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 THU AUG 21 2025
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR AUGUST 21 2025...
VALID TODAY AS OF 0500 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 69 230 PM 97 1955 80 -11 76
MINIMUM 57 224 AM 52 1876 65 -8 58
1882
AVERAGE 63 72 -9 67
PRECIPITATION (IN)
TODAY 0.00 1.72 1991 0.10 -0.10 T
MONTH TO DATE 0.76 2.25 -1.49 3.70
SINCE JUN 1 5.09 9.41 -4.32 9.13
SINCE JAN 1 24.88 27.06 -2.18 34.14
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 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 2 0 2 0
MONTH TO DATE 7 0 7 1
SINCE JUN 1 51 54 -3 8
SINCE JUL 1 7 4 3 1
COOLING
TODAY 0 8 -8 2
MONTH TO DATE 136 179 -43 171
SINCE JUN 1 677 601 76 709
SINCE JAN 1 706 634 72 755
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 23 HIGHEST WIND DIRECTION NE (50)
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 13.3
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 400 AM
LOWEST 68 200 PM
AVERAGE 79
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 93 1955
2003
2019
MINIMUM TEMPERATURE (F) 65 47 1894
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 558 AM EDT SUNSET 736 PM EDT
AUGUST 22 2025........SUNRISE 559 AM EDT SUNSET 734 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$