448
CXUS56 KMTR 011102
CLMAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
402 AM PDT MON SEP 01 2025
...............................
..THE NAPA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 106 MM
LOW 45 08/02/2013
08/27/2012
01/04/2000
HIGHEST 94 08/30 93 08/27
LOWEST 48 08/19 49 08/20
08/25
AVG. MAXIMUM 80.0 79.7
AVG. MINIMUM 53.8 54.2
MEAN 66.9 67.0
DAYS MAX >= 90 3 2
DAYS MAX <= 32 0 0
DAYS MIN <= 32 0 0
DAYS MIN <= 0 0 0
PRECIPITATION (INCHES)
TOTALS 0.00R 0.02 -0.02 T
DAILY AVG. 0.00 T
DAYS >= .01 0 0
DAYS >= .10 0 0
DAYS >= .50 0 0
DAYS >= 1.00 0 0
GREATEST
24 HR. TOTAL MM T 08/24 TO 08/24
DEGREE DAYS
HEATING TOTAL 7 8
SINCE 7/1 45 MM
COOLING TOTAL 74 77
SINCE 1/1 111 MM
............................................................
WIND (MPH)
AVERAGE WIND SPEED 9.1
RESULTANT WIND SPEED/DIRECTION 8/220
HIGHEST WIND SPEED/DIRECTION 25/270 DATE 08/13
HIGHEST GUST SPEED/DIRECTION 30/260 DATE 08/13
30/180 08/16
30/250 08/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.15
NUMBER OF DAYS FAIR 26
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 0 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 1
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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