Climatological Report (Daily)
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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CDUS41 KBOX 212128
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
528 PM EDT TUE JUL 21 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR JULY 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 79 1240 PM 102 1977 83 -4 80
MINIMUM 62 504 AM 52 1890 67 -5 66
AVERAGE 71 74 -3 73
PRECIPITATION (IN)
TODAY 0.06 2.33 1938 0.10 -0.04 0.00
MONTH TO DATE 1.88 2.18 -0.30 2.11
SINCE JUN 1 3.34 6.07 -2.73 3.43
SINCE JAN 1 13.83 23.72 -9.89 23.22
SNOWFALL (IN)
TODAY 0.0 T 1954 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
DEGREE DAYS
HEATING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 14 50 -36 44
SINCE JUL 1 0 0 0 0
COOLING
TODAY 6 10 -4 8
MONTH TO DATE 253 191 62 242
SINCE JUN 1 477 329 148 432
SINCE JAN 1 538 362 176 461
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 22 HIGHEST WIND DIRECTION S (180)
HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 10.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
HEAVY RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 400 AM
LOWEST 52 1200 PM
AVERAGE 74
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 103 1926
2011
MINIMUM TEMPERATURE (F) 67 55 1890
SUNRISE AND SUNSET
JULY 21 2026..........SUNRISE 526 AM EDT SUNSET 815 PM EDT
JULY 22 2026..........SUNRISE 527 AM EDT SUNSET 814 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$