Wednesday, December 3, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

WEDNESDAY, DECEMBER 3, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0656E
SUNSET:  1612E

FIRST WINTER STORM OF THE SEASON BRINGS A GOOD DOSE OF RAIN AND
SOME ACCUMULATING SNOW….

The region’s first winter storm of the season arrived yesterday
morning bringing mainly rain to Blue Hill, but it did change to
a period of snow late last night leaving 0.6″ of accumulation on
the summit. Total liquid precipitation for the event was 0.91″,
so it was a very good dose of water. Despite this, we are still
running a 3.45″ deficit for the year.

Today is featuring much better weather with sunshine mixed with
increasing clouds.

Temperatures are still on the cold side however with readings
rising from the upper 20s early this morning to the mid 30s by
early this afternoon. This is still below normal for early
December. Dew point values are holding in the mid to mid to
upper 20s, adding to the chilly feel of the air.

The wind has been generally northwesterly today. It was stronger
during the predawn hours, but has been decreasing as the day
progresses. The average speed for the day so far is around 13mph.
The peak gust for the day so far is 29mph, which occurred just
before 5am this morning.

Visibility was around 40 miles early this morning, but has
improved to around 60 miles.

The maximum temperature so far today is 37F degrees, which is
7 degrees below the normal high of 44F. The minimum temperature
since midnight is 28F degrees, which is 1 degree below the
normal low of 29F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, few lower stratocumulus all quadrants
Temperature: 28F; Dew Point: 27F; Relative Humidity: 95%
Wind: NW @ 13G18 kts
Sea-level pressure: 1011.9 mb; 29.88 in. Hg: rising, then more slowly
Visibility: 40 miles
6-hr Max temp: 31F
6-hr Min temp: 28F
24-hr Precip: 0.91 inches
24-hr Snowfall: 0.6 inches
BHO SA 1155 E24 BKN 40 119/28/27/3213G18/988/ FEW LWR SC ALQDS
TOTAL NEW SNW PST 24HRS 0.6 INS/ 8/500 4/001 51044 6003/ 70091
10031 20028

10 A.M.
Weather: Scattered cirrus, few stratocumulus all quadrants
Temperature: 31F; Dew Point: 27F; Relative Humidity: 86%
Wind: NNW @ 13 kts
Sea-level pressure: 1015.5 mb; 29.99 in. Hg: rising, then more rapidly
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 250 SCT 60 155/31/27/3313/999/ FEW SC ALQDS/ 8/501 53036

1 P.M.
Weather: Broken cirrus, few stratocumulus all quadrants
Temperature: 36F; Dew Point: 27F; Relative Humidity: 70%
Wind: NW @ 5 kts, wind light
Sea-level pressure: 1015.8 mb; 30.00 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 37F
6-hr Min temp: 28F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
BHO SA 1755 E250 BKN 60 158/36/27/3105/000/ FEW SC ALQDS WND LGT/
8/501 53003 10037 20028

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SUMMARY FOR SUNDAY, DECEMBER 2, 2025

TEMPERATURE (DEGREES F)
MAX…….36   NORMAL…..44
MIN…….27   NORMAL…..29
MEAN……32   NORMAL…..37

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH……………………….-7 [-3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….33  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………….63  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE SEASON………….1180  DEPARTURE…….-80
TOTAL HEATING UNITS LAST SEASON TO DATE……..1013  DEPARTURE……+167

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)………..38 N    @   09:47 P.M.
VECTOR #1 (1-Sec)……….38 NNE  @   08:05 P.M.
VECTOR #2 (1-Sec)……….40 N    @   08:53 P.M.
DAVIS #1……………….36 NE   @   08:05 P.M.
DAVIS #2 ………………35 NE   @   08:05 P.M.
RMY #1 (Instantaneous)…..38 N    @   09:47 P.M.
RMY #2 (Instantaneous)…..40 N    @   08:53 P.M.
MERLIN…………………37 N
RICHARDS (C5C) (Inst)……37 N    @   09:47 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 NNE  @   08:04 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 NNE  @   08:05 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..26 NNE  @   08:05 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 NNE  @   08:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 NNE  @   08:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..23 NNE  @   08:05 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 NNE  @   08:05 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………24 NNE  @   08:05 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.5 SE [299 total miles] VECTOR #1………………12.3
VECTOR #2………………13.2
DAVIS #1……………….12.5 ENE
DAVIS #2……………….12.8 ENE
RMY #1…………………12.1 ENE
RMY #2…………………13.0 ENE
RICHARDS (C5C)………….12.5

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.91 DEPARTURE…..+0.74
TOTAL PRECIPITATION FOR THE MONTH…………..0.91 DEPARTURE…..+0.56
TOTAL PRECIPITATION FOR THE YEAR (2025)…….45.37 DEPARTURE…..-3.45

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.6 DEPARTURE…..+0.4
TOTAL SNOWFALL FOR THE MONTH………………..0.6 DEPARTURE…..+0.2
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.7 DEPARTURE…..-2.2

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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/…/..           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 The low since midnight is 28F, the daily normal low is 29F.

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DECEMBER 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 DECEMBER 3
HIGH 67 IN 2009
LOW  -1 IN 1890
PRECIP 2.10 INS. IN 1986
SNOWFALL 6.0 INS. IN 1963
PEAK GUST 73e MPH W IN 1942

RECORDS FOR DECEMBER 4
HIGH 67 IN 1998
LOW -4 IN 1940
PRECIP 1.87 INS. IN 1968
SNOWFALL 6.0 INS. IN 1907
PEAK GUST 73 MPH WNW IN 1980

TODAY’S REPORT PREPARED BY: Matt Douglas