Friday, January 2, 2026

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

FRIDAY, JANUARY 2, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0713E
SUNSET: 1623E

SKIES CLEARING BY MID MORNING WITH CONTINUED BELOW NORMAL
TEMPERATURES….

We started the day under overcast conditions but clearing began
during the mid morning hours. By the afternoon we had thinly
scattered skies with plenty of bright sunshine and blue skies.

Temperatures were in the lower teens during the overnight and
early morning, and have ‘recovered’ to the mid 20’s, which is
still about 11 degrees below normal. Wind chills this morning
were in the negative and single digits and have improved to
the teens as of this afternoon. Dew points have remained in the
single digits throughout the day today, contributing to the
persisting chill in the air.

The wind has been a bit lighter today compared to yesterday, but
we have still had a decent flow out of the west-southwest for
much of the day. The average speed for the day so far is around
11mph. The peak gust so far is 26mph, which occurred just after
12:30am this morning.

Visibility has hovered between 50-60 miles today, with the best
viewing during the early morning hours.

The maximum temperature so far today is 25F degrees, which is
11 degrees below the normal high of 36F. The minimum temperature
since midnight is 12F degrees, which is 9 degrees below the normal
low of 21F.

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PRELIMINARY STATS FOR DECEMBER 2025

TEMPERATURE, Deg. F
Avg. Max. 36.0 [-4.2] Avg. Min. 20.9 [-4.0] Mean 28.5 [-4.0] 24-hour corrected mean: 28.9
Max. for month: 58F on the 19th
Min. for month: 8F on the 5th, 26th

HEATING DEGREE DAYS
Total heating units: 1123 [+117] Total for the season: 2240 [+030] Total for last season: 1932

COOLING DEGREE DAYS
Total cooling units: 0 [+000] Total for the season: 756 [+079] Total for last season: 768

PRECIPITATION, Inches
Total: 2.73 [-2.66] Greatest in 24 hrs: 0.91 on the 2nd-3rd

SNOWFALL, Inches
Total: 6.8 [-5.8] Greatest in 24 hrs: 3.6 on the 26th-27th

WIND, mph
Avg. uncorrected wind speed: 13.4 mph
Avg. corrected wind speed: 13.7 mph
Prevailing wind direction: West [16%] Peak gust and direction: 79 S on the 19th

SUNSHINE:
Campbell-Stokes card minutes: 9000 of a possible 16470, or 55%
Astronomical total minutes: 9304 of a possible 16998 or 55%

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Today’s Observations:

7 A.M.
Weather: Overcast altocumulus, few stratocumulus distant NE-E
Temperature: 14F; Dew Point: 6F; Relative Humidity: 71%
Wind: WSW @ 9 kts
Sea-level pressure: 1007.2 mb; 29.74 in. Hg: falling, then
steady
Visibility: 60 miles
6-hr Max temp: 14F
6-hr Min temp: 12F
24-hr Precip: 0.15 inches
24-hr Snowfall: 2.2 inches
Snow Depth: 2 inches
BHO SA 1155 E110 OVC 60 072/14/6/2609/974/ FEW SC DSNT NE-E
TOTAL NEW SNW PST 24 HRS 2.2 INS/ 8/55/ 4/002 56010 70015
10014 20012

10 A.M.
Weather: Scattered altocumulus, few stratocumulus distant
NE-E and WSW-W
Temperature: 18F; Dew Point: 8F; Relative Humidity: 63%
Wind: WSW @ 8 kts
Sea-level pressure: 1007.4 mb; 29.75 in. Hg: steady, then
rising
Visibility: 50 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 100 SCT 50 074/18/8/2508/975/ FEW SC DSNT NE-E
AND WSW-W/ 8/550 53002

1 P.M.
Weather: Thinly scattered stratocumulus, few altocumulus ESE-SSW
Temperature: 25F; Dew Point: 9F; Relative Humidity: 50%
Wind: W @ 8 kts
Sea-level pressure: 1004.8 mb; 29.67 in. Hg: falling, then
more rapidly
Visibility: 50 miles
6-hr Max temp: 25F
6-hr Min temp: 14F
6-hr Precip: 0.0 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 2 inches
BHO SA 1755 50 SCT 50 048/25/9/2708/967/ FEW AC ESE-SSW/
8/550 4/002 58026 10025 20014

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SUMMARY FOR THURSDAY, JANUARY 1, 2026

TEMPERATURE (DEGREES F)
MAX…….29 NORMAL…..36
MIN…….11 NORMAL…..21
MEAN……20 NORMAL…..29

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-9
TOTAL DEPARTURE FOR THE MONTH……………………….-9 [-9.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….45 DEPARTURE……..+8
TOTAL HEATING UNITS FOR THE MONTH…………….45 DEPARTURE……..+9
TOTAL HEATING UNITS FOR THE SEASON………….2285 DEPARTURE…….+39
TOTAL HEATING UNITS LAST SEASON TO DATE……..1955 DEPARTURE……+330

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)………..43 NW @ 08:52 A.M.
VECTOR #1 (1-Sec)……….43 NW @ 08:52 A.M.
VECTOR #2 (1-Sec)……….43 NW @ 08:52 A.M.
DAVIS #1……………….40 W @ 05:56 P.M.
DAVIS #2 ………………38 NW @ 08:52 A.M.
RMY #1 (Instantaneous)…..42 WNW @ 07:38 P.M.
RMY #2 (Instantaneous)…..45 NW @ 08:52 A.M.
MERLIN…………………37 NW
RICHARDS (C5C) (Inst)……41 WNW @ 09:40 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………30 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..27 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..30 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………28 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………29 WNW @ 07:40 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..27 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..29 NW @ 08:53 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26 NW @ 08:53 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..17.0 WNW [407 total miles] VECTOR #1………………16.4
VECTOR #2………………17.7
DAVIS #1……………….17.0 W
DAVIS #2……………….17.5 WNW
RMY #1…………………15.8 W
RMY #2…………………17.4 WSW
RICHARDS (C5C)………….16.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.11 DEPARTURE…..-0.04
TOTAL PRECIPITATION FOR THE MONTH (DEC)……..0.15 DEPARTURE……0.00
TOTAL PRECIPITATION FOR THE YEAR (2025)……..0.15 DEPARTURE……0.00

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..2.2 DEPARTURE…..+1.6
TOTAL SNOWFALL FOR THE MONTH (DEC)…………..2.7 DEPARTURE…..+2.1
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….9.6 DEPARTURE…..-6.1

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PRELIMINARY CLIMATE SUMMARY FOR JANUARY 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

1/1 29/11/20/-9/0.15/2.7/…/.. 43 NW VEC1 43 NW RMY 42

1/2 The low since midnight is 12F, the daily normal low is 21F.

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JANUARY DAILY RECORDS TO DATE

NONE.

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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 38/16/27/-3/T/T/071/13 55 NNW VEC1 55 NNW RMY 60
12/26 21/8/15/-15/0.09/1.4/393/72 33 NNW VEC1 33 NNW RMY 34
12/27 25/14/20/-10/0.14/2.2/245/45 23 N VEC1 23 N RMY 24
12/28 36/14/25/-4/0.04/0.0/453/83 26 SSW VEC1 26 SSW RMY 26
12/29 47/29/38/+9/0.58/T/000/00 53 W VEC1 50 W RMY 53
12/30 29/20/25/-4/0.00/0.0/279/51 59 WNW VEC1 59 WNW RMY 63
12/31 32/21/27/-2/0.00/0.0/329/60 37 W VEC1 37 W RMY 39