CXUS55 KBYZ 011153 CLMBIL CLIMATE REPORT NATIONAL WEATHER SERVICE BILLINGS MT 451 AM MST THU JAN 01 2026 ................................... ...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1934 TO 2025 WEATHER OBSERVED NORMAL DEPART VALUE DATE(S) VALUE FROM NORMAL ................................................ TEMPERATURE (F) HIGHEST 61 12/11 12/25 LOWEST 3 12/28 AVG. MAXIMUM 43.9 36.1 7.8 AVG. MINIMUM 25.0 19.2 5.8 MEAN 34.5 27.6 6.9 DAYS MAX >= 90 0 DAYS MAX <= 32 3 DAYS MIN <= 32 23 DAYS MIN <= 0 0 PRECIPITATION (INCHES) TOTALS 1.39 0.57 0.82 DAYS >= .01 8 DAYS >= .10 2 DAYS >= .50 1 DAYS >= 1.00 0 GREATEST 24 HR. TOTAL 1.09 12/11 TO 12/12 SNOWFALL (INCHES) TOTALS 14.1 9.8 4.3 SINCE 7/1 21.1 21.1 0.0 SNOWDEPTH AVG. 2 DAYS >= TRACE 13 DAYS >= 1.0 2 GREATEST SNOW DEPTH 12 12/13 12/14 24 HR TOTAL 13.0 12/11 TO 12/12 DEGREE DAYS HEATING TOTAL 939 1158 -219 SINCE 7/1 2168 2761 -593 COOLING TOTAL 0 0 0 SINCE 1/1 659 662 -3 ................................................ WIND (MPH) AVERAGE WIND SPEED 12.3 HIGHEST WIND SPEED/DIRECTION 61/280 DATE 12/17 HIGHEST GUST SPEED/DIRECTION 79/280 DATE 12/17 AVERAGE RH (PERCENT) 63 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 1 RAIN 2 LIGHT RAIN 12 FREEZING RAIN 0 LT FREEZING RAIN 1 HAIL 1 HEAVY SNOW 1 SNOW 3 LIGHT SNOW 12 SLEET 0 FOG 9 FOG W/VIS <= 1/4 MILE 4 HAZE 0 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...DECEMBER 2025 MONTH IN REVIEW FOR BILLINGS... BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND STATISTICS FOR BILLINGS FOR DECEMBER 2025. ALL TEMPERATURES ARE IN DEGREES FAHRENHEIT AND ALL PRECIPITATION AMOUNTS ARE IN INCHES. NORMALS ARE 30 YEAR AVERAGES CALCULATED FROM 1991 TO 2020. MONTHLY RANKINGS FOR PRECIPITATION...SNOWFALL...AND TEMPERATURES USE A PERIOD OF RECORD THAT STARTED IN AUGUST 1934 AT THE BILLINGS AIRPORT. MONTHLY RANKINGS FOR WIND USE A PERIOD OF RECORD THAT STARTED IN 1984. NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION. ...BILLINGS MONTHLY PRECIPITATION... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 1.39 0.57 +0.82 11TH WETTEST OUT OF 92 YEARS (RECORD WETTEST WAS 2.00 IN 1973) (WETTEST SINCE 1.81 IN 2017) ...BILLINGS DECEMBER 2025 BROKEN OR TIED DAILY PRECIPITATION RECORDS... 0.37 ON DECEMBER 11 (OLD RECORD 0.35 IN 1984) 0.72 ON DECEMBER 12 (OLD RECORD 0.29 IN 1946) ...BILLINGS MONTHLY SNOWFALL... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 14.1 9.8 +4.3 21ST SNOWIEST OUT OF 92 YEARS (RECORD SNOWIEST WAS 30.4 IN 2016) (SNOWIEST SINCE 15.2 IN 2021) ...BILLINGS DECEMBER 2025 BROKEN OR TIED DAILY SNOWFALL RECORDS... 8.8 ON DECEMBER 12 (OLD RECORD 4.7 IN 1946) ...BILLINGS AVERAGE TEMPERATURES... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 34.5 27.6 +6.9 8TH WARMEST OUT OF 92 YEARS (RECORD WARMEST WAS 37.3 IN 1957) (WARMEST SINCE 36.7 IN 2024) ...BILLINGS AVERAGE HIGH TEMPERATURES... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 43.9 36.1 +7.8 9TH WARMEST OUT OF 92 YEARS (RECORD WARMEST WAS 48.9 IN 1939) (WARMEST SINCE 46.6 IN 2024) ...BILLINGS DECEMBER 2025 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS... 61 ON DECEMBER 25 (OLD RECORD 56 IN 2005) 55 ON DECEMBER 31 (OLD RECORD 53 IN 1962) ...BILLINGS DECEMBER 2025 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS... NONE ...BILLINGS AVERAGE LOW TEMPERATURES... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 25.0 19.2 +5.8 TIED FOR THE 8TH WARMEST OUT OF 92 YEARS (RECORD WARMEST WAS 28.0 TIED IN 2023) (WARMEST SINCE 26.8 IN 2024) ...BILLINGS DECEMBER 2025 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS... NONE ...BILLINGS DECEMBER 2025 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS... NONE ...BILLINGS MONTHLY WIND AVERAGES... MONTH 2025 VALUES NORMALS DEPARTURE RANKING DECEMBER 11.7 12.9 -1.2 TIED FOR THE 14TH LEAST WINDIEST OUT OF 77 YEARS (RECORD LEAST WINDIEST WAS 10.3 IN 1983) (LEAST WINDIEST SINCE 11.5 IN 2024) $$