Climatological Report (Monthly)
Issued by NWS Boston, MA
Issued by NWS Boston, MA
690
CXUS51 KBOX 011621
CLMBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1221 PM EDT SUN JUN 01 2025
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...THE BOSTON MA CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 97 05/26/1880
LOW 31 05/03/1882
HIGHEST 84 05/03 89
LOWEST 44 05/23 43
AVG. MAXIMUM 66.4 66.5 -0.1
AVG. MINIMUM 51.9 50.3 1.6
MEAN 59.2 58.4 0.8
DAYS MAX >= 90 0 0.6 -0.6
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 13.38 1954
MINIMUM 0.25 1944
TOTALS 7.25 3.25 4.00
DAILY AVG. 0.23 0.10 0.13
DAYS >= .01 14 11.8 2.2
DAYS >= .10 10 6.8 3.2
DAYS >= .50 3 2.0 1.0
DAYS >= 1.00 2 0.5 1.5
GREATEST
24 HR. TOTAL 3.45 05/22 TO 05/23
SNOWFALL (INCHES)
RECORDS
TOTAL 0.9 1938
TOTALS 0.0 0.0 0.0
LIQUID EQUIV 0.00
SINCE 7/1 28.1 49.2 -21.1
DAYS >= TRACE 0 0.0 0.0
DAYS >= 1.0 0 0.0 0.0
GREATEST
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 195 234 -39
SINCE 7/1 5073 5494 -421
COOLING TOTAL 23 29 -6
SINCE 1/1 29 33 -4
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WIND (MPH)
AVERAGE WIND SPEED 11.3
RESULTANT WIND SPEED/DIRECTION 1/270
HIGHEST WIND SPEED/DIRECTION 35/020 DATE 05/22
HIGHEST GUST SPEED/DIRECTION 49/030 DATE 05/22
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.75
NUMBER OF DAYS FAIR 2
NUMBER OF DAYS PC 8
NUMBER OF DAYS CLOUDY 19
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 7 MIXED PRECIP 0
HEAVY RAIN 6 RAIN 11
LIGHT RAIN 19 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 11 FOG W/VIS <= 1/4 MILE 2
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$