Monday, October 27, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY OCTOBER 27, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0612E
SUNSET: 1644E
SUNNY START, THEN CLOUDS ROLLED IN, STILL ON THE CHILLY SIDE….
We started the day with clear skies and a touch of frost for the
first time this season here on the summit. However, clouds quickly
began moving in from the north and northeast as yet another ocean
storm well to our northeast is stuck and trying to back in toward
the region today.
With the cloud cover, temperatures were not rising too quickly by
late this morning and have recovered to the low 50s after starting
the day in the low to mid 30s. Dew points values started off in
the low 30s, but have since risen to the mid to upper 30s as the
wind became more onshore.
A northwest to north-northwest wind early in the day has gradually
veered around to the north-northeast and northeast. Speeds have
not been on the lighter side with an average speed for the day so
far around 9mph. We have seen some occasional gustiness to the
wind, but each period has been brief. The peak gust for the day
so far is 20mph, which occurred just after 9:30am this morning.
Visibility has been very good today, holding generally around
70 miles throughout the day.
The maximum temperature so far today is 51F degrees, which is
6 degrees below the normal high of 57F. The minimum temperature
since midnight is 34F degrees, which is 6 degrees below the
normal low of 40F.
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Today’s Observations:
7 A.M.
Weather: Clear, few stratocumulus offshore distant NE-SE-S,
few altocumulus/castellanus distant NNW-NE, few cirrus distant N-E-SSW
Temperature: 36F; Dew Point: 32F; Relative Humidity: 84%
Wind: NNW @ 8 kts
Sea-level pressure: 1029.5 mb; 30.40 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 36F
6-hr Min temp: 34F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 295/36/32/3408/040/ FEW SC OFFSHR DSNT NE-SE-S
FEW AC/ACC DSNT NNW-NE FEW CI DSNT N-E-SSW/ 8/581 53008 10036 20034
10 A.M.
Weather: Broken stratocumulus, few lower stratocumulus distant N-ESE
Temperature: 48F; Dew Point: 36F; Relative Humidity: 63%
Wind: N @ 5 kts, wind light
Sea-level pressure: 1029.1 mb; 30.39 in. Hg: steady, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E35 BKN 70 291/48/36/0105/039/ FEW LWR SC DSNT N-ESE
WND LGT/ 8/500 58004
1 P.M.
Weather: Overcast stratocumulus, few breaks in overcast all quadrants
Temperature: 49F Dew Point: 38F; Relative Humidity: 64%
Wind: NE @ 4 kts, wind light
Sea-level pressure: 1027.8 mb; 30.35 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 51F
6-hr Min temp: 36F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 OVC 70 278/49/38/0504/035/ FEW BINOVC ALQDS
WND LGT/ 8/5// 56013 10051 20036
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SUMMARY FOR SUNDAY, OCTOBER 26, 2025
TEMPERATURE (DEGREES F)
MAX…….56 NORMAL…..57
MIN…….37 NORMAL…..40
MEAN……47 NORMAL…..49
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-2
TOTAL DEPARTURE FOR THE MONTH………………………+61 [+2.1 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….18 DEPARTURE……..+2
TOTAL HEATING UNITS FOR THE MONTH……………260 DEPARTURE…….-48
TOTAL HEATING UNITS FOR THE SEASON…………..323 DEPARTURE……-103
TOTAL HEATING UNITS LAST SEASON TO DATE………306 DEPARTURE…….+17
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………761 DEPARTURE……..-5
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)………..23 WNW @ 12:05 P.M.
VECTOR #1 (1-Sec)……….23 WNW @ 12:05 P.M.
VECTOR #2 (1-Sec)……….26 NW @ 12:23 P.M.
DAVIS #1……………….23 WNW @ 12:05 P.M.
DAVIS #2 ………………20 N @ 04:29 P.M.
RMY #1 (Instantaneous)…..24 NW @ 12:24 P.M.
RMY #2 (Instantaneous)…..26 NW @ 12:23 P.M.
MERLIN…………………25 NW
RICHARDS (C5C) (Inst)……23 WNW @ 12:05 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 NW @ 12:27 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 NW @ 12:25 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 NW @ 12:25 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 NW @ 12:25 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 NNW @ 11:53 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 NW @ 12:25 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 NW @ 12:25 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………18 NW @ 12:25 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.5 NNW [203 total miles]
VECTOR #1……………….9.8
VECTOR #2………………10.1
DAVIS #1………………..9.8 NNW
DAVIS #2………………….M
RMY #1………………….9.6 NNW
RMY #2………………….9.9 NNW
RICHARDS (C5C)………….10.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..5.53 DEPARTURE…..+0.94
TOTAL PRECIPITATION FOR THE YEAR (2025)…….41.35 DEPARTURE…..-1.91
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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 61/45/53/+3/0.00/…/.. 29 WSW VEC1 29 WSW RMY 29
10/24 58/41/50/0/0.00/…/.. 20 WNW VEC1 20 WNW RMY 19
10/25 55/38/47/-2/0.00/…/.. 23 NW VEC1 23 NNW RMY 23
10/26 56/37/47/-2/0.00/…/.. 23 WNW VEC1 23 WNW RMY 24
10/27 The low since midnight is 34F, the daily normal low is 40F.
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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 27
HIGH 83F IN 1963
LOW 21F IN 1936
PRECIP 2.08 INCHES IN 2018
SNOW 2.5 INCHES IN 2011
WIND 66 MPH NNE IN 2021
RECORDS FOR OCTOBER 28
HIGH 81F IN 1919
LOW 23F IN 1914
PRECIP 2.46 INCHES IN 2006
SNOWFALL TRACE IN 1891,1934,1957,1979
PEAK GUST 71 MPH SSW IN 1995
TODAY’S REPORT PREPARED BY: Matt Douglas
