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Saturday, October 18, 2025

October 18, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SATURDAY, OCTOBER 18, 2025 ALL TIMES ARE…

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

SATURDAY, OCTOBER 18, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0601E
SUNSET:  1657E

SPECTACULAR SATURDAY WITH SUNSHINE AND SEASONABLE TEMPERATURES….

Skies have been mainly clear for the most part today with some
high thin cirrus clouds streaming across the sky. Low clouds
have once again been staying over the ocean. With less wind
and mild temperatures, it’s a beautiful day for mid October
standards, and a great day to be outdoors!

Temperatures are near normal today with readings into the low
60s. The dew point has been very comfortable with values
generally in the low 40s.

The wind has been quite light today with an average speed for
the day so far of around 8mph. The peak gust so far for the
day is 16mph, which occurred right after 6am.

Visibility has been quite decent today, generally between
60-70 miles.

The maximum temperature so far today is 62F degrees, which is
2 degrees above the normal high of 60F. The minimum temperature
since midnight is 40F degrees, which is 3 degrees below the
normal low of 43F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant E-ESE, few altocumulus
distant SW-NW, few cirrus all quadrants
Temperature: 44F; Dew Point: 38F; Relative Humidity: 77%
Wind: NNE @ 7 kts
Sea-level pressure: 1016.8 mb; 30.03 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 44F
6-hr Min temp: 40F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 168/44/38/0207/003/ FEW SC DSNT E-ESE
FEW AC DSNT SW-NW FEW CI ALQDS/ 8/551 53016 10044 20040

10 A.M.
Weather: Clear, few stratocumulus distant ESE-SSW, few altocumulus
distant SW-NW, few cirrus all quadrants
Temperature: 55F; Dew Point: 42F; Relative Humidity: 61%
Wind: Calm
Sea-level pressure: 1017.7 mb; 30.05 in. Hg: rising, then steady
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 177/55/42/0000/005/ FEW SC DSNT ESE-SSW
FEW AC DSNT SW-NW FEW CI ALQDS WND CALM/ 8/551 51009

1 P.M.
Weather: Thin broken cirrus, few stratocumulus distant SE-SSE,
few altocumulus distant NW-N
Temperature: 62F Dew Point: 43F; Relative Humidity: 49%
Wind: WNW @  2 kts, wind light and variable
Sea-level pressure: 1016.2 mb; 30.01 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 62F
6-hr Min temp: 44F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 -BKN 70 162/62/43/2902/001/ FEW SC DSNT SE-SSE
FEW AC DSNT NW-N WND L/V/ 8/501 58015 10062 20044

————————————————————–

SUMMARY FOR FRIDAY, OCTOBER 17, 2025

TEMPERATURE (DEGREES F)
MAX…….61   NORMAL…..61
MIN…….41   NORMAL…..44
MEAN……51   NORMAL…..52

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH………………………+33 [+1.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….14  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH……………156  DEPARTURE…….-19
TOTAL HEATING UNITS FOR THE SEASON…………..219  DEPARTURE…….-74
TOTAL HEATING UNITS LAST SEASON TO DATE………251  DEPARTURE…….-32

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…….+14
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+80
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)………..26 N    @   08:54 A.M.
VECTOR #1 (1-Sec)……….26 N    @   08:54 A.M.
VECTOR #2 (1-Sec)……….26 N    @   08:54 A.M.
DAVIS #1……………….25 NNE  @   08:54 A.M.
DAVIS #2 ………………21 NNE  @   08:53 A.M.
RMY #1 (Instantaneous)…..27 N    @   08:54 A.M.
RMY #2 (Instantaneous)…..26 N    @   08:54 A.M.
MERLIN…………………25 NNE
RICHARDS (C5C) (Inst)……25 N    @   08:54 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 N    @   08:55 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 N    @   09:09 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 N    @   10:26 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 NNW  @   12:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 NNE  @   10:26 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 NNW  @   12:06 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 N    @   10:26 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 NNW  @   12:06 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.9 NNW [190 total miles] VECTOR #1……………….9.0
VECTOR #2……………….9.1
DAVIS #1………………..9.0 N
DAVIS #2………………….M
RMY #1………………….8.7 N
RMY #2………………….9.0 N
RICHARDS (C5C)…………..9.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.19
TOTAL PRECIPITATION FOR THE MONTH…………..4.34 DEPARTURE…..+1.42
TOTAL PRECIPITATION FOR THE YEAR (2025)…….40.16 DEPARTURE…..-1.43

————————————————————–

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/-7/0.00/667/98            33 NNW VEC1 35 NNW RMY 35
10/10 61/38/50/-5/0.00/664/98            25 SSW VEC1 26 S   RMY 26
10/11 66/49/58/+4/0.00/243/36            21 SW  VEC1 21 SW  RMY 20
10/12 56/52/54/0/0.91/000/00             50 ENE VEC1 50 ENE RMY 52
10/13 53/50/52/-2/2.14/000/00            51 ENE VEC1 51 ENE RMY 51
10/14 53/50/52/-1/0.49/000/00            36 NE  VEC1 36 NNE RMY 35
10/15 62/44/53/0/T/319/48                33 NNW VEC1 33 NNW RMY 35
10/16 53/39/46/-6/0.00/…/..            35 NW  VEC1 35 NW  RMY 36
10/17 61/41/51/-1/0.00/…/..            26 N   VEC1 26 N   RMY 27

10/18 The low since midnight is 40F, the daily normal low is 43F.

————————————————————–

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

10/13 PEAK GUST OF 51 MPH ENE,
BEAT THE OLD RECORD OF 46e MPH W IN 1950

————————————————————–

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

RECORDS FOR OCTOBER 18
HIGH 82F IN 1908
LOW 26F IN 1939
PRECIP 2.79 INCHES IN 1975
SNOWFALL 3.0 INCHES IN 2009
PEAK GUST 66 MPH S IN 1967

RECORDS FOR OCTOBER 19
HIGH 81F IN 1945
LOW 21F IN 1922
PRECIP 3.64 INCHES IN 1932
SNOWFALL 1.0 INCHES IN 1972
PEAK GUST 66 MPH SSW IN 1967

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

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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