CXUS56 KMTR 010834 CLMAPC CLIMATE REPORT NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1234 AM PST THU JAN 01 2026 ................................... ...THE NAPA AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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 78 MM LOW 16 12/05/2013 HIGHEST 67 12/03 67 12/04 12/06 12/08 LOWEST 33 12/28 29 12/09 12/29 AVG. MAXIMUM 54.5 59.0 AVG. MINIMUM 42.4 40.9 MEAN 48.4 50.0 DAYS MAX >= 90 0 0 DAYS MAX <= 32 0 0 DAYS MIN <= 32 0 1 DAYS MIN <= 0 0 0 PRECIPITATION (INCHES) TOTALS 3.97 3.82 0.15 5.93 DAILY AVG. 0.13 0.14 DAYS >= .01 10 13 DAYS >= .10 9 9 DAYS >= .50 3 5 DAYS >= 1.00 1 1 GREATEST 24 HR. TOTAL 1.24 12/24 TO 12/25 1.65 12/13 TO 12/14 DEGREE DAYS HEATING TOTAL 505 458 SINCE 7/1 980 MM COOLING TOTAL 0 0 SINCE 1/1 211 MM ................................................................ WIND (MPH) AVERAGE WIND SPEED 8.2 RESULTANT WIND SPEED/DIRECTION 6/110 HIGHEST WIND SPEED/DIRECTION 32/140 DATE 12/25 HIGHEST GUST SPEED/DIRECTION 44/140 DATE 12/25 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.64 NUMBER OF DAYS FAIR 8 NUMBER OF DAYS PC 8 NUMBER OF DAYS CLOUDY 15 AVERAGE RH (PERCENT) 88 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 3 RAIN 8 LIGHT RAIN 13 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 31 FOG W/VIS <= 1/4 MILE 6 HAZE 4 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$