295
CDUS41 KBOX 210525
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
125 AM EDT THU MAY 21 2026
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 20 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 91R 401 PM 91 1996 68 23 57
MINIMUM 65 406 AM 40 1892 51 14 49
AVERAGE 78 60 18 53
PRECIPITATION (IN)
YESTERDAY 0.00 1.83 2023 0.11 -0.11 T
MONTH TO DATE 0.99 2.03 -1.04 3.35
SINCE MAR 1 6.10 9.83 -3.73 10.58
SINCE JAN 1 9.39 16.43 -7.04 15.89
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0
2001
2002
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE MAR 1 1.9 10.6 -8.7 T
SINCE JUL 1 62.8 49.2 13.6 28.1
DEGREE DAYS
HEATING
YESTERDAY 0 6 -6 12
MONTH TO DATE 126 174 -48 111
SINCE MAR 1 1341 1498 -157 1230
SINCE JUL 1 5468 5436 32 4989
COOLING
YESTERDAY 13 1 12 0
MONTH TO DATE 40 12 28 16
SINCE MAR 1 43 16 27 22
SINCE JAN 1 43 16 27 22
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 12 RESULTANT WIND DIRECTION W (260)
HIGHEST WIND SPEED 28 HIGHEST WIND DIRECTION W (270)
HIGHEST GUST SPEED 39 HIGHEST GUST DIRECTION W (270)
AVERAGE WIND SPEED 13.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 1200 AM
LOWEST 35 900 PM
AVERAGE 61
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 93 1921
MINIMUM TEMPERATURE (F) 52 41 1907
SUNRISE AND SUNSET
MAY 21 2026...........SUNRISE 517 AM EDT SUNSET 805 PM EDT
MAY 22 2026...........SUNRISE 516 AM EDT SUNSET 806 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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