139  
CXUS51 KBOX 011357 RRA  
CLSBDL  
 
BOSCLSBDL 000  
TTAA00 BOX 011352  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
952 AM EDT MON SEP 01 2025  
   
...............................
 
 
...THE HARTFORD CT CLIMATE SUMMARY FOR THE SEASON, FROM  
6/1/2025 TO 8/31/2025...  
 
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 103 07/22/2011  
LOW 36 08/31/1965  
HIGHEST 99 06/24 98  
LOWEST 45 06/02 50  
06/03  
08/28  
AVG. MAXIMUM 83.2 82.8 0.4  
AVG. MINIMUM 61.2 61.0 0.2  
MEAN 72.2 71.9 0.3  
DAYS MAX >= 90 22 16.8 5.2  
DAYS MAX <= 32 0 0.0 0.0  
DAYS MIN <= 32 0 0.0 0.0  
DAYS MIN <= 0 0 0.0 0.0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 27.88 1955  
MINIMUM 4.42 2020  
TOTALS 12.39 12.66 -0.27  
DAILY AVG. 0.13 0.14 -0.01  
DAYS >= .01 28 32.9 -4.9  
DAYS >= .10 16 21.2 -5.2  
DAYS >= .50 9 8.2 0.8  
DAYS >= 1.00 3 3.6 -0.6  
GREATEST  
24 HR. TOTAL 2.58 07/31 TO 07/31  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL T 2021  
SNOW DEPTH 0 MM  
TOTALS 0.0 0.0 0.0  
LIQUID EQUIV 0.00  
SINCE 7/1 0.0 0.0 0.0  
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 0.0  
 
DEGREE DAYS  
HEATING TOTAL 40 42 -2  
SINCE 7/1 19 3 16  
COOLING TOTAL 728 678 50  
SINCE 1/1 771 725 46  
 
FREEZE DATES  
RECORD  
EARLIEST 09/20/1979  
LATEST 05/20/2002  
EARLIEST MM  
LATEST 04/18    
..........................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 6.4  
RESULTANT WIND SPEED/DIRECTION 2/210  
HIGHEST WIND SPEED/DIRECTION 35/320 DATE 07/20  
HIGHEST GUST SPEED/DIRECTION 49/290 DATE 07/03  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.58  
NUMBER OF DAYS FAIR 21  
NUMBER OF DAYS PC 41  
NUMBER OF DAYS CLOUDY 30  
 
AVERAGE RH (PERCENT) 70  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 10 MIXED PRECIP 0  
HEAVY RAIN 12 RAIN 15  
LIGHT RAIN 29 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 0 SLEET 0  
FOG 37 FOG W/VIS <= 1/4 MILE 2  
HAZE 9  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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