Climatological Report (Monthly)
Issued by NWS
Issued by NWS
014 CXUS56 KMTR 010853 CLMAPC CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1253 AM PST MON JAN 01 2024 ................................... ...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 ................................................................ 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 ................................................................ 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. $$