Climatological Report (Monthly)
Issued by NWS Boise, ID
Issued by NWS Boise, ID
588 CXUS55 KBOI 011809 CLMBOI CLIMATE REPORT NATIONAL WEATHER SERVICE BOISE ID 1055 AM MST THU FEB 01 2024 JANUARY, 2024, WAS A MONTH OF EXTREMES. THE FIRST FIVE DAYS WERE MILD AND MOIST, BUT THE 6TH THROUGH 17TH WERE VERY SNOWY WITH BOISE RECEIVING 21.9 INCHES, INCLUDING AROUND 3 INCHES ON THE 6TH, 7 INCHES ON THE 9TH-10TH, ANOTHER 7 INCHES ON THE 13TH, AND AROUND 3 INCHES ON THE 16TH-17TH. MAXIMUM SNOW DEPTH OF 10 INCHES WAS MEASURED ON THE MORNING OF THE 14TH. TOTAL SNOWFALL FOR THE MONTH WAS 22.1 INCHES, THE FOURTH MOST FOR ANY JANUARY AND 7TH MOST IN ANY MONTH. AN ARCTIC AIR MASS IN INTERIOR WESTERN CANADA SETTLED SOUTHWARD OVER THE AREA ON THE 12TH-17TH. BOISE DIPPED TO 7 DEGREES ABOVE ZERO ON THE 13TH, AND 3 ABOVE ZERO ON THE 15TH AND 16TH, THE COLDEST DAYS OF THE MONTH. THE HEAVY SNOWFALL ON THE 13TH OCCURRED WHEN TEMPERATURES WERE NEAR 15 DEGREES, UNUSUALLY COLD FOR SUCH A HEAVY SNOWFALL. THE FINAL SNOW ON THE 17TH OCCURRED DURING PASSAGE OF A PACIFIC WARM FRONT. SLEET AND LIGHT FREEZING RAIN ALSO FELL ON THE AFTERNOON OF THE 17TH. BY THE 19TH TEMPERATURES WERE ALREADY ABOVE NORMAL AND SNOW WAS MELTING RAPIDLY. BY THE 24TH THE SNOW DEPTH WAS ZERO. AROUND THE 27TH UPPER LEVEL HIGH PRESSURE ALOFT BUILT OVER THE INTERIOR WESTERN US IN RESPONSE TO DEEP LOW PRESSURE OFF THE COAST, CAUSING TEMPERATURES TO RISE EVEN FURTHER. DAILY RECORD HIGHS WERE SET ON THE LAST 3 DAYS OF THE MONTH. THE HIGH OF 66 DEGREES ON THE 31ST WAS THE WARMEST EVER RECORDED DURING THE MONTH OF JANUARY SURPASSING THE OLD RECORD OF 63 DEGREES SET IN 1953. NO OTHER YEAR HAD EVER REACHED 66 DEGREES BEFORE FEBRUARY 17TH. WITH ARCTIC COLD AND EXTREME WARMTH OCCURRING IN THE SAME MONTH THE AVERAGE MONTHLY TEMPERATURE OF 33.2 DEGREES ENDED UP 1.0 DEGREES ABOVE NORMAL. TOTAL PRECIPITATION WAS 2.22 INCHES, WELL ABOVE THE NORMAL VALUE OF 1.41 INCHES. ALMOST ALL OF IT FELL AS SNOW, WITH RAIN OCCURRING ONLY ON THE 3RD AND 5TH. ................................... ...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2024... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1875 TO 2024 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) HIGHEST 66R 01/31 LOWEST 3 01/15 01/16 AVG. MAXIMUM 40.7 38.8 1.9 AVG. MINIMUM 25.7 25.5 0.2 MEAN 33.2 32.2 1.0 DAYS MAX >= 90 0 DAYS MAX <= 32 6 DAYS MIN <= 32 23 DAYS MIN <= 0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 5.29 1875 TOTALS 2.23 1.41 0.82 DAYS >= .01 19 DAYS >= .10 8 DAYS >= .50 1 DAYS >= 1.00 0 GREATEST 24 HR. TOTAL 0.55 01/13 TO 01/13 SNOWFALL (INCHES) TOTALS 22.1 SINCE 7/1 26.0 GREATEST SNOW DEPTH 10 01/14 24 HR TOTAL MM DEGREE DAYS HEATING TOTAL 976 1018 -42 967 SINCE 7/1 2821 3251 -430 COOLING TOTAL 0 0 0 0 SINCE 1/1 0 0 0 .............................................................. WIND (MPH) AVERAGE WIND SPEED 6.5 HIGHEST WIND SPEED/DIRECTION 35/290 DATE 01/09 HIGHEST GUST SPEED/DIRECTION 50/290 DATE 01/09 AVERAGE RH (PERCENT) 77 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$