443
CDUS41 KBOX 172129
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
529 PM EDT WED SEP 17 2025
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 17 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 70 116 PM 91 1915 73 -3 77
MINIMUM 56 326 AM 44 2013 58 -2 57
AVERAGE 63 65 -2 67
PRECIPITATION (IN)
TODAY 0.00 2.77 1995 0.13 -0.13 0.00
MONTH TO DATE 1.43 1.90 -0.47 T
SINCE SEP 1 1.43 1.90 -0.47 T
SINCE JAN 1 26.38 29.94 -3.56 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 SEP 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 2 0 0
MONTH TO DATE 18 20 -2 1
SINCE SEP 1 18 20 -2 1
SINCE JUL 1 25 29 -4 3
COOLING
TODAY 0 3 -3 2
MONTH TO DATE 35 70 -35 56
SINCE SEP 1 35 70 -35 56
SINCE JAN 1 792 770 22 866
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (70)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 7.8
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 300 AM
LOWEST 76 100 PM
AVERAGE 82
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1891
1906
1955
MINIMUM TEMPERATURE (F) 58 43 1875
SUNRISE AND SUNSET
SEPTEMBER 17 2025.....SUNRISE 626 AM EDT SUNSET 650 PM EDT
SEPTEMBER 18 2025.....SUNRISE 627 AM EDT SUNSET 648 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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