Climatological Report (Monthly)
Issued by NWS
Issued by NWS
966 CXUS56 KSGX 011014 CLMONT CLIMATE REPORT NATIONAL WEATHER SERVICE SAN DIEGO, CA 214 AM PST MON JAN 01 2024 ................................... ...THE ONTARIO INTL AIRPORT CA 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 87 12/01/2021 12/01/2021 LOW 28 12/23/1998 12/22/1998 HIGHEST 84 12/05 69 15 81 12/25 LOWEST 40 12/10 44 -4 35 12/18 AVG. MAXIMUM 69.9 66.9 3.0 63.4 AVG. MINIMUM 47.3 43.6 3.7 43.5 MEAN 58.6 55.2 3.4 53.5 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MAX >= 45 31 31 DAYS MAX >= 120 0 0 DAYS MIN <= 32 0 0.8 -0.8 0 PRECIPITATION (INCHES) RECORD MAXIMUM 7.73 2010 MINIMUM 0.00 1963 TOTALS 0.98 1.89 -0.91 1.69 DAILY AVG. 0.03 0.06 -0.03 0.05 DAYS >= .01 5 5.6 -0.6 7 DAYS >= .10 3 3.4 -0.4 3 DAYS >= .50 0 1.1 -1.1 1 DAYS >= 1.00 0 0.6 -0.6 1 DAYS >= %-5.2F 0 0 DAYS >= %-5.2F 0 0 GREATEST 24 HR. TOTAL 0.36 12/22 TO 12/22 1.07 12/11 TO 12/11 12/20 TO 12/20 12/22 TO 12/22 STORM TOTAL 0.36 1.07 (MM/DD(HH)) MM DEGREE DAYS HEATING TOTAL 191 304 -113 351 SINCE 7/1 284 463 -179 MM COOLING TOTAL 2 2 0 0 SINCE 1/1 1695 1969 -274 MM FREEZE DATES RECORD EARLIEST 11/30/2004 LATEST 02/14/2006 EARLIEST 02/24 LATEST 02/20 ................................................................ WIND (MPH) AVERAGE WIND SPEED 3.1 RESULTANT WIND SPEED/DIRECTION 1/310 HIGHEST WIND SPEED/DIRECTION 20/290 DATE 12/18 HIGHEST GUST SPEED/DIRECTION 26/060 DATE 12/09 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.54 NUMBER OF DAYS FAIR 8 NUMBER OF DAYS PC 17 NUMBER OF DAYS CLOUDY 6 AVERAGE RH (PERCENT) 56 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 1 MIXED PRECIP 0 HEAVY RAIN 2 RAIN 4 LIGHT RAIN 7 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 13 FOG W/VIS <= 1/4 MILE 5 HAZE 15 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$