Monday, December 8, 2025

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

MONDAY, DECEMBER 8, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0701E
SUNSET:  1611E

ARCTIC FRONT USHERS IN FRIGID TEMPERATURES AND BLUSTERY NORTHWEST
WINDS….

An arctic front pushed through the area early this morning
accompanied by some snow showers and a gusty northwest wind.
Despite having a decent amount of sunshine today, temperatures
have struggled to rise much since dropping into the low 20s
early this morning.

The high temperature for the day occurred at midnight which
was 31F degrees, readings have been all downhill from there.
We dropped to 20F after 7am this morning, and have only recovered
to the mid 20s early this afternoon. For reference, the normal
high for today should be 42F degrees. Dew point values have been
dropping through the day as well, reaching below zero early this
afternoon.

Winds have been on the gusty side most of the day out of the
northwest and north-northwest. The average speed for the day so
far is around 16mph. The peak gust so far for the day is 43mph,
which occurred at 5:07am this morning.

Visibility has increased from around 50 miles early this morning
to around 80 miles early this afternoon.

The maximum temperature so far today is 31F degrees, which is
9 degrees below the normal high of 42F. The minimum temperature
since midnight is 20F degrees, which is 7 degrees below the
normal low of 27F.

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Today’s Observations:

7 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant all quadrants,
few lower cirrus distant SE-SSW
Temperature: 21F; Dew Point: 6F; Relative Humidity: 51%
Wind: NW @ 14G24 kts, peak wind NNW 35mph at 6:41 A.M.
Sea-level pressure: 1021.1 mb; 30.15 in. Hg: rising rapidly
Visibility: 50 miles
6-hr Max temp: 30F
6-hr Min temp: 21F
24-hr Precip: Trace
24-hr Snowfall: Trace
Snow Depth: 0 inches
BHO SA 1155 300 -SCT 50 211/21/6/3214G24/015/ FEW SC DSNT ALQDS
FEW LWR CI DSNT SE-SSW PRESRR PK WND 3330/41/ 8/501 53041 70000
10030 20021

10 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant N-E-S
Temperature: 24F; Dew Point: 3F; Relative Humidity: 40%
Wind: NW @ 14G23 kts
Sea-level pressure: 1023.1 mb; 30.21 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 300 -SCT 70 231/24/3/3114G23/021/ FEW SC DSNT N-E-S/
8/501 51020

1 P.M.
Weather: Broken cirrus, few stratocumulus distant NE-SE
Temperature: 24F; Dew Point: 0F; Relative Humidity: 34%
Wind: NNW @ 10G26 kts, peak wind NW 32mph at 12:24 P.M.
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 25F
6-hr Min temp: 20F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E250 BKN 80 227/24/0/3410G26/020/ FEW SC DSNT NE-SE
PK WND 3228/24/ 8/501 56004 10025 20020

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SUMMARY FOR SUNDAY, DECEMBER 7, 2025

TEMPERATURE (DEGREES F)
MAX…….39   NORMAL…..43
MIN…….27   NORMAL…..27
MEAN……33   NORMAL…..35

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-2
TOTAL DEPARTURE FOR THE MONTH………………………-44 [-6.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….32  DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………247  DEPARTURE…….+43
TOTAL HEATING UNITS FOR THE SEASON………….1364  DEPARTURE…….-43
TOTAL HEATING UNITS LAST SEASON TO DATE……..1188  DEPARTURE……+176

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)………..24 W    @   11:33 P.M.
VECTOR #1 (1-Sec)……….24 W    @   11:33 P.M.
VECTOR #2 (1-Sec)……….23 WSW  @   11:29 P.M.
DAVIS #1……………….23 WSW  @   11:33 P.M.
DAVIS #2 ………………23 W    @   11:29 P.M.
RMY #1 (Instantaneous)…..24 W    @   11:33 P.M.
RMY #2 (Instantaneous)…..23 W    @   11:30 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……24 WSW  @   09:06 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 W    @   11:33 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 W    @   11:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 W    @   11:29 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 W    @   11:38 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 W    @   11:34 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 W    @   11:42 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 WSW  @   11:34 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 W    @   11:42 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.5 WNW [180 total miles] VECTOR #1……………….7.9
VECTOR #2……………….8.5
DAVIS #1………………..7.9 W
DAVIS #2………………..8.1 W
RMY #1………………….7.7 WSW
RMY #2………………….8.4 WSW
RICHARDS (C5C)…………..8.2

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…..-0.34
TOTAL PRECIPITATION FOR THE YEAR (2025)…….45.37 DEPARTURE…..-4.35

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE…..-0.3
TOTAL SNOWFALL FOR THE MONTH………………..0.6 DEPARTURE…..-1.2
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.7 DEPARTURE…..-3.6

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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 The low since midnight is 20F, the daily normal low is 27F.

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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 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

RECORDS FOR DECEMBER 9
HIGH 68 IN 1966
LOW -14 IN 1902
PRECIP 3.23 INS. IN 2014
SNOWFALL 10.8 INS. IN 2005
PEAK GUST 66 SE IN 1973

TODAY’S REPORT PREPARED BY: Matt Douglas