Monday, November 10, 2025

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

MONDAY, NOVEMBER 10, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0629E
SUNSET:  1627E

A SLOW MOVING FRONTAL SYSTEM IS BRINGING RAIN TO THE HILL
TODAY….

A slow moving cold front is slowly pushing through the region
as an area of low pressure develops along it. This has kept
mainly light rain ongoing through the day today. The first
batch of rain came through last evening with even some thunder
being reported across southeastern Massachusetts. However no
thunder was observed here at Blue Hill. 0.17″ of rain was
recorded through 7am this morning, with an additional 0.34″
falling between 7am and 1pm today.

Temperatures were warmest during the overnight hours, as a
matter of fact, the high for the day occurred at midnight with
a value of 54F. Readings have been gradually falling into the
upper 40s by late this morning into early this afternoon as
the beginning stages of a much colder air mass begin to
infiltrate the area.

Winds have been generally light and variable so far for the day,
but should shift to the west and increase later this evening.
The average speed for the day so far is only around 6mph. The
peak gust so far, which occurred just before 2:45am this morning
is 20mph.

Visibility has been quite limited today as we’ve been stuck in
the clouds here on the summit. The view, if you can call it that,
has been holding at around 1/8th of a mile all day.

The maximum temperature so far today is 54F degrees, which is
2 degrees above the normal high of 52F. The minimum temperature
since midnight is 47F degrees, which is 11 degrees above the
normal low of 36F.

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Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 53F; Dew Point: 53F; Relative Humidity: 100%
Wind: E @ 5 kts, wind light
Sea-level pressure: 1006.8 mb; 29.73 in. Hg: rising, then more rapidly
Visibility: 1/8 mile, fog
6-hr Max temp: 54F
6-hr Min temp: 53F
24-hr Precip: 0.17 inches
BHO SA 1155 X W2 1/8L-F 068/53/53/0805/973/ WND LGT/ 8////
53008 6002/ 70017 10054 20053

10 A.M.
Weather: Sky obscured, vertical visibility 200ft, light rain
Temperature: 49F; Dew Point: 49F; Relative Humidity: 100%
Wind: NNE @ 4 kts, wind light and variable
Sea-level pressure: 1005.8 mb; 29.70 in. Hg: rising, then falling
Visibility: 1/8 mile, fog
3-hr Precip: 0.19 inches
BHO SA 1455 X W2 1/8R-F 058/49/49/0204/970/ WND L/V/ 8//// 58010 6019/

1 P.M.
Weather: Sky obscured, vertical visibility 200ft, very light rain
Temperature: 48F Dew Point: 48F; Relative Humidity: 100%
Wind: NE @ 6 kts, wind light
Sea-level pressure: 1002.1 mb; 29.59 in. Hg: falling, then more rapidly
Visibility: 1/8 mile, fog
6-hr Max temp: 53F
6-hr Min temp: 47F
6-hr Precip: 0.34 inches
BHO SA 1755 X W2 1/8R-F 021/48/48/0506/959/ PCPN VRY LGT WND LGT/
8//// 58037 6034/ 10053 20047

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SUMMARY FOR SUNDAY, NOVEMBER 9, 2025

TEMPERATURE (DEGREES F)
MAX…….61   NORMAL…..52
MIN…….46   NORMAL…..36
MEAN……54   NORMAL…..44

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+10
TOTAL DEPARTURE FOR THE MONTH………………………+14 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….11  DEPARTURE…….-10
TOTAL HEATING UNITS FOR THE MONTH……………160  DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE SEASON…………..571  DEPARTURE……-117
TOTAL HEATING UNITS LAST SEASON TO DATE………491  DEPARTURE…….+80

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………768  DEPARTURE…….-12

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 ESE  @   07:15 P.M.
VECTOR #1 (1-Sec)……….34 ESE  @   07:15 P.M.
VECTOR #2 (1-Sec)……….34 ESE  @   07:03 P.M.
DAVIS #1……………….33 E    @   06:56 P.M.
DAVIS #2 ………………32 E    @   07:03 P.M.
RMY #1 (Instantaneous)…..35 ESE  @   06:56 P.M.
RMY #2 (Instantaneous)…..36 ESE  @   07:03 P.M.
MERLIN…………………32 SE
RICHARDS (C5C) (Inst)……33 ESE  @   07:15 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………24 ESE  @   07:18 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 ESE  @   08:33 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..23 ESE  @   07:04 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………24 ESE  @   07:16 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 ESE  @   07:05 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 ESE  @   07:16 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..23 ESE  @   07:05 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………23 ESE  @   07:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.3 ESE [223 total miles] VECTOR #1………………10.5
VECTOR #2………………10.5
DAVIS #1……………….10.6 ESE
DAVIS #2………………….M
RMY #1…………………10.3 ESE
RMY #2…………………10.4 ESE
RICHARDS (C5C)………….10.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.17 DEPARTURE…..+0.02
TOTAL PRECIPITATION FOR THE MONTH…………..0.63 DEPARTURE…..-0.69
TOTAL PRECIPITATION FOR THE YEAR (2025)…….42.94 DEPARTURE…..-2.54

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH………………TRACE DEPARTURE…..-0.3
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…..TRACE DEPARTURE…..-1.0

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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 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

11/1  56/38/47/+0/0.00/0.0/619/100       50 W   VEC1 50 W   RMY 50
11/2  53/33/43/-4/0.00/0.0/617/100       23 WNW VEC1 23 WNW RMY 24
11/3  54/42/48/+2/0.16/0.0/012/02        41 WNW VEC1 41 W   RMY 46
11/4  54/42/48/+2/0.00/0.0/605/99        52 NW  VEC1 52 NW  RMY 54
11/5  56/39/48/+2/0.06/0.0/104/17        50 W   VEC1 47 W   RMY 52
11/6  50/34/42/-3/0.02/T/473/78          48 WNW VEC1 48 WNW RMY 49
11/7  52/31/42/-3/0.04/0.0/448/74        43 SSW VEC1 42 SSW RMY 47
11/8  60/45/53/+8/0.18/0.0/307/51        32 WNW VEC1 33 WNW RMY 33
11/9  61/46/54/+10/0.15/0.0/…/..       33 ESE VEC1 34 ESE RMY 35

11/10 The low since midnight is 49F, the daily normal low is 36F.

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NOVEMBER 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 NOVEMBER 10
HIGH 75 IN 1931
LOW 20 IN 2004
PRECIP 2.11 INCHES IN 1888
SNOWFALL 2.2 IN 1987
PEAK GUST 83e S IN 1942

RECORDS FOR NOVEMBER 11
HIGH 73 IN 2020
LOW 17 IN 1956
PRECIP 1.14 INCHES IN 1991
SNOWFALL 2.5 IN 1986
PEAK GUST 64 NW IN 1962

TODAY’S REPORT PREPARED BY: Matt Douglas