Sunday, December 7, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, DECEMBER 7, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0700E
SUNSET: 1612E
CLOUDS INCREASE WITH BELOW NORMAL TEMPERATURES CONTINUING….
Despite the arctic air mass having moved out of the region
yesterday, below normal temperatures still remain across the
region. We started the day with some sunshine, but clouds have
since overspread the area leaving us with overcast skies this
afternoon. With the lack of sun, the air is quite chilly,
reminding us that we are indeed in winter!
Temperatures today are very similar to the values of yesterday.
Morning readings in the upper 20s have recovered to the mid to
upper 30s by early this afternoon. Dew point readings have been
holding in the mid 20s today, indicating dry polar air which is
adding to the chilly feel.
Winds have generally been on the light side today, which is a
welcomed change especially with the cold temperatures in place.
The average speed for the day so far is around 7mph. The peak
gust so far for the day is 17mph, which occurred around 1:30am
this morning.
Visibility has been consistent at around 30-40 miles throughout
the day.
The maximum temperature so far today is 39F degrees, which is
4 degrees below the normal high of 43F. The minimum temperature
since midnight is 27F degrees, which is equal to the normal low
of 27F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, scattered cirrus
Temperature: 29F; Dew Point: 25F; Relative Humidity: 86%
Wind: WNW @ 7 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: rising, then more rapidly
Visibility: 30 miles, thin fog
6-hr Max temp: 29F
6-hr Min temp: 27F
24-hr Precip: Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 35 SCT 250 SCT 30 179/29/25/2907/006/ THN F ALQDS/
8/501 53013 70000 10029 20027
10 A.M.
Weather: Thin broken cirrus, few stratocumulus distant SW-NW-NE-ESE
Temperature: 37F; Dew Point: 24F; Relative Humidity: 58%
Wind: WNW @ 3 kts, wind light
Sea-level pressure: 1019.4 mb; 30.10 in. Hg: rising unsteadily
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 -BKN 30 194/37/24/3003/010/ FEW SC DSNT SW-NW-NE-ESE
HAZY WND LGT/ 8/501 52015
1 P.M.
Weather: Overcast stratocumulus, few breaks in overcast NE-SE-SW
Temperature: 37F; Dew Point: 24F; Relative Humidity: 57%
Wind: W @ 2 kts, wind light and variable
Sea-level pressure: 1018.2 mb; 30.07 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 39F
6-hr Min temp: 29F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E40 OVC 40 182/37/24/2702/007/ FEW BINOVC DSNT
NE-SE-SW HIER CLDS VSBL DSNT NE-ESE HAZY WND L/V/ 8/5//
58012 10039 20029
————————————————————–
SUMMARY FOR SATURDAY, DECEMBER 6, 2025
TEMPERATURE (DEGREES F)
MAX…….39 NORMAL…..43
MIN…….25 NORMAL…..28
MEAN……32 NORMAL…..35
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-3
TOTAL DEPARTURE FOR THE MONTH………………………-42 [-7.2 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….33 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH……………215 DEPARTURE…….+41
TOTAL HEATING UNITS FOR THE SEASON………….1332 DEPARTURE…….-45
TOTAL HEATING UNITS LAST SEASON TO DATE……..1153 DEPARTURE……+179
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)………..21 W @ 08:53 P.M.
VECTOR #1 (1-Sec)……….21 W @ 07:59 P.M.
VECTOR #2 (1-Sec)……….21 WSW @ 06:44 P.M.
DAVIS #1……………….20 WSW @ 07:07 P.M.
DAVIS #2 ………………25 S @ 08:16 A.M.
RMY #1 (Instantaneous)…..22 W @ 07:19 P.M.
RMY #2 (Instantaneous)…..22 SSE @ 09:39 A.M.
MERLIN…………………20 WSW
RICHARDS (C5C) (Inst)……21 W @ 07:59 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 W @ 07:32 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 SSE @ 09:28 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 SSE @ 09:33 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 W @ 07:38 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 S @ 08:08 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 SSE @ 09:33 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 SSE @ 08:24 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 SSE @ 09:37 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.5 SSE [227 total miles]
VECTOR #1……………….9.9
VECTOR #2………………10.5
DAVIS #1………………..9.6 SSW
DAVIS #2………………..9.8 SSW
RMY #1………………….9.6 SSW
RMY #2…………………10.5 SSW
RICHARDS (C5C)…………..9.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.91 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE YEAR (2025)…….45.37 DEPARTURE…..-4.17
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.3
TOTAL SNOWFALL FOR THE MONTH………………..0.6 DEPARTURE…..-0.9
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.7 DEPARTURE…..-3.3
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR DECEMBER 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
12/1 42/27/35/-2/T/0.0/…/.. 37 WNW VEC1 37 WNW RMY 38
12/2 36/27/32/-5/0.85/T/…/.. 38 N VEC1 38 NNE RMY 38
12/3 37/27/32/-4/0.06/0.6/…/.. 28 NW VEC1 29 NNW RMY 30
12/4 38/15/27/-9/T/T/…/.. 60 NW VEC1 59 WNW RMY 61
12/5 25/8/17/-19/T/T/…/.. 30 NW VEC1 30 NW RMY 30
12/6 39/25/32/-3/T/T/…/.. 21 W VEC1 21 W RMY 22
12/7 The low since midnight is 27F, the daily normal low is 27F.
————————————————————–
DECEMBER DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 7
HIGH 74 IN 1998
LOW 6 IN 1906
PRECIP 1.67 INS. IN 1953
SNOWFALL 6.3 INS. IN 2003
PEAK GUST 76e SE IN 1976
RECORDS FOR DECEMBER 8
HIGH 62 IN 1966
LOW -4 IN 1906
PRECIP 1.54 INS. IN 1969
SNOWFALL 2.5 INS. IN 2001
PEAK GUST 78e W IN 1979
TODAY’S REPORT PREPARED BY: Matt Douglas
