388
CDUS41 KBOX 212122
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
522 PM EDT THU MAY 21 2026
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 21 2026
VALID TODAY AS OF 0500 PM LOCAL TIME.
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)
TODAY
MAXIMUM 73 1215 AM 93 1921 68 5 50
MINIMUM 58 359 PM 41 1907 52 6 47
AVERAGE 66 60 6 49
PRECIPITATION (IN)
TODAY T 2.24 1889 0.10 -0.10 T
MONTH TO DATE 0.99 2.13 -1.14 3.35
SINCE MAR 1 6.10 9.93 -3.83 10.58
SINCE JAN 1 9.39 16.53 -7.14 15.89
SNOWFALL (IN)
TODAY 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
TODAY 0 6 -6 16
MONTH TO DATE 126 180 -54 127
SINCE MAR 1 1341 1504 -163 1246
SINCE JUL 1 5468 5442 26 5005
COOLING
TODAY 1 1 0 0
MONTH TO DATE 41 13 28 16
SINCE MAR 1 44 17 27 22
SINCE JAN 1 44 17 27 22
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 11.1
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 60 1100 AM
LOWEST 35 400 AM
AVERAGE 48
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 93 1959
MINIMUM TEMPERATURE (F) 52 39 1894
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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