OF DEGREES (2 DIGITS) CLOCKWISE FROM TRUE NORTH. "00" INDICATES CALM. "36" INDICATES TRUE NORTH.

RESULTANT WIND IS THE VECTOR AVERAGE OF THE SPEED AND DIRECTION.

AVERAGE TEMPERATURE IS THE SUM OF THE MEAN DAILY MAXIMUM AND MINIMUM TEMPERATURE DIVIDED BY 2.

SNOWFALL DATA COMPRISE ALL FORMS OF FROZEN PRECIPITATION, INCLUDING HAIL.

A HEATING (COOLING) DEGREE DAY IS THE DIFFERENCE BETWEEN THE AVERAGE DAILY TEMPERATURE AND 65 F.

DRY BULB IS THE TEMPERATURE OF THE AMBIENT AIR.

DEW POINT IS THE TEMPERATURE TO WHICH THE AIR MUST BE COOLED TO ACHIEVE 100 PERCENT RELATIVE HUMIDITY.

WET BULB IS THE TEMPERATURE THE AIR WOULD HAVE IF THE MOISTURE CONTENT WAS INCREASED TO 100 PERCENT RELATIVE HUMIDITY.

ON JULY 1, 1996, THE NATIONAL WEATHER SERVICE BEGAN USING THE "METAR" OBSERVATION CODE THAT WAS ALREADY EMPLOYED BY MOST OTHER NATIONS OF THE WORLD. THE MOST NOTICEABLE DIFFERENCE IN THIS ANNUAL PUBLICATION WILL BE THE CHANGE IN UNITS FROM TENTHS TO EIGHTS (OKTAS) FOR REPORTING THE AMOUNT OF SKY COVER.

2001 San Diego, California (SAN)

HEATING DEGREE DAYS (base 65 F) 2001 SAN DIEGO, CA (SAN)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0 0 0 29 149 224 286 131 208 107 61 1 1196
1973–74 0 0 0 6 132 205 243 184 176 85 55 4 1090
1974–75 0 0 0 14 97 265 273 237 225 182 83 10 1386
1975–76 0 0 0 19 141 246 196 150 148 115 16 0 1031
1976–77 0 0 0 0 39 129 143 94 224 103 88 3 823
1977–78 0 0 0 0 37 55 117 117 52 43 8 0 429
1978–79 0 0 0 0 102 297 244 219 153 45 20 6 1086
1979–80 0 0 0 4 75 136 117 50 104 61 43 1 591
1980–81 0 0 0 6 75 133 113 101 116 40 1 0 585
1981–82 0 0 0 9 57 136 258 119 139 64 9 2 793
1982–83 0 0 0 1 93 228 137 110 88 83 9 0 749
1983–84 0 0 0 0 66 130 123 134 51 43 4 0 551
1984–85 0 0 0 4 104 250 238 219 183 60 18 2 1078
1985–86 0 0 0 3 145 211 118 173 132 85 29 0 896
1986–87 0 0 7 10 66 223 291 197 178 72 21 6 1071
1987–88 0 0 0 0 98 338 250 147 125 85 53 22 1118
1988–89 0 0 0 4 141 275 313 237 158 37 40 14 1219
1989–90 0 0 1 13 67 188 252 268 185 52 39 1 1066
1990–91 0 0 0 3 88 284 227 152 254 104 96 28 1236
1991–92 0 0 0 24 96 231 228 115 136 8 1 0 839
1992–93 0 0 0 0 84 294 240 191 111 44 7 6 977
1993–94 0 0 0 4 103 242 214 235 147 116 85 1 1147
1994–95 0 0 0 12 249 276 242 106 136 105 87 24 1237
1995–96 0 0 0 3 49 200 223 171 146 54 6 0 852
1996–97 0 0 0 45 115 216 217 185 124 81 0 1 984
1997–98 0 0 0 2 65 227 203 208 172 155 69 9 1110
1998–99 1 0 0 13 152 293 224 198 200 189 132 64 1466
1999–00 4 0 3 3 130 217 212 171 206 82 23 0 1051
2000–01 0 0 0 27 191 208 314 281 183 191 39 5 1439
2001– 0 0 0 4 107 289

2001 San Diego, California (SAN)

COOLING DEGREE DAYS (base 65 F) 2001 SAN DIEGO, CA (SAN)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 0 0 4 33 68 247 230 117 53 0 1 753
1973 0 0 0 10 17 97 133 176 121 70 8 1 633
1974 0 0 0 2 9 69 204 169 164 75 19 0 711
1975 0 0 0 0 1 18 142 124 201 54 8 0 548
1976 14 0 10 3 31 147 196 240 269 200 102 0 1212
1977 5 9 0 2 1 34 212 258 224 128 40 8 921
1978 1 7 38 4 115 194 213 251 276 166 11 0 1276
1979 0 0 10 6 46 169 216 283 348 124 5 8 1215
1980 2 13 3 35 15 110 253 289 170 86 15 7 998
1981 7 29 0 26 81 244 335 343 265 80 21 0 1431
1982 0 7 6 32 42 58 219 271 250 164 12 0 1061
1983 11 0 1 9 51 99 242 392 364 231 55 0 1455
1984 13 0 15 31 107 156 387 366 422 119 4 0 1620
1985 0 7 0 22 19 128 325 235 153 104 6 0 999
1986 2 11 4 29 23 78 152 218 73 31 9 0 630
1987 0 6 5 29 17 35 71 158 154 147 10 0 632
1988 0 5 28 16 25 26 176 193 161 64 0 5 699
1989 0 13 2 63 5 48 165 193 168 58 17 0 732
1990 0 0 2 6 21 127 233 211 209 123 25 0 957
1991 0 0 0 9 11 10 80 130 138 122 21 0 521
1992 0 12 1 72 99 100 216 313 228 106 20 0 1167
1993 0 0 4 12 47 119 155 170 126 81 8 0 722
1994 0 0 10 3 1 100 146 289 231 76 0 0 856
1995 0 14 1 8 1 27 133 223 199 75 2 0 683
1996 0 0 4 53 70 92 164 251 175 30 19 0 858
1997 6 4 23 12 119 83 138 252 314 123 40 2 1116
1998 0 0 1 0 6 34 127 250 167 40 0 0 625
1999 0 0 0 14 0 5 118 100 69 126 3 0 435
2000 8 5 0 8 19 101 137 226 170 39 0 1 714
2001 0 3 2 5 4 90 132 149 102 53 4 0 544

2001 San Diego, California (SAN)

SNOWFALL (inches) 2001 SAN DIEGO, CA (SAN)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1973–74 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1974–75 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1975–76 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1976–77 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1977–78 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1978–79 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1979–80 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1980–81 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1981–82 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1982–83 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1983–84 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1984–85 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.0 0.0 0.0 T
1985–86 0.0 0.0 0.0 0.0 T 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T
1986–87 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1987–88 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1988–89 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1989–90 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1990–91 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1991–92 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1992–93 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1993–94 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1994–95 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1995–96 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
1996–97 0.0
1997–98 0.0 0.0 0.0 0.0 0.0 T 0.0 0.0 0.0
1998–99 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.0 0.0 T
1999–00 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
2000–01
2001–
POR=57 YRS 0.0 0.0 0.0 0.0 T T T 0.0 T 0.0 0.0 0.0 T



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2001 San Diego, California (SAN) forum