Sunday, January 11, 2026
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JANUARY 11, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0712E
SUNSET: 1632E
OVERNIGHT RAIN AND LINGERING FOG THIS MORNING IMPROVES WITH
AFTERNOON CLEARING AND SUNSHINE….
We received 0.42″ of rain from last night’s system, starting with
sleet and transitioning into rain and drizzle through the early
morning. After the precipitation moved out, we were left in the
clouds for much of the day, as foggy conditions dominated our
view until the early afternoon hours. Finally, sunshine made an
appearance, though the day has felt very raw and chilly overall.
Temperatures have been more seasonal today, although the overnight
low was significantly warmer than normal. Temperatures have been
steady in the mid to upper 30’s since the overnight. With the
lingering fog and high dew points, temperatures have not fluctuated
much at all. With the sun finally making an appearance during the
final observation it may be possible that we warm a little more,
though with cold air advection coming through it’s not a guarantee.
The wind has been primarily steady and out of the northwest for
most of the day, with the exception of this past hour which has
seen a slight shift westerly and a dramatic reduction in speed.
The average speed for the day so far is around 10mph. The peak
gust for the day so far is 30mph, which occurred just after midnight.
Visibility was limited to less than a mile for much of the morning
due to foggy conditions, but dramatically improved during the early
afternoon with about 70 miles of viewing pleasure!
The maximum temperature so far today is 39F degrees, which is
4 degrees above the normal high of 35F. The minimum temperature
since midnight is 35F degrees, which is 16 degrees above the
normal low of 19F.
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Today’s Observations:
7 A.M.
Weather: Sky obscured, vertical visibility 200 ft
Temperature: 35F; Dew Point: 35F; Relative Humidity: 100%
Wind: NW @ 8 kts
Sea-level pressure: 1007.9 mb; 29.76 in. Hg: rising, then
more slowly
Visibility: 1/4 mile, fog
6-hr Max temp: 39F
6-hr Min temp: 35F
24-hr Precip: 0.42 inches
24-hr Snowfall: Trace
Snow Depth: 0 inches
BHO SA 1155 X W2 1/4F 079/35/35/3208/976/ 8//// 51017 6005/
70042 10039 20035
10 A.M.
Weather: Sky obscured, vertical visibility 200 ft
Temperature: 36F; Dew Point: 36F; Relative Humidity: 100%
Wind: NW @ 6 kts, wind light
Sea-level pressure: 1008.1 mb; 29.77 in. Hg: rising, then
falling
Visibility: 1/4 mile, fog
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 X W2 1/4F 081/36/36/3206/977/ WND LGT/ 8////
50002
1 P.M.
Weather: Broken stratocumulus, broken cirrus, few stratus
fractus NNE-ENE, virga E-SSE
Temperature: 37F; Dew Point: 36F; Relative Humidity: 96%
Wind: WNW @ 2 kts, wind light
Sea-level pressure: 1005.6 mb; 29.70 in. Hg: falling, then
more slowly
Visibility: 70 miles
6-hr Max temp: 37F
6-hr Min temp: 35F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E19 BKN 250 BKN 70 056/37/36/2902/970/ FEW STFRA
NNE-ENE VIRGA E-SSE WND LGT/ 8/501 56025 10037 20035
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SUMMARY FOR SATURDAY, JANUARY 10, 2026
TEMPERATURE (DEGREES F)
MAX…….50 NORMAL…..35
MIN…….36 NORMAL…..19
MEAN……43 NORMAL…..27
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+16
TOTAL DEPARTURE FOR THE MONTH………………………+10 [+0.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….22 DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE MONTH……………363 DEPARTURE…….-11
TOTAL HEATING UNITS FOR THE SEASON………….2603 DEPARTURE…….+19
TOTAL HEATING UNITS LAST SEASON TO DATE……..2314 DEPARTURE……+289
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)………..33 SW @ 02:11 A.M.
VECTOR #1 (1-Sec)……….33 SSW @ 02:11 A.M.
VECTOR #2 (1-Sec)……….33 SSW @ 12:08 A.M.
DAVIS #1……………….33 S @ 02:11 A.M.
DAVIS #2 ………………32 S @ 12:08 A.M.
RMY #1 (Instantaneous)…..31 SSW @ 12:05 A.M.
RMY #2 (Instantaneous)…..32 WSW @ 12:08 A.M.
MERLIN…………………M
RICHARDS (C5C) (Inst)……32 SW @ 02:11 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 WNW @ 02:02 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..21 WNW @ 02:02 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 W @ 01:29 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 W @ 02:02 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 W @ 12:53 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..21 W @ 12:53 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 W @ 01:29 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 WNW @ 02:02 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.7 NW [280 total miles]
VECTOR #1………………11.5
VECTOR #2………………11.9
DAVIS #1……………….12.0 NNW
DAVIS #2……………….11.6 N
RMY #1…………………11.3 N
RMY #2…………………11.7 N
RICHARDS (C5C)………….11.9
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.42 DEPARTURE…..+0.27
TOTAL PRECIPITATION FOR THE MONTH (JAN)……..0.96 DEPARTURE…..-0.55
TOTAL PRECIPITATION FOR THE YEAR (2026)……..0.96 DEPARTURE…..-0.55
SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………TRACE DEPARTURE…..-0.6
TOTAL SNOWFALL FOR THE MONTH (JAN)…………..3.4 DEPARTURE…..-2.1
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……10.3 DEPARTURE….-10.3
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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/-9/0.15/2.7/264/48 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 The low since midnight is 35F, the daily normal low is 19F.
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JANUARY 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 JANUARY 11
HIGH 65F IN 2020
LOW -7F IN 1968
PRECIP 1.58 INS. IN 2008
SNOW 10.2 INS. 1927
PEAK GUST 95e MPH S IN 1980
RECORDS FOR JANUARY 12
HIGH 68F IN 2020 [RECORD HIGH TIE FOR MONTH]
LOW -15F IN 1886
PRECIP 2.04 INS. IN 2011
SNOW 18.2 INS. IN 2011
WIND 84e MPH S IN 1980
TODAY’S REPORT PREPARED BY: Amanda Joly
