Friday, October 30, 2026

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

FRIDAY, OCTOBER 30, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0615E
SUNSET: 1640E

EARLY MORNING RAIN LEADS TO CLEARING SKIES AND BREEZY CONDITIONS….

Skies were mostly cloudy at day break with the passing of a cold
front which brought only a trace of rain to the hill today. Since
then, clouds have decreased and we have had plenty of sunshine and
mild temperatures. It’s hard to believe that it is late October
with temperatures so warm!

Temperatures started warm, only making it to 52F before starting
to rapidly warm up. The record high minimum for today is 60F so
we weren’t close to that record, however, we are near 70F which is
only 5 degrees from the record of 75F which was set back in 1946
and 1989. Dew point values were higher this morning and have
decreased as the front pushed through, bringing dry, cooler air.

Winds started out steady out of the southwest and have shifted to
the west-northwest by the mid-morning. With that shift has come an
increase in speed. The average speed for the day so far is around
14mph. The peak gust for the day so far is 35mph, which occurred
at 10:36am this morning.

Visibility was limited to only about 15 miles early this morning
due to fog and the passing rain. Since drying out, visibility has
improved to around 50 miles by the early afternoon.

The maximum temperature so far today is 70F, which is 14 degrees
above the normal high of 56F. The minimum temperature since
midnight is 52F, which is 13 degrees above the normal low of 39F.

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Today’s Observations:

7 A.M.
Weather: Broken altocumulus, few stratocumulus distant WNW-NW,
virga NNE-ENE
Temperature: 54F; Dew Point: 54F; Relative Humidity: 98%
Wind: WSW @ 10 kts
Sea-level pressure: 1014.8 mb; 29.97 in. Hg: falling, then rising
Visibility: 15 miles, thin fog
6-hr Max temp: 54F
6-hr Min temp: 52F
24-hr Precip: Trace
BHO SA 1155 E90 BKN 15 148/54/54/2410/997/ FEW SC DSNT WNW-NW
VIRGA NNE-ENE THN F ALQDS/ 8/550 53002 6000/ 70000 10054 20052

10 A.M.
Weather: Scattered stratocumulus, few stratocumulus all quadrants
Temperature: 65F; Dew Point: 52F; Relative Humidity: 62%
Wind: WNW @ 15G23 kts, peak wind WNW 32mph at 9:44 A.M.
Sea-level pressure: 1014.2 mb; 29.95 in. Hg: rising, then falling
Visibility: 35 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 100 SCT 35 142/65/52/3015G23/995/ FEW SC ALQDS
PK WND 2928/44/ HAZY/ 8/550 58006

1 P.M.
Weather: Clear, few cumulus all quadrants
Temperature: 69F; Dew Point: 44F; Relative Humidity: 40%
Wind: WNW @ 14G25 kts
Sea-level pressure: 1013.3 mb; 29.92 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 70F
6-hr Min temp: 54F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 50 133/69/44/2814G25/992/ FEW CU ALQDS/ 8/200
56009 10070 20054

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SUMMARY FOR THURSDAY, OCTOBER 29, 2026

TEMPERATURE (DEGREES F)
MAX…….67 NORMAL…..56
MIN…….47 NORMAL…..39
MEAN……57 NORMAL…..48

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+9
TOTAL DEPARTURE FOR THE MONTH (OCT)…………………+47 [+1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..8 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH (OCT)………313 DEPARTURE…….-46
TOTAL HEATING UNITS FOR THE SEASON…………..434 DEPARTURE…….-42
TOTAL HEATING UNITS LAST SEASON TO DATE………386 DEPARTURE…….+48

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH (OCT)……….10 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE SEASON…………..815 DEPARTURE……+138
TOTAL COOLING UNITS LAST SEASON TO DATE………756 DEPARTURE…….+59

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)………..31 SW @ 10:27 A.M.
VECTOR #1 (1-Sec)……….31 SW @ 10:25 A.M.
VECTOR #2 (1-Sec)……….32 SW @ 11:22 A.M.
DAVIS #1……………….30 WSW @ 10:33 A.M.
DAVIS #2 ………………29 SW @ 11:23 A.M.
RMY #1 (Instantaneous)…..31 SW @ 10:26 A.M.
RMY #2 (Instantaneous)…..33 SW @ 11:22 A.M.
MERLIN…………………29 SW
RICHARDS (C5C) (Inst)……30 WSW @ 10:45 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………22 SW @ 10:27 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..22 SW @ 10:27 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 SW @ 10:27 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………22 SW @ 10:28 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 SW @ 10:28 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 SW @ 10:27 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SW @ 10:27 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………21 SW @ 10:27 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….14.5 SW [347 total miles] VECTOR #1……………..14.4
VECTOR #2……………..14.6
DAVIS #1………………14.1 SW
DAVIS #2…………………M
RMY #1………………..14.4 SW
RMY #2………………..15.2 SSW
RICHARDS (C5C)…………13.2

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH (OCT)……..2.18 DEPARTURE…..-2.96
TOTAL PRECIPITATION FOR THE YEAR (2026)…….39.70 DEPARTURE…..-4.11

————————————————————–

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 74/56/65/+7/0.00/084/12 28 SW VEC1 28 SW RMY 27
10/2 84/63/74/+16/0.05/518/74 33 SW VEC1 33 SW RMY 32
10/3 68/51/60/+3/0.00/684/98 24 NNW VEC1 24 NNE RMY 24
10/4 63/49/56/-1/T/320/46 24 ESE VEC1 23 ESE RMY 22
10/5 69/46/58/+1/0.00/581/84 43 WNW VEC1 42 WNW RMY 43
10/6 60/41/51/-5/0.00/676/98 30 WNW VEC1 30 WNW RMY 31
10/7 65/40/53/-3/0.00/660/96 31 S VEC1 31 S RMY 31
10/8 70/53/62/+7/0.00/506/74 33 WNW VEC1 33 SSW RMY 34
10/9 66/47/57/+2/0.00/661/97 40 WNW VEC1 39 WNW RMY 40
10/10 62/44/53/-2/0.00/549/81 22 NW VEC1 22 NW RMY 23
10/11 58/48/53/-1/1.63/014/02 31 ENE VEC1 31 ENE RMY 31
10/12 68/47/58/+4/0.11/390/58 28 NE VEC1 28 NE RMY 27
10/13 59/50/55/+1/0.08/000/00 25 E VEC1 25 ENE RMY 25
10/14 77/55/66/+13/0.01/394/59 31 WNW VEC1 30 WNW RMY 31
10/15 62/49/56/+3/0.00/658/99 33 NNW VEC1 34 NNW RMY 35
10/16 65/48/57/+5/0.30/000/00 33 SSW VEC1 33 SSW RMY 34
10/17 57/34/46/-6/T/053/08 35 NW VEC1 35 NNW RMY 37
10/18 55/32/44/-8/0.00/656/100 18 SSE VEC1 18 SSE RMY 18
10/19 57/42/50/-1/0.00/633/97 20 NNE VEC1 19 NNE RMY 19
10/20 60/40/50/-1/0.00/560/86 36 NE VEC1 36 NE RMY 37
10/21 53/44/49/-2/0.00/266/41 35 NE VEC1 35 NE RMY 34
10/22 61/43/52/+2/0.00/484/75 32 NNE VEC1 32 NNE RMY 33
10/23 54/40/47/-3/0.00/642/100 29 N VEC1 29 N RMY 28
10/24 61/36/49/-1/0.00/…/.. 12 NNW VEC1 12 NNW RMY 12
10/25 66/44/55/+6/0.00/…/.. 21 WSW VEC1 20 WSW RMY 21
10/26 70/43/57/+8/0.00/…/.. 29 N VEC1 29 N RMY 30
10/27 56/40/48/-1/0.00/…/.. 30 N VEC1 29 N RMY 28
10/28 55/33/44/-4/0.00/…/.. 21 SSW VEC1 20 SW RMY 20
10/29 67/47/57/+9/0.00/…/.. 31 SW VEC1 31 SW RMY 31