Climatological Report (Daily)
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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CDUS41 KBOX 210809
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
409 AM EDT TUE JUL 21 2026
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR JULY 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 82 115 PM 99 1991 83 -1 87
MINIMUM 64 514 AM 54 1879 67 -3 70
1890
AVERAGE 73 74 -1 79
PRECIPITATION (IN)
YESTERDAY 0.00 1.78 1982 0.11 -0.11 0.20
MONTH TO DATE 1.82 2.08 -0.26 2.11
SINCE JUN 1 3.28 5.97 -2.69 3.43
SINCE JAN 1 13.77 23.62 -9.85 23.22
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 JUN 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
DEGREE DAYS
HEATING
YESTERDAY 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
YESTERDAY 8 10 -2 14
MONTH TO DATE 247 181 66 234
SINCE JUN 1 471 319 152 424
SINCE JAN 1 532 352 180 453
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION S (200)
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION S (190)
HIGHEST GUST SPEED 30 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 9.2
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.4
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 68 1100 PM
LOWEST 30 1200 PM
AVERAGE 49
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 102 1977
MINIMUM TEMPERATURE (F) 67 52 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.
$$