Wednesday, November 20, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, NOVEMBER 20, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0641E
SUNSET: 1618E
COOL AND CLOUDY WITH AFTERNOON SUN TODAY AT BLUE HILL….
While there has been some blue in the sky, thick cloud cover
has prevented the sun from making a prominent role in the day.
Still though, the winds have been light and the air mass is
still rather dry, so cool and cloudy has been the theme for at
least the first half of the day.
Temperatures remained below freezing from around midnight until
around 9am this morning. Our overnight low was 27F and because of
this extended time of below freezing temperatures, we had ice on
Ponkapoag Pond for a second morning in a row. Temperatures did
recover a bit, though the dense cloud cover kept the area from
reaching the expected normals (at least by 1pm). Dew point values
started in the lower 20’s and increased to the lower 30’s by the
early afternoon.
The wind was a bit more steady during the overnight and early
morning hours, averaging around 10mph out of the North. By the
midmorning, the wind shifted to a more easterly flow and winds
decreased rather sharply. The average speed for the day so far
is around 9mph. The peak gust for the day so far is 16mph,
which occurred just at 2:20am this morning.
Visibility has been great today, starting at around 80 miles
early this morning before fluctuating between 60-70 miles for
the remainder of the day.
The maximum temperature so far today is 45F degrees, which is
4 degrees below the normal high of 49F. The minimum temperature
since midnight is 27F degrees, which is 5 degrees below the
normal low of 32F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus, broken cirrus, few stratocumulus
N-ESE
Temperature: 28F; Dew Point: 22F; Relative Humidity: 78%
Wind: N @ 10 kts
Sea-level pressure: 1024.8 mb; 30.26 in. Hg: rising, then
more slowly
Visibility: 80 miles
6-hr Max temp: 29F
6-hr Min temp: 27F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
BHO SA 1155 E175 BKN 250 BKN 80 248/28/22/3510/026/ FEW SC
N-ESE/ 8/551 51006 10029 20027
10 A.M.
Weather: Scattered stratocumulus, scattered altocumulus,
broken cirrus
Temperature: 38F; Dew Point: 24F; Relative Humidity: 74%
Wind: Calm
Sea-level pressure: 1025.5 mb; 30.28 in. Hg: rising, then
more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 30 SCT 175 SCT 250 BKN 60 255/38/24/0000/028/
WND CALM 8/551 51007
1 P.M.
Weather: Scattered altocumulus, broken cirrus, few stratocumulus
all quadrants
Temperature: 43F Dew Point: 32F; Relative Humidity: 66%
Wind: E @ 10 kts
Sea-level pressure: 1023.3 mb; 30.22 in. Hg: falling, then more
rapidly
Visibility: 70 miles
6-hr Max temp: 44F
6-hr Min temp: 29F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
BHO SA 1755 175 SCT 250 BKN 70 233/43/32/0810/022/ FEW SC ALQDS/
8/551 58022 10045 20028
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SUMMARY FOR WEDNESDAY, NOVEMBER 19, 2025
TEMPERATURE (DEGREES F)
MAX…….44 NORMAL…..49
MIN…….27 NORMAL…..33
MEAN……36 NORMAL…..41
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………-25 [-1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….29 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH……………427 DEPARTURE…….+24
TOTAL HEATING UNITS FOR THE SEASON…………..838 DEPARTURE…….-77
TOTAL HEATING UNITS LAST SEASON TO DATE………679 DEPARTURE……+159
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE SEASON…………..756 DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………768 DEPARTURE…….-12
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all on Main Tower.
E=Estimated *=Last of multiple occurrences
F420C (Official)………..20 NNW @ 10:43 A.M.
VECTOR #1 (1-Sec)……….19 NW @ 11:04 A.M.
VECTOR #2 (1-Sec)……….20 NNW @ 10:43 A.M.
DAVIS #1……………….18 NW @ 10:43 A.M.
DAVIS #2 ………………18 NNW @ 10:43 A.M.
RMY #1 (Instantaneous)…..20 NNW @ 10:43 A.M.
RMY #2 (Instantaneous)…..20 NNW @ 10:43 A.M.
MERLIN…………………17 NW
RICHARDS (C5C) (Inst)……19 NNW @ 10:43 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 NNW @ 10:50 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 NNW @ 10:50 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 NW @ 10:39 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 NNW @ 10:45 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 NNW @ 10:39 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 NNW @ 10:50 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 NW @ 10:39 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 NNW @ 10:50 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.9 N [190 total miles]
VECTOR #1……………….8.5
VECTOR #2……………….9.0
DAVIS #1………………..8.6 NW
DAVIS #2………………..8.6 NNW
RMY #1………………….8.3 NW
RMY #2………………….8.9 NW
RICHARDS (C5C)…………..8.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.61 DEPARTURE…..-1.09
TOTAL PRECIPITATION FOR THE YEAR (2025)…….43.92 DEPARTURE…..-2.94
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE…..-0.6
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.1 DEPARTURE…..-1.3
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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
11/1 56/38/47/+0/0.00/0.0/619/100 50 W VEC1 50 W RMY 50
11/2 53/33/43/-4/0.00/0.0/617/100 23 WNW VEC1 23 WNW RMY 24
11/3 54/42/48/+2/0.16/0.0/012/02 41 WNW VEC1 41 W RMY 46
11/4 54/42/48/+2/0.00/0.0/605/99 52 NW VEC1 52 NW RMY 54
11/5 56/39/48/+2/0.06/0.0/091/15 50 W VEC1 47 W RMY 52
11/6 50/34/42/-3/0.02/T/449/74 48 WNW VEC1 48 WNW RMY 49
11/7 52/31/42/-3/0.04/0.0/448/74 43 SSW VEC1 42 SSW RMY 47
11/8 60/45/53/+8/0.18/0.0/307/51 32 WNW VEC1 33 WNW RMY 33
11/9 61/46/54/+10/0.15/0.0/216/36 33 ESE VEC1 34 ESE RMY 35
11/10 54/36/45/+1/0.44/0.0/000/00 32 W VEC1 31 W RMY 31
11/11 37/30/34/-9/T/T/131/22 46 WNW VEC1 44 WNW RMY 47
11/12 44/30/37/-6/T/T/148/25 32 W VEC1 32 W RMY 33
11/13 47/32/40/-3/T/0.0/071/12 32 NW VEC1 32 NW RMY 34
11/14 46/32/39/-3/0.00/0.0/495/84 30 NNW VEC1 30 NNW RMY 30
11/15 44/28/36/-6/0.37/0.1/522/89 26 SSE VEC1 26 SSE RMY 26
11/16 52/33/43/+1/0.19/T/280/48 50 NW VEC1 49 W RMY 53
11/17 41/29/35/-6/0.00/0.0/495/85 45 WNW VEC1 45 WNW RMY 46
11/18 46/30/38/-3/0.00/0.0/574/99 31 WNW VEC1 32 WNW RMY 33
11/19 44/27/36/-5/0.00/0.0/…/.. 20 NNW VEC1 19 NW RMY 20
11/20 The low since midnight is 27F, the daily normal low is 32F.
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NOVEMBER DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR NOVEMBER 20
HIGH 72 IN 1953
LOW 9 IN 1894
PRECIP 2.78 INS IN 1988
SNOWFALL 3.0 INS IN 1897
PEAK GUST 73e S IN 1950
RECORDS FOR NOVEMBER 21
HIGH 69 IN 1931
LOW 10 IN 1888
PRECIP 3.41 INCHES IN 1950
SNOWFALL 4.0 INS IN 1929
PEAK GUST 69 NW IN 1989
TODAY’S REPORT PREPARED BY: Amanda Joly
