Tuesday, January 13, 2026
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JANUARY 13, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET: 1635E
MAINLY SUNNY THIS MORNING, CLOUDS MOVING IN THIS AFTERNOON….
Today has been a decent day with plenty of sunshine this morning
save for a few mid level clouds that pushed through around sun
rise. However, high clouds are now pushing into the area early
this afternoon as our next weather system approaches the region.
Temperatures are running above normal today, as our January thaw
rolls on. Readings have reached the mid 40s by early this
afternoon, which feelS quite nice with the sun and gentle wind.
Dew point values have pushed into the 20s today.
The wind has been fairly steady out of the west-southwest today.
The average speed for the day so far is around 10mph. Occasionally
we’ll get gusts approaching 20mph, but overall the wind has been
fairly tolerable. The peak gust for the day so far is 20mph,
which occurred just before 11am this morning.
Visibility has been mediocre today due to haziness. The view has
been between 30-40 miles all day.
The maximum temperature so far today is 45F degrees, which is
10 grees above the normal high of 35F. The minimum temperature
since midnight is 28F degrees, which is 10 degrees above the
normal low of 18F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken altocumulus/castellanus, virga all quadrants
Temperature: 29F; Dew Point: 22F; Relative Humidity: 73%
Wind: WSW @ 9 kts
Sea-level pressure: 1017.4 mb; 30.04 in. Hg: falling, then rising
Visibility: 30 miles, hazy
6-hr Max temp: 30F
6-hr Min temp: 28F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E100 BKN 30 174/29/22/2509/004/ VIRGA ALQDS HAZY/
8/080 53003 10030 20028
10 A.M.
Weather: Clear
Temperature: 37F; Dew Point: 24F; Relative Humidity: 58%
Wind: WSW @ 7 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 40 179/37/24/2507/006/ HAZY/ 8/000 50005
1 P.M.
Weather: Broken cirrus
Temperature: 44F; Dew Point: 27F; Relative Humidity: 50%
Wind: SW @ 8G15 kts
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 45F
6-hr Min temp: 29F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E250 BKN 40 147/44/27/2308G15/996/ HAZY/ 8/001
58032 10045 20029
————————————————————–
SUMMARY FOR MONDAY, JANUARY 12, 2026
TEMPERATURE (DEGREES F)
MAX…….37 NORMAL…..35
MIN…….24 NORMAL…..19
MEAN……31 NORMAL…..27
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+23 [+1.7 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….34 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH……………426 DEPARTURE…….-25
TOTAL HEATING UNITS FOR THE SEASON………….2666 DEPARTURE……..+6
TOTAL HEATING UNITS LAST SEASON TO DATE……..2390 DEPARTURE……+276
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)………..47 WNW @ 12:26 A.M.
VECTOR #1 (1-Sec)……….46 WNW @ 12:25 A.M.
VECTOR #2 (1-Sec)……….50 W @ 12:25 A.M.
DAVIS #1……………….47 WNW @ 12:22 A.M.
DAVIS #2 ………………46 W @ 12:33 A.M.
RMY #1 (Instantaneous)…..47 WNW @ 12:26 A.M.
RMY #2 (Instantaneous)…..52 W @ 12:25 A.M.
MERLIN…………………44 W
RICHARDS (C5C) (Inst)……44 WNW @ 01:04 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………34 W @ 12:33 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..32 W @ 12:33 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..34 W @ 12:27 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………35 W @ 12:33 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………34 WNW @ 12:27 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..30 W @ 12:33 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..33 W @ 12:27 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………31 W @ 12:33 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..15.4 WNW [369 total miles]
VECTOR #1………………15.0
VECTOR #2………………15.9
DAVIS #1……………….15.7 W
DAVIS #2……………….15.8 W
RMY #1…………………14.3 W
RMY #2…………………15.5 W
RICHARDS (C5C)………….14.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH (JAN)……..0.96 DEPARTURE…..-0.85
TOTAL PRECIPITATION FOR THE YEAR (2026)……..0.96 DEPARTURE…..-0.85
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.5
TOTAL SNOWFALL FOR THE MONTH (JAN)…………..3.4 DEPARTURE…..-3.2
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……10.3 DEPARTURE….-11.4
————————————————————–
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/-9/0.15/2.7/264/48 43 NW VEC1 43 NW RMY 42
1/2 25/12/19/-9/0.00/0.0/397/72 26 W VEC1 26 W RMY 27
1/3 30/14/22/-6/0.00/0.0/342/62 31 WNW VEC1 31 WNW RMY 31
1/4 30/21/26/-2/0.03/0.4/171/31 26 NNW VEC1 27 NNW RMY 28
1/5 25/11/18/-10/0.04/0.2/249/00 23 SSE VEC1 22 NW RMY 23
1/6 32/22/27/-1/0.01/T/000/00 22 ENE VEC1 21 E RMY 23
1/7 36/30/33/+6/0.25/0.1/000/00 23 NW VEC1 21 ENE RMY 24
1/8 45/30/38/+11/0.00/0.0/…/.. 26 NW VEC1 27 WNW RMY 27
1/9 50/32/41/+14/0.06/0.0/…/.. 41 SW VEC1 42 SSW RMY 44
1/10 50/36/43/+16/0.36/T/…/.. 33 W VEC1 31 W RMY 31
1/11 41/30/36/+9/0.06/0.0/…/.. 43 WNW VEC1 41 WNW RMY 43
1/12 37/24/31/+4/0.00/0.0/…/.. 47 WNW VEC1 46 WNW RMY 47
1/13 The low since midnight is 28F, the daily normal low is 18F.
————————————————————–
JANUARY DAILY RECORDS TO DATE
NONE.
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JANUARY 13
HIGH 60F IN 2018
LOW -11F IN 1912
PRECIP 1.72 INS. IN 2024
SNOWFALL 12.6 INS. IN 1964
PEAK GUST 74 MPH NE IN 1964
RECORDS FOR JANUARY 14
HIGH 65F IN 1995
LOW -12F IN 1914
PRECIP 1.45 INS. IN 2008
SNOWFALL 10.3 INS. IN 2008
PEAK GUST 68 MPH WNW IN 1976, S IN 2005
TODAY’S REPORT PREPARED BY: Matt Douglas
