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Sunday, September 6, 2026

September 6, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, SEPTEMBER 6, 2026 ALL TIMES ARE…

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

SUNDAY, SEPTEMBER 6, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0515E
SUNSET:  1810E

OVERCAST AND RAIN TO START THE DAY WITH CLEARING AND SUNSHINE
IN THE AFTERNOON….

Plenty of clouds for the first half of the day, with passing
showers in the area during the early morning that brought the Blue
Hill area with 0.10 inches of rain. Most of the remaining morning
skies remained mostly cloudy with a few sprinkles that only netted
a trace by the early afternoon. It was actively raining, though
light at the last daily observation. Shortly after that passing
rain event, skies began to clear and sunshine has once again made
its appearance.

Temperatures struggled to rise today, mostly due to cooler air
aloft and overcast skies. Temperatures crested to around 65F before
falling to around 62F by 1pm. After the rain moved out of the area
the sun came out and temperatures have been on the rise since.
Dewpoints have been in the upper 50’s for much of the day, which
is more comfortable than yesterday but still a bit summer-like.

Winds were mostly out of the north-northwest during the overnight
period, and has since moved to the east-northeast since mid morning.
Winds have been on the light side, with an average speed for the day
so far only around 6mph. The peak gust so far is 16mph, which
occurred just after 8am this morning.

Visibility held steady at around 40 miles until some passing rain
showers came through during the early afternoon. Visibility dropped
from 15-30 miles and then improved to 50 shortly after.

The maximum temperature so far today is 65F, which is 11 degrees
below the normal high of 76F. The minimum temperature since
midnight is 55F, which is 4 degrees below the normal low of 59F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, overcast altocumulus, few breaks
in overcast
Temperature: 58F; Dew Point: 58F; Relative Humidity: 100%
Wind: NNW @ 5 kts, wind light
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising, then more rapidly
Visibility: 40 miles, thin fog
6-hr Max temp: 59F
6-hr Min temp: 55F
24-hr Precip: 0.10 inches
BHO SA 1155 55 SCT E100 OVC 40 159/58/58/3305/000/ FEW BINOVC ALQDS
THN F ALQDS WND LGT/ 8/55/ 53018 6010/ 70010 10059 20055

10 A.M.
Weather: Overcast altocumulus, few stratus fractus NNW-N and ESE-S, few
breaks in overcast N-NE, virga SE
Temperature: 60F; Dew Point: 55F; Relative Humidity: 83%
Wind: NE @ 5 kts, wind light
Sea-level pressure: 1016.8 mb; 30.03 in. Hg: rising, then more rapidly
Visibility: 40 miles
3-hr Precip: Trace
BHO SA 1455 E85 OVC 40 168/60/55/0405/003/ FEW STFRA NNW-N AND ESE-S
FEW BINOVC N-NE VIRGA SE WND LGT/ 8/75/ 53009 6000/

1 P.M.
Weather: Light drizzle, overcast altocumulus, few stratocumulus N-ESE,
few breaks in overcast N-SE, virga S
Temperature: 62F; Dew Point: 57F; Relative Humidity: 82%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling, then rising
Visibility: 25 miles, 15 miles SSW-NW, thin fog S-NNW
6-hr Max temp: 65F
6-hr Min temp: 58F
6-hr Precip: Trace
BHO SA 1755 E75 OVC 25L- 161/62/57/0605/001/ FEW SC N-ESE FEW BINOVC
N-SE VSBY 15 SSW-NW VIRGA S THN F S-NNW WND LGT/ 8/65/ 55007 6000/
10065 20058

————————————————————–

SUMMARY FOR SATURDAY, SEPTEMBER 5, 2026

TEMPERATURE (DEGREES F)
MAX…….71   NORMAL…..77
MIN…….60   NORMAL…..59
MEAN……66   NORMAL…..68

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-2
TOTAL DEPARTURE FOR THE MONTH (SEP)………………….-5 [-0.8 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)………..2  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………….5  DEPARTURE…….-18
TOTAL HEATING UNITS LAST SEASON TO DATE……….21  DEPARTURE…….-16

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..1  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH (SEP)……….14  DEPARTURE……..-8
TOTAL COOLING UNITS FOR THE SEASON…………..768  DEPARTURE……+150
TOTAL COOLING UNITS LAST SEASON TO DATE………690  DEPARTURE…….+78

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)………..24 ENE  @   01:29 P.M.
VECTOR #1 (1-Sec)……….24 ENE  @   01:02 P.M.
VECTOR #2 (1-Sec)……….26 ENE  @   12:45 P.M.
DAVIS #1……………….23 E    @   01:28 P.M.
DAVIS #2 ………………24 E    @   12:53 P.M.
RMY #1 (Instantaneous)…..25 ENE  @   01:48 P.M.
RMY #2 (Instantaneous)…..25 ENE  @   12:53 P.M.
MERLIN…………………22 E
RICHARDS (C5C) (Inst)……22 E    @   01:53 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 ENE  @   01:49 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 ENE  @   12:51 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 ENE  @   01:49 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 E    @   01:49 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 E    @   01:49 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 ENE  @   01:49 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 ENE  @   01:49 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 ENE  @   01:49 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..8.6 ENE [206 total miles] VECTOR #1………………8.5
VECTOR #2………………9.2
DAVIS #1……………….8.9 NNE
DAVIS #2…………………M
RMY #1…………………8.7 NNE
RMY #2…………………9.0 NNE
RICHARDS (C5C)………….9.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.10 DEPARTURE…..-0.02
TOTAL PRECIPITATION FOR THE MONTH (SEP)……..0.76 DEPARTURE…..+0.18
TOTAL PRECIPITATION FOR THE YEAR (2026)…….26.75 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 The low since midnight is 55F, the daily normal low is 59F.

————————————————————–

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 6
HIGH 92F IN 1900, 2018
LOW 39F IN 1888
PRECIP 3.19 INCHES IN 1890
PEAK GUST 78e MPH SE IN 1979 (TROPICAL STORM DAVID)

RECORDS FOR SEPTEMBER 7
HIGH 92F IN 2007, 2015, 2023
LOW 40F IN 1888
PRECIP 2.91 INCHES IN 1891
PEAK GUST 58e MPH W IN 1941

TODAY’S REPORT PREPARED BY: Amanda Joly

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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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