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Tuesday, September 8, 2026

September 8, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, SEPTEMBER 8, 2026 ALL TIMES ARE…

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

TUESDAY, SEPTEMBER 8, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0517E
SUNSET:  1806E

ANOTHER PLEASANT DAY WITH A MIX OF SUN AND CLOUDS….

Today has been another very pleasant September day. Skies have had
a varying amount of clouds throughout the day, mainly of the middle
and high variety. We’ve seen a decent amount of sunshine as well,
so overall it’s been a mix of sun and clouds.

Temperatures are very similar to yesterday with readings slightly
above normal after a bit of a chilly start. The low this morning
was in the upper 50s, but readings quickly recovered reaching the
upper 70s by early this afternoon. Dew point values have been slowly
creeping upwards, from the low 50s early this morning to the upper
50s by early this afternoon. Regardless, the air mass remains on
the comfortable side today.

Winds have been fairly steady, but not as strong as yesterday.
A west-northwest to northwest flow has been the theme. The average
speed for the day so far is around 10mph. The peak gust so far for
the day is 22mph, which occurred just after 10am this morning.

Visibility has been fairly steady at around 50-60 miles throughout
the day, again very similar to yesterday.

The maximum temperature so far today is 80F, which is 4 degrees
above the normal high of 76F. The minimum temperature since
midnight is 58F, which is equal to the normal low.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken cirrocumulus, broken cirrus
Temperature: 61F; Dew Point: 53F; Relative Humidity: 74%
Wind: WNW @ 10 kts
Sea-level pressure: 1022.8 mb; 30.20 in. Hg: rising, then more rapidly
Visibility: 60 miles
6-hr Max temp: 61F
6-hr Min temp: 58F
24-hr Precip: 0.00 inches
BHO SA 1155 E200 BKN 250 BKN 60 228/61/53/2910/020/ 8/009 53014
10061 20058

10 A.M.
Weather: Broken altocumulus
Temperature: 77F; Dew Point: 57F; Relative Humidity: 51%
Wind: NNW @ 9G17 kts
Sea-level pressure: 1023.0 mb; 30.21 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E100 BKN 60 230/77/57/3309G17/021/ 8/050 50002

1 P.M.
Weather: Scattered cumulus, scattered altocumulus/lenticularis,
scattered cirrus
Temperature: 79F; Dew Point: 58F; Relative Humidity: 48%
Wind: NW @ 7 kts, wind WNW variable N
Sea-level pressure: 1022.5 mb; 30.19 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 79F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 55 SCT 120 SCT 250 -SCT 60 225/79/58/3207/019/
WND 29V35/ 8/241 58005 10079 20061

————————————————————–

SUMMARY FOR MONDAY, SEPTEMBER 7, 2026

TEMPERATURE (DEGREES F)
MAX…….79   NORMAL…..76
MIN…….52   NORMAL…..59
MEAN……66   NORMAL…..67

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH (SEP)…………………-13 [-2.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH (SEP)………..6  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………….9  DEPARTURE…….-17
TOTAL HEATING UNITS LAST SEASON TO DATE……….26  DEPARTURE…….-17

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..1  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH (SEP)……….15  DEPARTURE…….-15
TOTAL COOLING UNITS FOR THE SEASON…………..769  DEPARTURE……+143
TOTAL COOLING UNITS LAST SEASON TO DATE………699  DEPARTURE…….+70

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)………..30 NW   @   04:45 P.M.
VECTOR #1 (1-Sec)……….30 NW   @   04:45 P.M.
VECTOR #2 (1-Sec)……….30 WNW  @   03:10 P.M.
DAVIS #1……………….28 WNW  @   02:19 P.M.
DAVIS #2 ………………26 WNW  @   03:26 P.M.
RMY #1 (Instantaneous)…..30 NW   @   02:23 P.M.
RMY #2 (Instantaneous)…..31 NW   @   05:11 P.M.
MERLIN…………………28 NW
RICHARDS (C5C) (Inst)……28 NW   @   02:23 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 WNW  @   03:11 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 WNW  @   03:11 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 NW   @   03:27 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 W    @   03:10 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 NW   @   02:25 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 NW   @   04:45 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 NW   @   03:27 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 NW   @   04:45 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….11.6 NW [278 total miles] VECTOR #1……………..11.4
VECTOR #2……………..12.1
DAVIS #1………………11.7 NW
DAVIS #2………………10.9 NNW
RMY #1………………..11.4 NW
RMY #2………………..11.6 NW
RICHARDS (C5C)…………11.7

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH (SEP)……..1.01 DEPARTURE…..+0.18
TOTAL PRECIPITATION FOR THE YEAR (2026)…….27.00 DEPARTURE…..-8.44

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR SEPTEMBER 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

9/1  69/57/63/-6/0.21/…/..             15 SSW VEC1 15 E   RMY 14
9/2  76/58/67/-2/0.00/…/..             21 ESE VEC1 21 ESE RMY 20
9/3  74/60/67/-1/0.45/…/..             24 SSE VEC1 24 SSE RMY 23
9/4  84/63/74/+6/0.00/…/..             24 NNW VEC1 25 NNW RMY 24
9/5  71/60/66/-2/T/…/..                24 ENE VEC1 24 ENE RMY 25
9/6  69/53/61/-7/0.35/…/..             24 NE  VEC1 24 NNE RMY 27
9/7  79/52/66/-1/0.00/…/..             30 NW  VEC1 30 NW  RMY 30

9/8 The low since midnight is 58F, the daily normal low is 58F.

————————————————————–

SEPTEMBER DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR SEPTEMBER 8
HIGH 97F IN 2015
LOW 42F IN 1978
PRECIP 1.51 INCHES IN 2011
PEAK GUST 45 MPH S IN 2012

RECORDS FOR SEPTEMBER 9
HIGH 92F IN 2015
LOW 41F IN 1938
PRECIP 1.97 INCHES IN 1969
PEAK GUST 52 MPH WNW IN 1969, NW IN 1978

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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