2001 LOS ANGELES, CALIFORNIA Downtown L.A./USC Campus (CQT)



The climate of Los Angeles is normally pleasant and mild through the year. The Pacific Ocean is the primary moderating influence. The coastal mountain ranges lying along the north and east sides of the Los Angeles coastal basin act as a buffer against extremes of summer heat and winter cold occurring in desert and plateau regions in the interior. A variable balance between mild sea breezes, and either hot or cold winds from the interior, results in some variety in weather conditions, but temperature and humidity are usually well within the limits of human comfort. An important, and somewhat unusual, aspect of the climate of the Los Angeles metropolitan area is the pronounced difference in temperature, humidity, cloudiness, fog, rain, and sunshine over fairly short distances.

These differences are closely related to the distance from, and elevation above, the Pacific Ocean. Both high and low temperatures become more extreme and the average relative humidity becomes lower as one goes inland and up foothill slopes. Relative humidity is frequently high near the coast, but may be quite low along the foothills. During periods of high temperatures, the relative humidity is usually below normal so that discomfort is rare, except for infrequent periods when high temperatures and high humidities occur together.

Like other Pacific Coast areas, most rainfall comes during the winter with nearly 85 percent of the annual total occurring from November through March, while summers are practically rainless. As in many semi–arid regions, there is a marked variability in monthly and seasonal totals. Precipitation generally increases with distance from the ocean, from a yearly total of around 12 inches in coastal sections to the south of the city to over 20 inches in foothill areas. Destructive flash floods occasionally develop in and below some mountain canyons. Snow is often visible on nearby mountains in the winter, but is extremely rare in the coastal basin. Thunderstorms are infrequent.

Prevailing winds are from the west during the spring, summer, and early autumn, with northeasterly wind predominating the remainder of the year. At times, the lack of air movement, combined with a frequent and persistent temperature inversion, is associated with concentrations of air pollution in the Los Angeles coastal basin and some adjacent areas. In fall, winter, and early spring months, occasional foehn–like descending Santa Ana winds come from the northeast over ridges and through passes in the coastal mountains. These Santa Ana winds may pick up considerable amounts of dust and reach speeds of 35 to 50 mph in north and east sections of the city, with higher speeds in outlying areas to the north and east, but rarely reach coastal portions of the city.

Sunshine, fog, and clouds depend a great deal on topography and distance from the ocean. Low clouds are common at night and in the morning along the coast during spring and summer, but form later and clear earlier near the foothills so that annual cloudiness and fog frequencies are greatest near the ocean, and sunshine totals are highest on the inland side of the city. The sun shines about 75 percent of daytime hours at the Civic Center. Light fog may accompany the usual night and morning low clouds, but dense fog is more likely to occur during the night and early morning hours of the winter months.

NORMALS, MEANS, AND EXTREMES

LOS ANGELES, CA (CQT)

LATITUDE:    LONGITUDE:     ELEVATION (FT):    TIME ZONE:    WBAN: 93134

34 01′ 40″ N  118 17′ 45″ W  GRND: 182  BARO: 185  PACIFIC (UTC + 8)

2001 Los Angeles, California downtown L.A./USC Campus (CQT)

ELEMENT POR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
TEMPERATURE F NORMAL DAILY MAXIMUM 30 67.7 69.4 69.5 72.3 73.9 78.3 84.0 84.5 82.7 79.0 72.4 67.8 75.1
MEAN DAILY MAXIMUM 81 66.5 67.6 68.7 71.2 73.4 77.2 82.7 83.5 82.1 77.8 73.2 67.7 74.3
HIGHEST DAILY MAXIMUM 61 95 95 98 106 102 112 107 105 110 108 100 91 112
YEAR OF OCCURRENCE 1971 1995 1988 1989 1967 1990 1985 1983 1988 1987 1966 1979 JUN 1990
MEAN OF EXTREME MAXS. 81 80.9 82.4 84.0 87.9 89.0 89.9 93.0 94.2 96.7 94.4 87.5 81.7 88.5
NORMAL DAILY MINIMUM 30 48.9 50.6 51.8 54.2 57.7 61.1 64.5 65.7 64.6 60.3 53.5 48.8 56.8
MEAN DAILY MINIMUM 81 48.4 49.9 51.1 53.7 56.8 59.8 63.3 64.3 63.0 59.0 53.5 49.5 56.0
LOWEST DAILY MINIMUM 61 28 34 35 39 46 49 54 53 51 41 38 30 28
YEAR OF OCCURRENCE 1949 1989 1976 1975 1964 1999 1952 1943 1948 1971 1978 1978 JAN 1949
MEAN OF EXTREME MINS. 81 39.9 42.3 43.8 46.8 51.2 54.7 58.8 59.8 57.2 52.0 45.1 40.9 49.4
NORMAL DRY BULB 30 58.3 60.1 60.7 63.3 65.8 69.7 74.3 75.1 73.7 69.7 63.0 58.3 66.0
MEAN DRY BULB 81 57.4 58.7 60.0 62.5 65.1 68.4 73.0 73.9 72.6 68.4 63.3 58.6 65.2
MEAN WET BULB 2 49.4 50.2 53.9 55.2 60.2 62.9 63.9 65.4 61.9 55.0 48.1
MEAN DEW POINT 2 42.5 44.9 49.4 50.2 55.7 59.1 60.2 62.0 59.1 49.8 38.3
NORMAL NO. DAYS WITH:
MAXIMUM 90 30 0.1 0.2 0.3 1.1 1.3 2.1 4.1 5.3 5.9 3.4 0.7 * 24.5
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 0.1 0.1
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 30 222 170 169 128 72 35 0 0 10 17 105 226 1154
NORMAL COOLING DEG. DAYS 30 14 32 36 77 97 176 293 316 271 162 45 18 1537
RH NORMAL (PERCENT)
HOUR 04 LST
HOUR 10 LST
HOUR 16 LST
HOUR 22 LST
S PERCENT POSSIBLE SUNSHINE 32 69 72 73 70 66 65 82 83 79 73 74 71 73
W/O MEAN NO. DAYS WITH:
HEAVY FOG (VISBY 1/4 MI) 26 1.6 1.7 1.1 1.2 0.6 0.6 0.5 0.8 1.3 2.4 2.4 2.1 16.3
THUNDERSTORMS 26 0.5 1.1 0.9 0.8 0.2 0.1 0.2 0.4 0.4 0.3 0.6 0.7 6.2
CLOUDINESS MEAN:
SUNRISE–SUNSET (OKTAS) 34 3.5 3.8 3.8 3.8 3.8 3.4 2.2 2.1 2.4 3.0 3.0 3.4 3.2
MIDNIGHT–MIDNIGHT (OKTAS)
MEAN NO. DAYS WITH:
CLEAR 34 14.3 12.4 12.9 12.0 11.4 13.6 20.9 22.4 18.4 16.1 16.5 15.0 185.9
PARTLY CLOUDY 34 8.1 6.9 9.3 9.8 11.8 10.5 8.9 7.4 8.4 9.3 7.4 8.0 105.8
CLOUDY 34 8.5 9.0 8.7 8.2 7.8 5.9 1.1 1.2 3.3 5.6 6.1 8.0 73.4
PR MEAN STATION PRESSURE(IN) 2 29.92 29.87 29.80 29.81 29.73 29.73 29.74 29.72 29.69 29.77 29.86 29.90 29.79
MEAN SEA–LEVEL PRES. (IN) 2 30.11 30.07 29.99 30.01 29.92 29.92 29.94 29.92 29.97 30.06 30.10
WINDS MEAN SPEED (MPH) 26 6.4 6.6 6.6 6.4 6.1 5.5 5.1 5.0 5.2 5.3 5.8 6.0 5.8
PREVAIL. DIR (TENS OF DEGS)
MAXIMUM 2–MINUTE:
SPEED (MPH) 2 21 15 20 16 16 13 12 12 13 15 15 16 21
DIR. (TENS OF DEGS) 33 20 03 28 25 26 26 26 23 25 25 33 33
YEAR OF OCCURRENCE 2000 2000 2000 2001 2000 2001 2001 2001 2000 2000 2000 2001 JAN 2000
MAXIMUM 5–SECOND:
SPEED (MPH) 2 29 28 30 25 25 20 18 18 18 24 24 23 30
DIR. (TENS OF DEGS) 33 25 03 25 27 25 26 26 25 27 24 26 03
YEAR OF OCCURRENCE 2000 2000 2000 2001 2000 2000 2001 2000 2000 2000 2000 2001 MAR 2000
PRECIPITATION NORMAL (IN) 30 2.92 3.07 2.61 1.03 0.19 0.03 0.01 0.14 0.45 0.31 1.98 2.03 14.77
MAXIMUM MONTHLY (IN) 61 14.94 13.68 8.37 6.02 3.10 0.98 0.18 2.26 2.82 2.37 9.68 6.57 14.94
YEAR OF OCCURRENCE 1969 1998 1983 1965 1998 1999 1986 1977 1976 1987 1965 1971 JAN 1969
MINIMUM MONTHLY (IN) 61 0.00 T 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
YEAR OF OCCURRENCE 1976 1951 1959 1979 1981 1982 1983 1982 1980 1980 1980 1990 DEC 1990
MAXIMUM IN 24 HOURS (IN) 61 6.11 4.02 3.79 2.05 2.41 0.76 0.18 2.22 1.95 1.77 4.07 3.92 6.11
YEAR OF OCCURRENCE 1956 1944 1978 1956 1977 1993 1986 1977 1986 1983 1970 1965 JAN 1956
NORMAL NO. DAYS WITH:
PRECIPITATION 0.01 30 5.3 5.3 6.2 3.4 1.0 0.5 0.2 0.7 1.8 1.8 3.6 4.4 34.2
PRECIPITATION 1.00 30 1.0 1.2 0.7 0.2 0.1 0.0 0.0 * 0.1 * 0.6 0.6 4.5
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 0.0 0.0
MAXIMUM MONTHLY (IN) 56 0.3 T 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.3
YEAR OF OCCURRENCE 1949 1951 1947 JAN 1949
MAXIMUM IN 24 HOURS (IN) 56 0.3 T 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T 0.3
YEAR OF OCCURRENCE 1949 1951 1947 JAN 1949
MAXIMUM SNOW DEPTH (IN) 56 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 Los Angeles, California downtown L.A./USC Campus (CQT)

PRECIPITATION (inches) 2001 LOS ANGELES, CALIFORNIA CA (CQT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0.00 0.13 T 0.03 0.03 0.07 0.00 0.35 0.02 0.29 3.26 2.36 6.54
1973 4.39 7.89 2.70 0.00 T 0.00 0.00 0.00 0.00 0.12 1.68 0.67 17.45
1974 8.35 0.14 3.78 0.10 0.08 0.00 0.00 0.00 0.00 0.58 0.07 3.59 16.69
1975 0.12 3.54 4.83 1.53 0.09 0.00 0.00 0.00 0.00 0.27 0.00 0.32 10.70
1976 0.00 3.71 1.81 0.84 0.05 0.22 0.00 0.08 2.82 0.24 0.49 0.75 11.01
1977 2.84 0.17 1.89 0.00 3.03 0.00 0.00 2.26 0.00 0.00 0.08 4.70 14.97
1978 7.70 8.91 8.02 1.77 0.00 0.00 0.00 0.00 0.39 0.05 2.28 1.45 30.57
1979 6.59 3.06 5.85 0.00 0.00 0.00 0.00 0.01 T 0.77 0.21 0.51 17.00
1980 7.50 12.75 4.79 0.31 0.13 0.00 0.00 0.00 0.00 0.00 0.00 0.85 26.33
1981 2.02 1.48 4.10 0.53 0.00 0.00 0.00 0.00 0.02 0.49 1.80 0.48 10.92
1982 2.17 0.70 3.54 1.39 0.12 0.00 0.00 0.00 0.84 0.19 4.41 1.05 14.41
1983 6.49 4.37 8.37 5.16 0.36 0.01 0.00 0.79 1.99 0.75 2.52 3.23 34.04
1984 0.17 0.00 0.28 0.69 0.00 0.01 0.00 0.40 0.23 0.15 1.44 5.53 8.90
1985 0.71 2.84 1.29 0.00 0.23 0.00 0.00 0.00 0.19 0.42 2.91 0.33 8.92
1986 2.19 6.10 5.27 0.45 0.00 0.00 0.18 0.00 1.97 0.53 0.94 0.37 18.00
1987 1.39 1.22 0.95 0.06 0.00 0.05 0.01 0.00 0.09 2.37 1.13 1.84 9.11
1988 1.65 1.72 0.26 3.41 0.00 0.00 0.00 0.05 0.04 0.00 0.70 3.80 11.63
1989 0.73 1.90 0.81 0.00 0.05 0.00 0.00 0.00 0.35 0.43 0.29 0.00 4.56
1990 1.24 3.12 0.17 0.58 1.17 0.00 0.00 0.02 0.00 0.00 0.19 0.00 6.49
1991 1.69 4.13 5.92 0.03 0.00 0.01 0.13 0.00 0.09 0.37 0.00 3.22 15.59
1992 1.74 7.96 7.12 0.33 0.04 0.00 0.08 0.00 0.00 0.70 0.00 4.68 22.65
1993 11.77 6.61 2.74 0.00 0.02 0.76 0.00 0.00 0.00 0.16 0.66 0.78 23.50
1994 0.33 3.21 1.86 0.83 0.28 0.00 0.00 0.00 0.00 0.19 0.61 1.35 8.66
1995 12.56 1.30 6.98 0.58 0.18 0.60 0.02 0.00 0.00 0.00 0.09 1.34 23.65
1996 3.16 4.94 2.16 0.71 0.04 0.00 0.00 0.00 0.00 1.06 1.59 4.09 17.75
1997 5.58 0.08 0.00 0.00 0.00 0.00 0.00 0.00 0.45 0.00 2.06 2.52 10.69
1998 4.12 13.68 4.06 0.97 3.10 0.05 0.00 0.00 0.01 0.00 1.32 0.54 27.85
1999 1.85 0.56 1.24 2.57 0.02 0.98 T 0.00 T 0.00 0.44 0.40 8.06
2000 0.88 5.54 2.82 1.49 T 0.00 0.00 0.07 0.15 0.98 T T 11.93
2001 5.59 8.87 1.17 1.11 0.00 T T 0.00 0.00 0.06 1.42 1.38 19.60
POR=124 YRS 3.49 3.23 2.45 1.09 0.25 0.05 0.01 0.10 0.31 0.30 1.67 1.89 14.84

2001 Los Angeles, California downtown L.A./USC Campus (CQT)

AVERAGE TEMPERATURE (F) 2001 LOS ANGELES, CALIFORNIA CA (CQT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 55.5 60.3 63.7 63.9 67.6 72.2 78.0 77.4 72.3 67.2 62.2 58.1 66.5
1973 56.4 60.0 57.9 63.1 65.8 72.0 72.4 73.6 70.0 68.8 60.0 59.9 65.0
1974 55.2 59.2 59.6 64.7 65.7 72.2 74.1 72.3 73.2 67.6 64.0 56.2 65.3
1975 57.6 55.8 55.7 56.0 62.7 65.7 72.5 71.9 74.0 66.4 61.2 57.0 63.0
1976 59.4 56.4 58.4 57.8 64.3 71.1 72.6 71.6 72.6 70.7 66.9 60.4 65.2
1977 58.1 63.1 56.9 63.7 61.9 69.2 74.2 75.6 71.8 69.0 66.3 60.8 65.9
1978 58.1 58.9 63.2 60.8 68.6 71.8 73.4 73.7 76.0 70.3 58.4 53.2 65.5
1979 53.3 55.0 57.9 62.7 65.4 71.5 72.1 72.9 77.4 68.7 64.6 63.2 65.4
1980 60.9 64.6 60.9 64.8 63.2 71.8 77.1 76.3 72.6 71.5 65.3 63.7 67.7
1981 61.8 64.3 62.0 66.0 68.9 77.4 77.2 78.3 75.0 68.5 65.0 62.1 68.9
1982 57.1 64.0 59.3 62.2 64.4 65.3 74.0 75.1 73.9 70.9 61.7 58.1 65.5
1983 61.9 63.0 63.9 63.2 70.7 70.7 75.9 80.8 79.1 74.2 63.5 59.8 68.9
1984 61.2 61.9 65.6 65.3 72.4 72.2 78.7 76.4 81.3 68.5 61.0 57.2 68.5
1985 57.5 60.4 59.3 66.8 66.3 73.5 79.2 75.7 71.8 71.3 60.4 61.7 67.0
1986 65.9 62.4 64.5 66.4 68.1 71.2 73.2 76.0 68.8 69.4 66.4 60.1 67.7
1987 57.2 60.3 61.2 67.8 68.1 69.7 70.8 73.0 75.2 71.9 62.9 54.4 66.0
1988 58.3 62.9 64.9 64.1 67.2 67.9 74.3 72.9 72.2 69.7 61.9 57.1 66.1
1989 56.3 56.4 62.4 67.9 66.2 69.8 75.1 72.8 74.5 69.2 66.7 62.7 66.7
1990 59.4 58.0 61.7 65.7 66.9 74.3 77.3 74.0 76.0 73.2 65.6 57.5 67.5
1991 59.2 63.5 56.8 64.2 63.9 67.1 71.0 73.1 73.6 72.1 66.2 59.6 65.9
1992 60.3 62.3 60.8 69.6 69.0 70.4 75.9 78.9 76.6 70.4 65.1 56.5 68.0
1993 57.3 58.3 64.5 67.0 68.9 72.4 73.0 74.4 74.3 71.2 64.6 60.8 67.2
1994 62.2 59.3 64.7 64.3 65.1 74.4 73.6 80.5 76.5 70.4 59.9 59.9 67.6
1995 58.4 65.3 62.6 64.8 64.0 69.0 75.8 77.5 77.0 71.5 67.1 60.9 67.8
1996 60.9 61.3 63.0 68.8 69.0 71.9 75.1 77.2 73.5 67.0 64.3 59.7 67.6
1997 58.7 61.0 65.1 65.7 72.7 71.0 73.2 77.6 79.8 71.1 65.2 58.9 68.3
1998 58.8 57.1 61.9 62.2 64.2 68.8 76.2 79.9 73.6 69.0 62.4 59.1 66.1
1999 60.8 59.9 56.9 59.4 63.3 66.8 71.8 71.4 69.2 71.5 61.8 58.1 64.2
2000 58.5 57.6 59.5 64.1 67.7 71.2 72.3 74.7 72.7 65.1 59.0 58.9 65.1
2001 54.4 54.7 60.4 59.9 67.3 70.8 71.0 72.0 71.4 68.2 62.0 56.4 64.0
POR=124 YRS 56.4 57.6 59.1 61.4 64.0 67.7 72.0 72.8 71.4 67.2 62.4 57.8 64.2

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 Los Angeles, California downtown L.A./USC Campus (CQT)

HEATING DEGREE DAYS (base 65 F) 2001 LOS ANGELES, CALIFORNIA CA (CQT)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1972–73 0 0 0 14 97 230 266 136 214 77 32 2 1068
1973–74 0 0 1 8 156 174 300 160 171 54 32 1 1057
1974–75 0 0 0 25 73 268 243 254 283 262 75 21 1504
1975–76 0 0 0 31 132 247 190 246 215 215 50 12 1338
1976–77 0 0 0 0 62 138 215 86 247 57 108 1 914
1977–78 0 0 0 14 51 132 209 174 102 122 24 0 828
1978–79 0 0 0 7 209 361 354 274 226 80 46 6 1563
1979–80 0 0 0 1 59 114 128 60 123 79 75 4 643
1980–81 0 0 0 2 41 85 103 91 97 43 1 0 463
1981–82 0 0 0 11 58 102 238 58 184 113 41 16 821
1982–83 0 0 0 3 117 205 134 73 68 68 2 0 670
1983–84 0 0 0 0 99 158 140 99 29 59 5 0 589
1984–85 0 0 0 4 129 239 225 162 179 40 21 0 999
1985–86 0 0 0 0 163 131 42 125 92 32 7 0 592
1986–87 0 0 8 2 14 151 241 140 131 31 19 0 737
1987–88 0 0 0 3 91 323 216 82 81 88 30 11 925
1988-89 0 0 1 2 98 258 270 271 104 36 27 5 1072
1989-90 0 0 0 2 27 102 173 206 130 26 16 2 684
1990-91 0 0 0 0 42 244 183 63 248 74 72 2 928
1991–92 0 0 0 23 46 168 159 114 125 1 0 0 636
1992–93 0 0 0 1 49 256 235 181 68 9 0 6 805
1993–94 0 0 0 0 45 136 106 153 61 60 35 0 596
1994–95 0 0 0 0 158 160 211 62 91 59 52 14 807
1995–96 0 0 0 1 6 132 146 125 83 16 3 1 513
1996–97 0 0 0 31 76 158 196 120 61 49 0 0 691
1997–98 0 0 0 0 71 193 185 216 118 130 36 3 952
1998–99 0 0 0 1 79 200 137 144 245 211 66 32 1115
1999–00 0 0 2 1 95 207 197 211 166 61 9 0 949
2000–01 0 0 0 36 179 186 321 293 147 164 5 0 1331
2001– 0 0 0 3 97 260

2001 Los Angeles, California downtown L.A./USC Campus (CQT)

COOLING DEGREE DAYS (base 65 F) 2001 LOS ANGELES, CALIFORNIA CA (CQT)
YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANNUAL
1972 0 4 27 34 122 223 409 391 225 89 21 25 1570
1973 9 2 0 25 64 220 236 272 157 133 9 21 1148
1974 3 5 8 51 58 223 288 235 254 115 53 2 1295
1975 21 0 0 0 11 48 241 221 277 82 26 4 931
1976 22 3 20 10 32 203 245 212 233 185 123 2 1290
1977 7 39 3 23 18 135 293 334 210 148 96 8 1314
1978 0 8 52 2 145 212 269 277 338 177 17 0 1497
1979 0 0 14 17 67 209 229 252 379 124 53 62 1406
1980 10 54 3 82 26 215 380 357 233 210 56 53 1679
1981 12 75 13 81 132 380 387 422 306 124 67 17 2016
1982 0 36 15 36 33 32 286 322 275 194 25 0 1254
1983 44 23 41 21 185 174 342 495 432 292 60 4 2113
1984 29 14 56 73 240 222 433 360 496 123 13 6 2065
1985 0 41 10 100 68 264 447 339 210 203 31 35 1748
1986 77 56 83 80 110 194 261 349 132 145 65 6 1558
1987 6 18 21 120 121 147 186 257 312 221 36 1 1446
1988 13 30 84 68 107 107 297 252 223 154 14 20 1369
1989 8 37 31 131 73 154 318 251 290 139 85 41 1558
1990 10 16 36 54 81 291 388 287 336 262 68 20 1849
1991 8 28 0 54 43 72 191 260 265 250 88 6 1265
1992 17 44 1 146 132 168 347 435 353 175 59 0 1877
1993 6 0 59 77 129 232 254 299 287 199 38 12 1592
1994 25 0 59 47 47 288 272 488 354 178 9 10 1777
1995 13 76 24 61 31 142 341 394 369 212 77 12 1752
1996 25 26 28 134 134 215 320 386 266 101 60 0 1695
1997 7 14 72 79 245 188 260 402 450 196 85 11 2009
1998 0 0 29 53 18 125 356 468 266 132 11 24 1482
1999 14 8 0 49 23 90 217 202 136 208 7 0 954
2000 5 2 4 39 98 192 233 308 239 45 2 3 1170
2001 1 13 9 18 85 180 191 226 200 110 14 3 1050

2001 Los Angeles, California downtown L.A./USC Campus (CQT)

SNOWFALL (inches) 2001 LOS ANGELES, CALIFORNIA CA (CQT)
YEAR JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN TOTAL
1970–71 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
1971–72 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
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
1984–85
1996–97
1997–98
1998–99
1999–00
2000–01
2001–
POR=43 YRS 0.0 0.0 0.0 0.0 0.0 T 0.0 T 0.0 0.0 0.0 0.0 T



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2001 Los Angeles, California Downtown L.A./USC Campus (CQT) forum