National Weather Service Text Product
AFOS product CLIBOS
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLIBOS
Product Timestamp: 2025-05-20 05:42 UTC
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743
CDUS41 KBOX 200542
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
142 AM EDT TUE MAY 20 2025
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR MAY 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 64 410 PM 90 1949 67 -3 57
1986
2017
MINIMUM 50 1159 PM 38 1882 51 -1 51
AVERAGE 57 59 -2 54
PRECIPITATION (IN)
YESTERDAY 0.00 1.55 1900 0.10 -0.10 0.08
MONTH TO DATE 3.35 1.92 1.43 2.72
SINCE MAR 1 10.58 9.72 0.86 14.62
SINCE JAN 1 15.89 16.32 -0.43 22.91
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 MAR 1 T 10.6 -10.6 0.1
SINCE JUL 1 28.1 49.2 -21.1 9.8
DEGREE DAYS
HEATING
YESTERDAY 8 7 1 11
MONTH TO DATE 99 168 -69 183
SINCE MAR 1 1218 1492 -274 1364
SINCE JUL 1 4977 5430 -453 4849
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 16 11 5 0
SINCE MAR 1 22 15 7 0
SINCE JAN 1 22 15 7 0
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 19 RESULTANT WIND DIRECTION NW (310)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 42 HIGHEST GUST DIRECTION NW (320)
AVERAGE WIND SPEED 20.0
SKY COVER
POSSIBLE SUNSHINE MM
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 69 1200 AM
LOWEST 45 100 PM
AVERAGE 57
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 68 91 1996
MINIMUM TEMPERATURE (F) 51 40 1892
SUNRISE AND SUNSET
MAY 20 2025...........SUNRISE 518 AM EDT SUNSET 804 PM EDT
MAY 21 2025...........SUNRISE 517 AM EDT SUNSET 805 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$