Climatological Report (Daily)
Issued by NWS Boston, MA
Issued by NWS Boston, MA
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
346
CDUS41 KBOX 210531
CLIBOS
CLIMATE REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
131 AM EDT SUN SEP 21 2025
...................................
...THE BOSTON MA CLIMATE SUMMARY FOR SEPTEMBER 20 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 65 228 PM 97 1983 72 -7 65
MINIMUM 54 603 AM 42 1929 57 -3 59
1964
1979
AVERAGE 60 64 -4 62
PRECIPITATION (IN)
YESTERDAY 0.00 2.82 1899 0.13 -0.13 0.05
MONTH TO DATE 1.55 2.28 -0.73 0.06
SINCE SEP 1 1.55 2.28 -0.73 0.06
SINCE JAN 1 26.50 30.32 -3.82 34.20
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 5 3 2 3
MONTH TO DATE 23 28 -5 4
SINCE SEP 1 23 28 -5 4
SINCE JUL 1 30 37 -7 6
COOLING
YESTERDAY 0 2 -2 0
MONTH TO DATE 45 76 -31 61
SINCE SEP 1 45 76 -31 61
SINCE JAN 1 802 776 26 871
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 4 RESULTANT WIND DIRECTION E (70)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION E (110)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION E (100)
AVERAGE WIND SPEED 8.1
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 69 600 AM
LOWEST 45 1200 PM
AVERAGE 57
..........................................................
THE BOSTON MA CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 94 1895
MINIMUM TEMPERATURE (F) 56 40 1904
1929
SUNRISE AND SUNSET
SEPTEMBER 21 2025.....SUNRISE 631 AM EDT SUNSET 643 PM EDT
SEPTEMBER 22 2025.....SUNRISE 632 AM EDT SUNSET 641 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$