Sunday, October 25, 2026

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

SUNDAY, OCTOBER 25, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0609E
SUNSET: 1647E

WARMER TEMPERATURES, ALL DAY SUN WITH LIGHT AND VARIABLE WIND….

This morning we had one of those rare “not a cloud in the sky”
observations which is hard to do from our vantage point. Since
then, there has been some cloud development offshore to our
southeast, but over land it has been bright blue skies for days!

Temperatures dipped down to the mid 40’s which was a bit warmer
than the area due to the inversion layer. Even Mt. Washington was
warmer than us at 7am today! With all day sunshine and warmer
air, we have made it to slightly above average temperatures for
this time of year. Dew points have also remained low, indicative
of the continued high and dry conditions we have had over the
past few days. Dew points have ranged from the upper 20’s to mid
30’s.

Winds have been a bit all over the place today, with light and
variable conditions throughout the day. In the last couple of
hours, the wind has been more westerly, but it has been to light
the it has been variable. The average speed for the day so far
is only around 5mph. The peak gust so far for the day is 13 mph,
which occurred just before 1pm this afternoon.

Visibility has been excellent again today with a view of 80
miles all day. There was a layer of smoke this morning along
the horizon, but it has since dissipated.

The maximum temperature so far today is 65F, which is 7 degrees
above the normal high of 58F. The minimum temperature since
midnight is 44F, which is 3 degrees above the normal low of 41F.

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Today’s Observations:

7 A.M.
Weather: Clear
Temperature: 50F; Dew Point: 27F; Relative Humidity: 41%
Wind: N @ 4 kts, wind light
Sea-level pressure: 1034.7 mb; 30.55 in. Hg: rising, then more rapidly
Visibility: 80 miles, patchy ground fog ENE-SE
6-hr Max temp: 50F
6-hr Min temp: 44F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 80 347/50/27/3604/055/ PTCHY GF ENE-SE WND LGT/ 8/000
53005 10050 20044

10 A.M.
Weather: Clear, few stratocumulus distant SE
Temperature: 57F; Dew Point: 37F; Relative Humidity: 47%
Wind: SE @ 3 kts, wind light
Sea-level pressure: 1034.8 mb; 30.56 in. Hg: rising, then falling
Visibility: 80 miles, smoke layer WNW-ENE
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 80 348/57/37/1403/056/ FEW SC DSNT SE K LYR WNW-ENE
WND LGT/ 8/500 50001

1 P.M.
Weather: Clear, few stratocumulus distant SE-SSE
Temperature: 65F; Dew Point: 28F; Relative Humidity: 24%
Wind: SW @ 3 kts, wind light and variable
Sea-level pressure: 1028.8 mb; 30.50 in. Hg: falling, then more rapidly
Visibility: 80 miles
6-hr Max temp: 65F
6-hr Min temp: 50F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 80 328/65/28/2303/050/ FEW SC DSNT SE-SSE WND L/V/
8/500 58020 10065 20050

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SUMMARY FOR SATURDAY, OCTOBER 24, 2026

TEMPERATURE (DEGREES F)
MAX…….61 NORMAL…..58
MIN…….36 NORMAL…..41
MEAN……49 NORMAL…..50

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH (OCT)…………………+29 [+1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY…………….16 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH (OCT)………249 DEPARTURE…….-27
TOTAL HEATING UNITS FOR THE SEASON…………..370 DEPARTURE…….-24
TOTAL HEATING UNITS LAST SEASON TO DATE………287 DEPARTURE…….+83

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)………..12 NNW @ 04:43 A.M.
VECTOR #1 (1-Sec)……….12 NNW @ 07:48 A.M.
VECTOR #2 (1-Sec)……….12 SE @ 07:27 P.M.
DAVIS #1……………….12 SE @ 08:37 P.M.
DAVIS #2 ………………11 SE @ 08:16 P.M.
RMY #1 (Instantaneous)…..12 NNW @ 04:43 A.M.
RMY #2 (Instantaneous)…..12 SE @ 07:27 P.M.
MERLIN…………………11 NNW
RICHARDS (C5C) (Inst)……22 NNW @ 07:48 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 NNW @ 04:45 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..10 NNW @ 08:18 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..10 NNW @ 04:48 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………10 SE @ 08:38 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….8 ESE @ 06:40 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..10 NNW @ 04:45 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..10 NNW @ 04:48 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………10 NNW @ 07:49 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..4.6 NNW [110 total miles] VECTOR #1………………5.9
VECTOR #2………………5.9
DAVIS #1……………….5.3 W
DAVIS #2…………………M
RMY #1…………………5.9 WNW
RMY #2…………………5.5 WNW
RICHARDS (C5C)………….6.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH (OCT)……..2.18 DEPARTURE…..-2.04
TOTAL PRECIPITATION FOR THE YEAR (2026)…….39.70 DEPARTURE…..-3.19

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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 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