577
CDUS41 KBOX 180531
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
131 AM EDT THU SEP 18 2025
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 17 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 70 116 PM 91 1915 73 -3 77
MINIMUM 56 326 AM 44 2013 58 -2 57
AVERAGE 63 65 -2 67
PRECIPITATION (IN)
YESTERDAY 0.01 2.77 1995 0.13 -0.12 0.00
MONTH TO DATE 1.44 1.90 -0.46 T
SINCE SEP 1 1.44 1.90 -0.46 T
SINCE JAN 1 26.39 29.94 -3.55 34.14
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 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
YESTERDAY 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)
RESULTANT WIND SPEED 7 RESULTANT WIND DIRECTION NE (50)
HIGHEST WIND SPEED 14 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION NE (50)
AVERAGE WIND SPEED 7.7
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 800 PM
LOWEST 76 100 PM
AVERAGE 85
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 72 90 1891
1906
1955
MINIMUM TEMPERATURE (F) 58 43 1875
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 627 AM EDT SUNSET 648 PM EDT
SEPTEMBER 19 2025.....SUNRISE 629 AM EDT SUNSET 646 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page