899
CDUS41 KBOX 200529
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
129 AM EDT SAT SEP 20 2025
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 19 2025
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)
YESTERDAY
MAXIMUM 82 252 PM 92 1983 72 10 75
MINIMUM 61 1159 PM 42 1929 57 4 62
AVERAGE 72 65 7 69
PRECIPITATION (IN)
YESTERDAY 0.00 1.21 1936 0.12 -0.12 0.01
MONTH TO DATE 1.55 2.15 -0.60 0.01
SINCE SEP 1 1.55 2.15 -0.60 0.01
SINCE JAN 1 26.50 30.19 -3.69 34.15
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 SEP 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 3 -3 0
MONTH TO DATE 18 25 -7 1
SINCE SEP 1 18 25 -7 1
SINCE JUL 1 25 34 -9 3
COOLING
YESTERDAY 7 2 5 4
MONTH TO DATE 45 74 -29 61
SINCE SEP 1 45 74 -29 61
SINCE JAN 1 802 774 28 871
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 10 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION N (350)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 11.5
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.1
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 68 500 AM
LOWEST 29 600 PM
AVERAGE 49
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 97 1983
MINIMUM TEMPERATURE (F) 57 42 1929
1964
1979
SUNRISE AND SUNSET
SEPTEMBER 20 2025.....SUNRISE 630 AM EDT SUNSET 644 PM EDT
SEPTEMBER 21 2025.....SUNRISE 631 AM EDT SUNSET 643 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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