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Friday, October 9, 2026

October 9, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA FRIDAY, OCTOBER 9, 2026 ALL TIMES ARE…

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

FRIDAY, OCTOBER 9, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0550E
SUNSET:  1712E

WINDY AND MILD UNDER A MIX OF SUN AND CLOUDS….

Today has featured mainly sunny skies, especially earlier this
morning. Diurnal clouds have increased a bit this afternoon
giving a nice mix of sun and clouds. The air mass today is drier
than yesterday, as such the air is clearer allowing for an
excellent view from the summit today. Temperatures are again a
bit above normal, but with the gusty wind and drier air, there
is a bit of a chilly feeling out there.

As mentioned, temperatures are once again running just a touch
above normal today with readings reaching the mid 60s early this
afternoon. The biggest difference from yesterday are the dew
point values, which were a good 10-15F degrees lower today.
Readings have been generally in the mid 40s throughout the day.

Winds are gusty again today generally out of the west and west-
northwest. The average speed for the day so far is around 16mph.
The peak gust for the day so far is 39mph which occurred just
after 11am this morning.

Visibility has been excellent all day with a view of around 70
miles.

The maximum temperature so far today is 66F, which is 2 degrees
above the normal high of 64F. The minimum temperature since
midnight is 47F, which is equal to the normal low.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, few altocumulus/castellanus distant WNW-NNE,
few cirrus distant NW-ENE and distant ESE-SW
Temperature: 50F; Dew Point: 44F; Relative Humidity: 79%
Wind: W @ 13G18 kts
Sea-level pressure: 1018.6 mb; 30.08 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 52F
6-hr Min temp: 47F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 70 186/50/44/2713G18/008/ FEW AC/ACC DSNT WNW-NNE
FEW CI DSNT NW-ENE AND DSNT ESE-SW/ 8/081 53016 10052 20047

10 A.M.
Weather: Scattered cumulus, scattered altocumulus/castellanus,
scattered cirrus
Temperature: 62F; Dew Point: 45F; Relative Humidity: 53%
Wind: W @ 14G26 kts, peak wind WNW 30mph at 9:47 A.M.
Sea-level pressure: 1019.3 mb; 30.10 in. Hg: rising, then steady
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 45 SCT 85 SCT 250 SCT 70 193/62/45/2814G26/010/
PK WND 2926/47/ 8/281 51007

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 66F; Dew Point: 43F; Relative Humidity: 43%
Wind: W @ 14G24 kts, peak wind W 37mph at 12:00 P.M.
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 66F
6-hr Min temp: 50F
6-hr Precip: 0.00 inches
BHO SA 1755 E55 BKN 250 BKN 70 185/66/43/2814G24/008/
PK WND 2832/00/ 8/201 58008 10066 20050

————————————————————–

SUMMARY FOR THURSDAY, OCTOBER 8, 2026

TEMPERATURE (DEGREES F)
MAX…….70   NORMAL…..64
MIN…….53   NORMAL…..47
MEAN……62   NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+7
TOTAL DEPARTURE FOR THE MONTH (OCT)…………………+25 [+2.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..3  DEPARTURE……..-7
TOTAL HEATING UNITS FOR THE MONTH (OCT)……….50  DEPARTURE…….-20
TOTAL HEATING UNITS FOR THE SEASON…………..171  DEPARTURE…….-16
TOTAL HEATING UNITS LAST SEASON TO DATE……….98  DEPARTURE…….+73

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH (OCT)………..9  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE SEASON…………..814  DEPARTURE……+140
TOTAL COOLING UNITS LAST SEASON TO DATE………756  DEPARTURE…….+58

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)………..33 WNW  @   03:48 P.M.*
VECTOR #1 (1-Sec)……….33 SSW  @   12:32 A.M.
VECTOR #2 (1-Sec)……….34 WNW  @   03:42 P.M.*
DAVIS #1……………….35 S    @   01:07 A.M.
DAVIS #2 ………………32 NW   @   03:42 P.M.*
RMY #1 (Instantaneous)…..34 WNW  @   03:48 P.M.
RMY #2 (Instantaneous)…..35 SSW  @   01:07 A.M.
MERLIN…………………33 NW
RICHARDS (C5C) (Inst)……33 WNW  @   03:48 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 WNW  @   04:02 P.M.*
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 WNW  @   12:26 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..24 W    @   12:26 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………25 W    @   12:26 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 SSW  @   01:08 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 SSW  @   12:33 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..24 W    @   12:26 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22 WNW  @   12:26 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….14.8 WNW [354 total miles] VECTOR #1……………..14.5
VECTOR #2……………..15.9
DAVIS #1………………14.6 WSW
DAVIS #2…………………M
RMY #1………………..14.4 W
RMY #2………………..15.6 WSW
RICHARDS (C5C)…………14.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH (OCT)……..0.05 DEPARTURE…..-1.28
TOTAL PRECIPITATION FOR THE YEAR (2026)…….37.57 DEPARTURE…..-2.43

————————————————————–

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 The low since midnight is 47F, the daily normal low is 47F.

————————————————————–

OCTOBER DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR OCTOBER 9
HIGH 82F IN 2011
LOW 29F IN 1907,1937
PRECIP 2.54 INCHES IN 1976
SNOWFALL TRACE IN 1988, 2001
PEAK GUST 81e MPH S IN 1976 (RECORD FOR MONTH)

RECORDS FOR OCTOBER 10
HIGH 85F IN 1949
LOW 27F IN 1929
PRECIP 2.02 INCHES IN 1998
SNOWFALL 6.8 INCHES IN 1979 (RECORD FOR MONTH)
PEAK GUST 59 MPH WNW IN 1958

TODAY’S REPORT PREPARED BY: Matt Douglas

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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