660
CDUS41 KBOX 120619
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
219 AM EDT TUE MAY 12 2026
...............................
..THE BOSTON MA CLIMATE SUMMARY FOR MAY 11 2026
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 62 237 PM 91 1993 65 -3 70
MINIMUM 49 1159 PM 33 1900 49 0 53
AVERAGE 56 57 -1 62
PRECIPITATION (IN)
YESTERDAY T 1.42 1989 0.10 -0.10 0.00
MONTH TO DATE 0.58 1.15 -0.57 3.00
SINCE MAR 1 5.69 8.95 -3.26 10.23
SINCE JAN 1 8.98 15.55 -6.57 15.54
SNOWFALL (IN)
YESTERDAY 0.0 T 1945 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE MAR 1 1.9 10.6 -8.7 T
SINCE JUL 1 62.8 49.2 13.6 28.1
DEGREE DAYS
HEATING
YESTERDAY 9 8 1 3
MONTH TO DATE 87 108 -21 68
SINCE MAR 1 1302 1432 -130 1187
SINCE JUL 1 5429 5370 59 4946
COOLING
YESTERDAY 0 1 -1 0
MONTH TO DATE 0 3 -3 6
SINCE MAR 1 3 7 -4 12
SINCE JAN 1 3 7 -4 12
...............................................................
WIND (MPH)
RESULTANT WIND SPEED 5 RESULTANT WIND DIRECTION N (340)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION NW (320)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 8.4
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 71 800 PM
LOWEST 24 100 PM
AVERAGE 48
......................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 65 88 1991
2001
MINIMUM TEMPERATURE (F) 49 33 1907
SUNRISE AND SUNSET
MAY 12 2026...........SUNRISE 526 AM EDT SUNSET 756 PM EDT
MAY 13 2026...........SUNRISE 525 AM EDT SUNSET 757 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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