Thursday, December 25, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, DECEMBER 25, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET: 1617E
A FEW MOOD SNOWFLAKES THIS MORNING, OTHERWISE A MAINLY CLOUDY
AND BRISK CHRISTMAS DAY HERE ON BLUE HILL….
Clouds have dominated the sky most of today with some clearing
just starting to take place by the 1pm observation. There has
been a lot of virga observed this morning as well. A few flakes
did make it to the surface for a time during the mid morning
hours, giving us yet another trace. Today will be the 12th day
this month with at least a trace of frozen precipitation, of
those, only 3 have featured measurable amounts, albeit small
amounts. Snowfall is running nearly 6″ below normal for the
month to date.
Temperatures are running below normal, at least through early
this afternoon. Readings have only reached the mid 30s to this
point. Dew point values were rising a bit this morning from the
low 20s to the mid 20s, but have leveled off since.
The wind continues to be a factor today. A southwesterly flow
early this morning has shifted more to the west by early this
afternoon. The average speed for the day so far is around 11mph.
It’s been gusty at times, generally reaching 25-30mph. The peak
gust so far is 30mph, occurring just before 9:15am this morning.
Visibility has been somewhat limited due to haziness. We started
the day with a view of only around 25-30 miles, but it has
improved to around 40-50 miles after the front passed through.
The maximum temperature so far today is 37F degrees, which is
1 degree below the normal high of 38F. The minimum temperature
since midnight is 23F degrees, which is 1 degree above the
normal low of 22F.
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Today’s Observations:
7 A.M.
Weather: Overcast nimbostratus, few breaks in overcast distant E-SSE,
few stratocumulus offshore distant ENE-SSE, virga all quadrants
Temperature: 27F; Dew Point: 21F; Relative Humidity: 77%
Wind: SSW @ 10G19 kts
Sea-level pressure: 1015.3 mb; 29.98 in. Hg: falling rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 27F
6-hr Min temp: 23F
24-hr Precip: 0.01 inches
24-hr Snowfall: Trace
Snow Depth: 1 inch
BHO SA 1155 E110 OVC 30 153/27/21/2110G19/998/ FEW BINOVC DSNT E-SSE
FEW SC OFFSHR DSNT ENE-SSE VIRGA ALQDS PRESFR HAZY TOTAL NEW SNW PST
24 HRS TRACE/ 8/52/ 4/001 58053 70001 10027 20023
10 A.M.
Weather: Overcast nimbostratus, few stratocumulus distant E-S-SW,
virga all quadrants
Temperature: 31F; Dew Point: 26F; Relative Humidity: 83%
Wind: WSW @ 11G17 kts
Sea-level pressure: 1012.5 mb; 29.90 in. Hg: falling, then more slowly
Visibility: 50 miles
3-hr Precip: Trace
3-hr Snowfall: Trace
BHO SA 1455 E150 OVC 50 125/31/26/2511G17/990/ FEW SC DSNT E-S-SW
FEW LWR ACSL ALQDS VIRGA ALQDS TOTAL NEW SNW PST 3 HRS TRACE/
8/57/ 56028 6000/
1 P.M.
Weather: Scattered altocumulus, scattered altostratus,
few stratocumulus distant W-NNW
Temperature: 37F; Dew Point: 27F; Relative Humidity: 65%
Wind: W @ 12G18 kts
Sea-level pressure: 1007.9 mb; 29.76 in. Hg: falling, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 37F
6-hr Min temp: 27F
6-hr Precip: Trace
6-hr Snowfall: Trace
Snow Depth: 1 inch
BHO SA 1755 75 SCT 95 SCT 40 079/37/27/2712G18/976/
FEW SC DSNT W-NNW HAZY TOTAL NEW SNW PST 6 HRS TRACE/
8/570 4/001 56046 6000/ 10037 20027
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SUMMARY FOR WEDNESDAY, DECEMBER 24, 2025
TEMPERATURE (DEGREES F)
MAX…….36 NORMAL…..38
MIN…….24 NORMAL…..23
MEAN……30 NORMAL…..30
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………..0
TOTAL DEPARTURE FOR THE MONTH………………………-89 [-3.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….35 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………845 DEPARTURE…….+88
TOTAL HEATING UNITS FOR THE SEASON………….1962 DEPARTURE……..+2
TOTAL HEATING UNITS LAST SEASON TO DATE……..1747 DEPARTURE……+215
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)………..50 NNW @ 09:23 A.M.
VECTOR #1 (1-Sec)……….49 NNW @ 10:14 A.M.
VECTOR #2 (1-Sec)……….50 NW @ 09:36 A.M.
DAVIS #1……………….47 NNW @ 09:23 A.M.
DAVIS #2 ………………45 NNW @ 09:36 A.M.
RMY #1 (Instantaneous)…..52 NNW @ 10:14 A.M.
RMY #2 (Instantaneous)…..51 NW @ 09:36 A.M.
MERLIN…………………43 NNW
RICHARDS (C5C) (Inst)……49 NNW @ 09:38 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………33 NNW @ 09:38 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32 NW @ 09:37 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30 NNW @ 10:34 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………33 NW @ 09:37 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………31 N @ 10:35 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..32 NW @ 09:37 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..30 NNW @ 10:34 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………32 NW @ 09:37 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.2 NNW [317 total miles]
VECTOR #1………………13.1
VECTOR #2………………13.4
DAVIS #1……………….13.2 NW
DAVIS #2……………….13.1 NNW
RMY #1…………………12.6 NW
RMY #2…………………13.1 NW
RICHARDS (C5C)………….13.2
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH…………..1.88 DEPARTURE…..-2.38
TOTAL PRECIPITATION FOR THE YEAR (2025)…….46.34 DEPARTURE…..-6.39
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE…..-0.5
TOTAL SNOWFALL FOR THE MONTH………………..3.2 DEPARTURE…..-5.8
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….3.3 DEPARTURE…..-8.2
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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/0.0/547/98 37 WNW VEC1 37 WNW RMY 38
12/2 36/27/32/-5/0.85/T/000/00 38 N VEC1 38 NNE RMY 38
12/3 37/27/32/-4/0.06/0.6/423/76 28 NW VEC1 29 NNW RMY 30
12/4 38/15/27/-9/T/T/255/46 60 NW VEC1 59 WNW RMY 61
12/5 25/8/17/-19/T/T/510/92 30 NW VEC1 30 NW RMY 30
12/6 39/25/32/-3/T/T/122/22 21 W VEC1 21 W RMY 22
12/7 39/27/33/-2/0.00/0.0/248/45 24 W VEC1 24 W RMY 24
12/8 31/12/22/-13/T/T/457/83 43 NW VEC1 43 NW RMY 44
12/9 28/9/19/-15/0.00/0.0/452/82 33 SSW VEC1 33 SSW RMY 33
12/10 46/28/37/+3/0.04/T/187/34 50 SSW VEC1 50 SSW RMY 51
12/11 37/21/29/-5/0.00/0.0/450/82 51 WNW VEC1 51 WNW RMY 53
12/12 33/18/26/-8/0.00/0.0/532/97 41 W VEC1 41 W RMY 42
12/13 34/23/29/-4/0.00/0.0/038/07 28 SW VEC1 28 SW RMY 31
12/14 31/15/23/-10/0.13/1.8/000/00 39 NNW VEC1 39 NNW RMY 40
12/15 23/10/17/-16/0.00/0.0/496/91 40 NW VEC1 40 NW RMY 42
12/16 36/19/28/-4/0.00/0.0/437/80 29 SW VEC1 29 SW RMY 30
12/17 45/25/35/+3/0.00/0.0/196/36 43 SW VEC1 42 SW RMY 43
12/18 47/32/40/+8/0.00/0.0/539/99 32 S VEC1 32 S RMY 34
12/19 58/32/45/+13/0.60/T/000/00 79 S VEC1 79 S RMY 81
12/20 36/27/32/+1/0.00/0.0/446/82 46 WNW VEC1 46 WNW RMY 45
12/21 45/28/37/+6/0.00/0.0/480/88 46 SSW VEC1 46 SSW RMY 46
12/22 31/22/27/-4/0.00/0.0/539/99 44 NW VEC1 44 NW RMY 44
12/23 35/26/31/0/0.19/0.8/000/00 20 SE VEC1 18 SSE RMY 19
12/24 36/24/30/0/0.03/T/180/33 50 NNW VEC1 49 NNW RMY 52
12/25 The low since midnight is 23F, the daily normal low is 22F.
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DECEMBER DAILY RECORDS TO DATE
12/19 PEAK GUST OF 79 MPH S,
BEAT THE OLD RECORD OF 68 MPH NE IN 1986.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR DECEMBER 25
HIGH 64 IN 2015
LOW -11 IN 1980
PRECIP 2.15 INS. IN 2020
SNOWFALL 8.5 INS. IN 2002
PEAK GUST 80 MPH NW IN 1971
RECORDS FOR DECEMBER 26
HIGH 58 IN 1973,1982
LOW -12 IN 1980
PRECIP 3.64 INS. IN 1969
SNOWFALL 17.5 INS. IN 1909
PEAK GUST 84 MPH SSE IN 1957
TODAY’S REPORT PREPARED BY: Matt Douglas
