Climatological Report (Monthly) Issued by NWS
000
CXUS56 KMTR 010853
CLMAPC
CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
1253 AM PST MON JAN 01 2024
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...THE NAPA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 78 MM
LOW 16 12/05/2013
HIGHEST 70 12/16 62 12/24
LOWEST 30 12/09 28 12/18
AVG. MAXIMUM 61.3 55.9
AVG. MINIMUM 41.8 37.9
MEAN 51.5 46.9
DAYS MAX >= 90 0 0
DAYS MAX <= 32 0 0
DAYS MIN <= 32 4 8
DAYS MIN <= 0 0 0
PRECIPITATION (INCHES)
TOTALS 4.33 3.82 0.51 7.48
DAILY AVG. 0.14 0.25
DAYS >= .01 11 12
DAYS >= .10 8 9
DAYS >= .50 4 6
DAYS >= 1.00 1 2
GREATEST
24 HR. TOTAL 1.52 12/18 TO 12/19 1.85 12/30 TO 12/31
DEGREE DAYS
HEATING TOTAL 411 550
SINCE 7/1 817 MM
COOLING TOTAL 0 0
SINCE 1/1 389 MM
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WIND (MPH)
AVERAGE WIND SPEED 5.4
RESULTANT WIND SPEED/DIRECTION 3/100
HIGHEST WIND SPEED/DIRECTION 28/080 DATE 12/18
HIGHEST GUST SPEED/DIRECTION 36/080 DATE 12/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.43
NUMBER OF DAYS FAIR 14
NUMBER OF DAYS PC 11
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 77
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 2 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 8
LIGHT RAIN 11 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 23 FOG W/VIS <= 1/4 MILE 11
HAZE 4
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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