


Climatological Report (Monthly)
Issued by NWS Boston, MA
Issued by NWS Boston, MA
689 CXUS51 KBOX 011621 CLMBDL CLIMATE REPORT NATIONAL WEATHER SERVICE BOSTON/NORTON MA 1221 PM EDT SUN JUN 01 2025 ................................... ...THE HARTFORD CT CLIMATE SUMMARY FOR THE MONTH OF MAY 2025... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1904 TO 2025 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE NORMAL .............................................................. TEMPERATURE (F) RECORD HIGH 99 05/26/2010 05/20/1996 LOW 28 05/01/2008 05/07/2001 05/04/1985 HIGHEST 85 05/03 93 LOWEST 39 05/12 41 AVG. MAXIMUM 70.2 71.7 -1.5 AVG. MINIMUM 50.8 48.4 2.4 MEAN 60.5 60.0 0.5 DAYS MAX >= 90 0 1.4 -1.4 DAYS MAX <= 32 0 0.0 0.0 DAYS MIN <= 32 0 0.4 -0.4 DAYS MIN <= 0 0 0.0 0.0 PRECIPITATION (INCHES) RECORD MAXIMUM 12.00 1989 MINIMUM 0.73 1959 TOTALS 8.23 3.79 4.44 DAILY AVG. 0.27 0.12 0.15 DAYS >= .01 18 12.3 5.7 DAYS >= .10 10 7.4 2.6 DAYS >= .50 6 2.4 3.6 DAYS >= 1.00 4 0.8 3.2 GREATEST 24 HR. TOTAL 2.15 05/08 TO 05/09 SNOWFALL (INCHES) RECORDS TOTAL 1.3 1977 SNOW DEPTH T 05/07/1977 TOTALS 0.0 0.0 0.0 LIQUID EQUIV 0.00 SINCE 7/1 23.4 51.7 -28.3 SNOWDEPTH AVG. 0 DAYS >= TRACE 0 0.0 0.0 DAYS >= 1.0 0 0.0 0.0 GREATEST SNOW DEPTH 0 24 HR TOTAL MM DEGREE DAYS HEATING TOTAL 164 193 -29 SINCE 7/1 5074 5849 -775 COOLING TOTAL 33 40 -7 SINCE 1/1 43 47 -4 .............................................................. WIND (MPH) AVERAGE WIND SPEED 8.0 RESULTANT WIND SPEED/DIRECTION 1/260 HIGHEST WIND SPEED/DIRECTION 43/250 DATE 05/03 HIGHEST GUST SPEED/DIRECTION 58/230 DATE 05/03 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.76 NUMBER OF DAYS FAIR 1 NUMBER OF DAYS PC 12 NUMBER OF DAYS CLOUDY 16 AVERAGE RH (PERCENT) 70 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 3 MIXED PRECIP 0 HEAVY RAIN 5 RAIN 9 LIGHT RAIN 16 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 19 FOG W/VIS <= 1/4 MILE 0 HAZE 4 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$