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Friday, October 10, 2025

October 10, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, OCTOBER 10, 2025 ALL TIMES ARE…

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

FRIDAY, OCTOBER 10, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0552E
SUNSET:  1710E

CLEAR SKIES, PLENTY OF SUNSHINE WITH LIGHT AND VARIABLE WIND….

Today started out much the same as yesterday, with mostly clear
skies and a chill in the air. We have had plenty of brilliant
sunshine all day and because it’s been dry the past couple of
days we have gained a bit of warmth today, though still coming
just shy of our normal highs for the day so far.

Temperatures dipped into the upper 30s during the early morning
hours here, but thankfully rebounded quickly with all day sunshine.
At 7am we were at 46F and by 1pm had hit 60F which was warmer than
yesterday. Dry, cool air has still been the theme, but without the
gusty wind it has been much more tolerable for outdoor activities.

Winds have been light and variable for much of the day, with
directions out of the east in the morning to a more southwesterly
flow by the early afternoon. The average speed for the day so far
is only around 8 mph. The peak gust for the day so far has been
18 mph, and occurred just after the 1pm observation.

Visibility has been excellent for yet another day with 80 mile
views.

The maximum temperature so far today is 60F degrees, which is
3 degrees below the normal high of 63F. The minimum temperature
since midnight is 38F degrees, which is 8 degrees below the
normal low of 46F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant ENE-S
Temperature: 46F; Dew Point: 39F; Relative Humidity: 74%
Wind: E @ 4 kts, wind light
Sea-level pressure: 1034.4 mb; 30.55 in. Hg: rising, then
more slowly
Visibility: 80 miles
6-hr Max temp: 46F
6-hr Min temp: 38F
24-hr Precip: 0.80 inches
BHO SA 1155 CLR 80 344/46/39/0804/055/ FEW AC DSNT ENE-S
WND LGT/ 8/050 51007 10046 20038

10 A.M.
Weather: Clear, few cumulus NE, few stratocumulus distant
ESE-SSW
Temperature: 55F; Dew Point: 36F; Relative Humidity: 48%
Wind: S @ 5 kts, light and variable
Sea-level pressure: 1034.1 mb; 30.44 in. Hg: rising, then
falling
Visibility: 80 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 341/55/36/1805/054/ FEW SC NE FEW AC DSNT
ESE-SSW WND L/V/ 8/550 58003

1 P.M.
Weather: Clear, few altocumulus distant E-S-SSW
Temperature: 60F Dew Point: 36F; Relative Humidity: 42%
Wind: SW @ 4 kts, light and variable
Sea-level pressure: 1033.1 mb; 30.45 in. Hg: falling, then
more rapidly
Visibility: 80 miles
6-hr Max temp: 60F
6-hr Min temp: 46F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 331/60/36/2304/045/ FEW AC DSNT E-S-SSW WND L/V/
8/050 58030 10060 20046

————————————————————–

SUMMARY FOR THURSDAY, OCTOBER 9, 2025

TEMPERATURE (DEGREES F)
MAX…….55   NORMAL…..64
MIN…….40   NORMAL…..47
MEAN……48   NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-7
TOTAL DEPARTURE FOR THE MONTH………………………+44 [+4.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….17  DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE MONTH…………….52  DEPARTURE…….-28
TOTAL HEATING UNITS FOR THE SEASON…………..115  DEPARTURE…….-83
TOTAL HEATING UNITS LAST SEASON TO DATE………125  DEPARTURE…….-10

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….20  DEPARTURE…….+16
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+81
TOTAL COOLING UNITS LAST SEASON TO DATE………757  DEPARTURE……..-1

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 NNW  @   07:52 A.M.
VECTOR #1 (1-Sec)……….35 NNW  @   08:35 A.M.
VECTOR #2 (1-Sec)……….38 NNW  @   07:40 A.M.
DAVIS #1……………….32 NW   @   07:56 A.M.
DAVIS #2 ………………34 N    @   07:40 A.M.
RMY #1 (Instantaneous)…..35 NNW  @   07:40 A.M.
RMY #2 (Instantaneous)…..38 NNW  @   07:40 A.M.
MERLIN…………………33 N
RICHARDS (C5C) (Inst)……34 NNW  @   07:40 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 NNW  @   07:41 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22 NNW  @   07:41 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 NW   @   07:29 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 NNW  @   07:41 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 N    @   07:41 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 NNW  @   07:41 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 NW   @   07:29 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22 NNW  @   07:41 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.6 NNW [278 total miles] VECTOR #1………………11.5
VECTOR #2………………11.6
DAVIS #1……………….11.6 NNW
DAVIS #2……………….11.4 N
RMY #1…………………11.2 NNW
RMY #2…………………11.5 NNW
RICHARDS (C5C)………….11.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.80 DEPARTURE…..-0.71
TOTAL PRECIPITATION FOR THE YEAR (2025)…….36.62 DEPARTURE…..-3.56

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

10/1  61/49/55/-3/0.00/668/97            30 NE  VEC1 30 NE  RMY 30
10/2  60/43/52/-6/0.00/637/91            28 NE  VEC1 28 NE  RMY 28
10/3  72/46/59/+2/0.00/670/96            23 SW  VEC1 23 SW  RMY 23
10/4  81/53/67/+10/0.00/667/96           18 NNW VEC1 18 NW  RMY 19
10/5  84/62/73/+16/0.00/664/96           18 SSW VEC1 18 SSW RMY 18
10/6  83/59/71/+15/0.00/649/94           25 SSW VEC1 25 SSW RMY 26
10/7  79/59/69/+13/0.00/440/64           35 SSW VEC1 35 SSW RMY 36
10/8  68/49/59/+4/0.80/027/04            33 NW  VEC1 34 SSW RMY 35 TSTM
10/9  55/40/48/-7/0.00/…/..            33 NNW VEC1 35 NNW RMY 35

10/10 The low since midnight is 38F, the daily normal low is 46F.

————————————————————–

OCTOBER DAILY RECORDS TO DATE

10/5 HIGH MINIMUM TEMPERATURE OF 62F,
TIED THE RECORD FOR THE DATE WITH 1910

10/6 HIGH MAXIMUM TEMPERATURE OF 83F,
TIED THE RECORD FOR THE DATE WITH 1990 AND 2007

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR OCTOBER 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958

RECORDS FOR OCTOBER 11
HIGH 80F IN 1919,1949
LOW 28F IN 1993
PRECIP 1.36 INCHES IN 2019
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941

TODAY’S REPORT PREPARED BY: Amanda Joly

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Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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