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Wednesday, October 22, 2025

October 22, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, OCTOBER 22, 2025 ALL TIMES ARE…

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

WEDNESDAY, OCTOBER 22, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0606E
SUNSET:  1651E

RAIN SHOWERS THIS MORNING MOVE OUT LEAVING PARTIAL SUNSHINE
THIS AFTERNOON….

A frontal system moved through this morning bringing a band of
rain showers through for a few hours. 0.44″ of total rainfall
was measured from this event. However the front has pushed
through with partial clearing taking place this afternoon.

Temperatures are once again above normal for the date with
readings reaching the mid 60s early this afternoon. The dew
point has dropped from the mid 50s to the upper 40s as drier
air works into the area.

The wind has generally been busy today except for about an
hour early this morning when it actually went calm. The
average speed for the day so far is around 12mph. The peak
gust for the day so far is 32mph, which occurred just after
the 1pm observation.

Visibility started the day limited due to rain and fog, but
has improved markedly early this afternoon as drier air works
in. The view improved from around 5 miles to 50 miles.

The maximum temperature so far today is 66F degrees, which is
7 degrees above the normal high of 59F. The minimum temperature
since midnight is 52F degrees, which is 10 degrees above the
normal low of 42F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, light rain showers
Temperature: 53F; Dew Point: 53F; Relative Humidity: 99%
Wind: Calm
Sea-level pressure: 1007.0 mb; 29.74 in. Hg: falling, then more rapidly
Visibility: 5 miles, 3 miles S-W-N, 7 miles ENE-ESE, fog
6-hr Max temp: 55F
6-hr Min temp: 53F
24-hr Precip: 0.09 inches
BHO SA 1155 E25 OVC 5RW-F 070/53/53/0000/974/ VSBY 3 S-W-N
7 ENE-ESE WND CALM/ 8/5// 58018 6009/ 70009 10055 20053

10 A.M.
Weather: Broken stratus fractus, overcast altocumulus/altostratus,
few breaks in overcast distant S-W
Temperature: 56F; Dew Point: 56F; Relative Humidity: 98%
Wind: SW @ 8 kts
Sea-level pressure: 1005.6 mb; 29.70 in. Hg: falling, then more slowly
Visibility: 30 miles
3-hr Precip: 0.35 inches
BHO SA 1455 E10 BKN 90 OVC 30 056/56/56/2208/970/ FEW BINOVC DSNT
S-W CB DSNT WSW-W FEW LWR STFRA ALQDS RW-B08E16B48E51/ 8/77/
56014 6035/

1 P.M.
Weather: Broken cumulus
Temperature: 65F Dew Point: 49F; Relative Humidity: 55%
Wind: SW @ 17G26 kts, peak wind SW 30mph at 12:48 P.M.
Sea-level pressure: 1004.6 mb; 29.67 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 66F
6-hr Min temp: 53F
6-hr Precip: 0.35 inches
BHO SA 1755 E30 BKN 50 046/65/49/2317G26/967/ PK WND 2226/48/
8/200 56010 6035/ 10066 20053

————————————————————–

SUMMARY FOR TUESDAY, OCTOBER 21, 2025

TEMPERATURE (DEGREES F)
MAX…….65   NORMAL…..59
MIN…….47   NORMAL…..42
MEAN……56   NORMAL…..51

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+5
TOTAL DEPARTURE FOR THE MONTH………………………+53 [+2.3 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..9  DEPARTURE……..-6
TOTAL HEATING UNITS FOR THE MONTH……………191  DEPARTURE…….-40
TOTAL HEATING UNITS FOR THE SEASON…………..254  DEPARTURE…….-94
TOTAL HEATING UNITS LAST SEASON TO DATE………275  DEPARTURE…….-21

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…….+13
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………759  DEPARTURE……..-3

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)………..28 WSW  @   09:58 A.M.
VECTOR #1 (1-Sec)……….28 WSW  @   07:46 A.M.
VECTOR #2 (1-Sec)……….31 WSW  @   07:46 A.M.
DAVIS #1……………….29 W    @   09:15 A.M.
DAVIS #2 ………………29 SW   @   07:53 A.M.
RMY #1 (Instantaneous)…..29 WSW  @   09:15 A.M.
RMY #2 (Instantaneous)…..33 WSW  @   07:53 A.M.
MERLIN…………………26 WSW
RICHARDS (C5C) (Inst)……29 WSW  @   07:46 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 WSW  @   10:16 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 WSW  @   07:48 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 WSW  @   07:47 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 WSW  @   07:48 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 S    @   11:54 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 WSW  @   07:47 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 WSW  @   07:47 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………18 WSW  @   07:47 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.7 WSW [305 total miles] VECTOR #1………………13.1
VECTOR #2………………13.8
DAVIS #1……………….13.2 SW
DAVIS #2………………….M
RMY #1…………………12.8 SW
RMY #2…………………13.7 SW
RICHARDS (C5C)………….12.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.09 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH…………..5.18 DEPARTURE…..+1.51
TOTAL PRECIPITATION FOR THE YEAR (2025)…….41.00 DEPARTURE…..-1.34

————————————————————–

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 63/40/52/0/0.00/…/..             17 SSE VEC1 16 NNW RMY 17
10/19 68/50/59/+8/0.00/…/..            28 SSE VEC1 29 SSE RMY 28
10/20 64/51/58/+7/0.75/…/..            40 SSE VEC1 40 SSE RMY 41
10/21 65/47/56/+5/0.00/…/..            28 WSW VEC1 28 WSW RMY 29

10/22 The low since midnight is 52F, the daily normal low is 42F.

————————————————————–

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 22
HIGH 85F IN 1979
LOW 23F IN 1940
PRECIP 2.38 INCHES IN 2014
SNOWFALL TRACE IN 1969, 2010
PEAK GUST 67 MPH ESE IN 1988

RECORDS FOR OCTOBER 23
HIGH 82F IN 1947
LOW 24F IN 1969
PRECIP 3.66 INCHES IN 2014
SNOWFALL 3.0 INCHES IN 1891
PEAK GUST 78e MPH NW IN 1941

TODAY’S REPORT PREPARED BY: Matt Douglas

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

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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