Friday, October 31, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
FRIDAY, OCTOBER 31, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0617E
SUNSET: 1638E
BLUSTERY, MOSTLY CLOUDY CONDITIONS TO FINISH OCTOBER….
Yesterday’s nearly all day drizzle and overnight rain netted
us 0.78 inches, bringing our monthly total to an impressive
6.49″ for the month. The month of October has shaped up to
be mild and wetter than average, with +1.5 degrees above
normal and +1.18 inches above normal.
Today has remained dry fortunately, and we have remained
under mostly cloudy conditions throughout the day.
Our high temperature of the day so far occurred during the
overnight as the front pushed through the region. Since then,
temperatures have not fluctuated too much, ranging from 57F to
52F. Dew points have hovered in the upper 40s and low 50s as
the rain moved out of the area.
The wind has been the star of the show today. Winds steadily
increased from yesterday afternoon through this afternoon and
have no inclinations of slowing down just yet. Winds overnight
were out of the east and have shifted to a west-southwesterly
flow by this afternoon. The average speed for the day so far is
around 18mph. The peak gust for the day so far is 50mph, which
occurred at 12:21am this morning.
Visibility fluctuated between 60-70 miles throughout the day.
The maximum temperature so far today is 58F degrees, which is
2 degrees above the normal high of 56F. The minimum temperature
since midnight is 52F degrees, which is 13 degrees above the
normal low of 39F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, few stratus fractus SSW-NNW
Temperature: 53F; Dew Point: 53F; Relative Humidity: 98%
Wind: SW @ 21 kts
Sea-level pressure: 987.2 mb; 29.15 in. Hg: rising, then
more slowly
Visibility: 70 miles
6-hr Max temp: 58F
6-hr Min temp: 53F
24-hr Precip: 0.78 inches
BHO SA 1155 E30 BKN 70 872/53/53/2121/915/ FEW STFRA SSW-NNW
PK WND 2229/28/ 8/6// 51018 70078 10058 20053
10 A.M.
Weather: Broken stratocumulus
Temperature: 55F; Dew Point: 48F; Relative Humidity: 76%
Wind: WSW @ 22G29 kts, peak wind W 35mph at 9:50 A.M.
Sea-level pressure: 988.8 mb; 29.20 in. Hg: rising, then
more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E35 BKN 60 888/55/48/2522G029/920/ PK WND 2630/50/
8/5// 51016
1 P.M.
Weather: Broken stratocumulus
Temperature: 54F Dew Point: 46F; Relative Humidity: 74%
Wind: SW @ 17G25 kts, peak wind SW 30mph at 12:24 P.M.
Sea-level pressure: 988.0 mb; 29.18 in. Hg: falling, then
more slowly
Visibility: 60 miles
6-hr Max temp: 56F
6-hr Min temp: 53F
6-hr Precip: 0.00 inches
BHO SA 1755 E35 BKN 60 880/54/46/2417G25/918/ PK WND 2430/24
8/5// 56008 10056 20053
————————————————————–
SUMMARY FOR THURSDAY, OCTOBER 30, 2025
TEMPERATURE (DEGREES F)
MAX…….57 NORMAL…..56
MIN…….46 NORMAL…..39
MEAN……52 NORMAL…..48
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+52 [+1.5 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….13 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH……………336 DEPARTURE…….-40
TOTAL HEATING UNITS FOR THE SEASON…………..399 DEPARTURE…….-95
TOTAL HEATING UNITS LAST SEASON TO DATE………373 DEPARTURE…….+26
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)………..43 E @ 11:51 P.M.
VECTOR #1 (1-Sec)……….43 E @ 11:04 P.M.
VECTOR #2 (1-Sec)……….42 ENE @ 11:56 P.M.
DAVIS #1……………….42 E @ 11:50 P.M.
DAVIS #2 ………………41 E @ 11:52 P.M.
RMY #1 (Instantaneous)…..46 E @ 11:51 P.M.
RMY #2 (Instantaneous)…..46 ENE @ 11:54 P.M.
MERLIN…………………48 E
RICHARDS (C5C) (Inst)……40 ENE @ 11:55 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………29 E @ 11:52 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29 E @ 10:52 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 ENE @ 11:53 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………32 E @ 11:52 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 E @ 11:53 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..29 E @ 11:52 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..31 ENE @ 11:53 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………29 E @ 11:52 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..15.2 E [365 total miles]
VECTOR #1………………14.9
VECTOR #2………………15.0
DAVIS #1……………….15.9 E
DAVIS #2………………….M
RMY #1…………………15.0 E
RMY #2…………………14.8 E
RICHARDS (C5C)………….15.3
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.78 DEPARTURE…..+0.61
TOTAL PRECIPITATION FOR THE MONTH…………..6.49 DEPARTURE…..+1.18
TOTAL PRECIPITATION FOR THE YEAR (2025)…….42.31 DEPARTURE…..-1.67
————————————————————–
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/+3/0.00/462/72 29 WSW VEC1 29 WSW RMY 29
10/24 58/41/50/0/0.00/403/63 20 WNW VEC1 20 WNW RMY 19
10/25 55/38/47/-2/0.00/491/77 23 NW VEC1 23 NNW RMY 23
10/26 56/37/47/-2/0.00/635/100 23 WNW VEC1 23 WNW RMY 24
10/27 51/34/43/-6/0.00/341/54 18 NNE VEC1 19 NNW RMY 19
10/28 49/37/43/-5/T/075/12 35 NE VEC1 35 NE RMY 37
10/29 48/44/46/-2/0.12/000/00 32 NE VEC1 33 NE RMY 33
10/30 57/46/52/+4/…/000/00 43 E VEC1 43 E RMY 46
10/31 The low since midnight is 52F, the daily normal low is 39F.
————————————————————–
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 31
HIGH 79F IN 1946
LOW 22F IN 1904
PRECIP 3.74 INCHES IN 1991
SNOWFALL TRACE IN 1906
PEAK GUST 70e S IN 1945
RECORDS FOR NOVEMBER 1
HIGH 77 IN 2024
LOW 22 IN 1913,1923
PRECIP 2.37 INCHES IN 1988
SNOWFALL TRACE IN 1906,1951,2023
PEAK GUST 78 ESE IN 1997
TODAY’S REPORT PREPARED BY: Amanda Joly
