Thursday, October 23, 2025

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

THURSDAY, OCTOBER 23, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0607E
SUNSET:  1649E

A MIX OF SUN AND CLOUDS WITH MILD TEMPERATURES AND A BRISK WIND….

Today has featured a mix of sun and clouds through the day
with mainly high level clouds this morning, but generally
just low level diurnal clouds early this afternoon.

Temperatures are cooler than they have been the past few
days, but still slightly above normal levels for the date.
Readings have reached the low 60s once again today. The dew
point has been holding fairly steady around 40F degrees,
indicative of a considerably drier air mass than what was in
place yesterday.

The wind has been somewhat busy again today out of the southwest,
becoming gustier as we approached the late morning hours into
early this afternoon. The average speed for the day so far is
around 13mph. The peak gust for the day so far is 28mph, which
occurred just before 12:30pm.

Visibility has been decent all day with a view of around 60
miles.

The maximum temperature so far today is 61F degrees, which is
3 degrees above the normal high of 58F. The minimum temperature
since midnight is 45F degrees, which is 4 degrees above the
normal low of 41F.

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Today’s Observations:

7 A.M.
Weather: Broken cirrostratus, broken cirrus, few stratocumulus
distant SE-SW
Temperature: 48F; Dew Point: 39F; Relative Humidity: 71%
Wind: SW @ 9G17 kts
Sea-level pressure: 1011.6 mb; 29.87 in. Hg: rising unsteadily
Visibility: 60 miles
6-hr Max temp: 50F
6-hr Min temp: 45F
24-hr Precip: 0.35 inches
BHO SA 1155 E220 BKN 250 BKN 60 116/48/39/2209G17/987/
FEW SC DSNT SE-SW/ 8/506 52015 70035 10050 20045

10 A.M.
Weather: Scattered cirrostratus, few stratocumulus all quadrants,
few altocumulus distant S-W
Temperature: 55F; Dew Point: 41F; Relative Humidity: 59%
Wind: SW @ 10G19 kts
Sea-level pressure: 1012.5 mb; 29.90 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 180 SCT 60 125/55/41/2310G19/990/ FEW SC ALQDS
FEW AC DSNT S-W/ 8/558 50009

1 P.M.
Weather: Broken stratocumulus
Temperature: 59F Dew Point: 40F; Relative Humidity: 48%
Wind: SW @ 10G21 kts
Sea-level pressure: 1011.7 mb; 29.88 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 61F
6-hr Min temp: 48F
6-hr Precip: 0.00 inches
BHO SA 1755 E50 BKN 60 117/59/40/2314G21/988/ 8/500 58008
10061 20048

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SUMMARY FOR WEDNESDAY, OCTOBER 22, 2025

TEMPERATURE (DEGREES F)
MAX…….67   NORMAL…..59
MIN…….51   NORMAL…..42
MEAN……59   NORMAL…..50

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+9
TOTAL DEPARTURE FOR THE MONTH………………………+62 [+2.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..6  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH……………197  DEPARTURE…….-49
TOTAL HEATING UNITS FOR THE SEASON…………..260  DEPARTURE……-103
TOTAL HEATING UNITS LAST SEASON TO DATE………275  DEPARTURE…….-15

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………760  DEPARTURE……..-4

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)………..32 SW   @   01:10 P.M.
VECTOR #1 (1-Sec)……….33 SW   @   01:10 P.M.
VECTOR #2 (1-Sec)……….32 SW   @   01:12 P.M.
DAVIS #1……………….32 SW   @   01:10 P.M.
DAVIS #2 ………………30 WSW  @   01:10 P.M.
RMY #1 (Instantaneous)…..33 SW   @   12:46 P.M.
RMY #2 (Instantaneous)…..32 SW   @   01:10 P.M.
MERLIN…………………31 SW
RICHARDS (C5C) (Inst)……34 WSW  @   01:13 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SW   @   12:53 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..24 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..23 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 SW   @   01:10 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 SW   @   12:53 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.2 SW [269 total miles] VECTOR #1………………11.9
VECTOR #2………………12.6
DAVIS #1……………….11.7 SW
DAVIS #2………………….M
RMY #1…………………11.6 SW
RMY #2…………………12.5 SW
RICHARDS (C5C)………….11.6

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.35 DEPARTURE…..+0.17
TOTAL PRECIPITATION FOR THE MONTH…………..5.53 DEPARTURE…..+1.68
TOTAL PRECIPITATION FOR THE YEAR (2025)…….41.35 DEPARTURE…..-1.17

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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/-6/0.00/410/62            35 NW  VEC1 35 NW  RMY 36
10/17 61/41/51/-1/0.00/652/99            26 N   VEC1 26 N   RMY 27
10/18 63/40/52/0/0.00/604/92             17 SSE VEC1 16 NNW RMY 17
10/19 68/50/59/+8/0.00/568/87            28 SSE VEC1 29 SSE RMY 28
10/20 64/51/58/+7/0.75/072/11            40 SSE VEC1 40 SSE RMY 41
10/21 65/47/56/+5/0.00/648/100           28 WSW VEC1 28 WSW RMY 29
10/22 67/51/59/+9/0.44/387/60            32 SW  VEC1 33 SW  RMY 33

10/23 The low since midnight is 45F, the daily normal low is 41F.

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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

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

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

RECORDS FOR OCTOBER 24
HIGH 79F IN 1963
LOW 22F IN 1969
PRECIP 2.96 INCHES IN 1890
SNOWFALL 1.8 INCHES IN 1960
PEAK GUST 70 MPH SE IN 1959

TODAY’S REPORT PREPARED BY: Matt Douglas