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Thursday, September 24, 2026

September 24, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, SEPTEMBER 24, 2026 ALL TIMES ARE…

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

THURSDAY, SEPTEMBER 24, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0534E
SUNSET:  1738E

MAINLY SUNNY, COOL, AND BRISK….

Today has once again featured a mix of sun and clouds throughout
the day. A brisk onshore flow continues which is in turn helping
to keep temperatures on the cooler than normal side. If all of
this sounds familiar, that’s because today’s weather is pretty
much a carbon copy of yesterday.

Temperatures have reached the low 60s today, but with the brisk
wind, it feels a bit cooler. The dew point has generally been
in the upper 40s today with a brief period where it did reach
the low 50s during the morning.

Winds continue on the busy side today, out of the northeast
to east-northeast. The average speed for the day so far is around
12mph. It’s been rather gusty again today as well with frequent
gusts in the 25-30mph range. The peak gust for the day so far is
33mph, which occurred just after 11:30am this morning.

Visibility has been decent again today with a view of 60-70
miles once again.

The maximum temperature so far today is 61F, which is 9 degrees
below the normal high of 70F. The minimum temperature since
midnight is 46F, which is 7 degrees below the normal low of 53F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, few lower stratus fractus all quadrants
Temperature: 50F; Dew Point: 48F; Relative Humidity: 93%
Wind: NNE @ 10G17 kts
Sea-level pressure: 1032.6 mb; 30.49 in. Hg: rising, then steady
Visibility: 60 miles
6-hr Max temp: 52F
6-hr Min temp: 46F
24-hr Precip: 0.00 inches
BHO SA 1155 E10 BKN 60 326/50/48/0310G17/049/ FEW LWR STFRA ALQDS/
8/600 51003 10052 20046

10 A.M.
Weather: Broken stratocumulus
Temperature: 58F; Dew Point: 49F; Relative Humidity: 72%
Wind: ENE @ 14G25 kts, peak wind ENE 31mph at 9:36 A.M.
Sea-level pressure: 1032.8 mb; 30.50 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E25 BKN 70 328/58/49/0614G25/050/ PK WND 0627/36/
8/500 50002

1 P.M.
Weather: Scattered stratocumulus, broken cirrus
Temperature: 60F; Dew Point: 47F; Relative Humidity: 60%
Wind: NE @ 14G29 kts, peak wind NE 33mph at 12:51 P.M.
Sea-level pressure: 1031.0 mb; 30.45 in. Hg: falling, then more rapidly
Visibility: 70 miles
6-hr Max temp: 61F
6-hr Min temp: 50F
6-hr Precip: 0.00 inches
BHO SA 1755 30 SCT 250 BKN 70 310/60/47/0514G29/045/
PK WND 0529/51/ 8/501 58018 10061 20050

————————————————————–

SUMMARY FOR WEDNESDAY, SEPTEMBER 23, 2026

TEMPERATURE (DEGREES F)
MAX…….63   NORMAL…..70
MIN…….50   NORMAL…..53
MEAN……57   NORMAL…..62

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH (SEP)…………………-18 [-1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..8  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH (SEP)……….57  DEPARTURE………0
TOTAL HEATING UNITS FOR THE SEASON……………60  DEPARTURE…….-15
TOTAL HEATING UNITS LAST SEASON TO DATE……….59  DEPARTURE……..+1

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH (SEP)……….51  DEPARTURE…….-17
TOTAL COOLING UNITS FOR THE SEASON…………..805  DEPARTURE……+142
TOTAL COOLING UNITS LAST SEASON TO DATE………713  DEPARTURE…….+92

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)………..39 ENE  @   12:25 P.M.
VECTOR #1 (1-Sec)……….38 ENE  @   08:44 A.M.
VECTOR #2 (1-Sec)……….38 NE   @   12:24 P.M.
DAVIS #1……………….37 E    @   08:45 A.M.
DAVIS #2 ………………35 E    @   08:40 A.M.
RMY #1 (Instantaneous)…..39 ENE  @   08:27 A.M.
RMY #2 (Instantaneous)…..40 NE   @   12:27 P.M.
MERLIN…………………36 ENE
RICHARDS (C5C) (Inst)……37 E    @   08:45 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 E    @   08:48 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 E    @   08:34 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25 ENE  @   08:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………26 E    @   08:46 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………25 E    @   08:46 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 E    @   08:45 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 ENE  @   08:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………24 ENE  @   08:46 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….14.7 ENE [353 total miles] VECTOR #1……………..13.6
VECTOR #2……………..15.4
DAVIS #1………………15.1 ENE
DAVIS #2………………14.0 ENE
RMY #1………………..13.9 ENE
RMY #2………………..14.9 NE
RICHARDS (C5C)…………14.2

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH (SEP)……..2.26 DEPARTURE…..-0.75
TOTAL PRECIPITATION FOR THE YEAR (2026)…….28.25 DEPARTURE…..-9.37

————————————————————–

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/-6/0.21/008/01             15 SSW VEC1 15 E   RMY 14
9/2  76/58/67/-2/0.00/393/50             21 ESE VEC1 21 ESE RMY 20
9/3  74/60/67/-1/0.45/196/25             24 SSE VEC1 24 SSE RMY 23
9/4  84/63/74/+6/0.00/624/80             24 NNW VEC1 25 NNW RMY 24
9/5  71/60/66/-2/T/412/53                24 ENE VEC1 24 ENE RMY 25
9/6  69/53/61/-7/0.35/364/47             24 NE  VEC1 24 NNE RMY 27
9/7  79/52/66/-1/0.00/732/95             30 NW  VEC1 30 NW  RMY 30
9/8  80/58/69/+2/0.00/546/71             23 WNW VEC1 22 NNW RMY 24
9/9  80/58/69/+2/0.02/130/17             36 SSW VEC1 36 SSW RMY 36
9/10 84/67/76/+10/T/641/84               44 W   VEC1 43 W   RMY 47
9/11 77/59/68/+2/0.00/654/86             23 NW  VEC1 23 NW  RMY 25
9/12 77/55/66/0/0.00/667/88              23 SSW VEC1 23 SSW RMY 22
9/13 67/60/64/-1/0.98/000/00             25 SE  VEC1 26 SE  RMY 24
9/14 72/53/63/-2/T/572/76                32 NNW VEC1 32 NNW RMY 34
9/15 68/48/58/-7/0.00/727/97             18 S   VEC1 18 SE  RMY 18
9/16 78/53/66/+2/0.00/522/70             21 SW  VEC1 21 WSW RMY 21
9/17 82/63/73/+9/0.03/394/53             25 SW  VEC1 25 SW  RMY 27
9/18 79/58/69/+6/T/636/86                26 N   VEC1 26 NNW RMY 27
9/19 63/50/57/-6/0.00/531/72             21 N   VEC1 20 N   RMY 20
9/20 61/51/56/-7/0.11/000/00             21 SSE VEC1 22 SSE RMY 21
9/21 64/51/58/-4/0.11/542/74             24 ENE VEC1 23 ENE RMY 23
9/22 60/52/56/-6/0.00/481/66             32 ENE VEC1 32 ENE RMY 33
9/23 63/50/57/-5/0.00/566/78             39 ENE VEC1 38 ENE RMY 39

9/24 The low since midnight is 46F, the daily normal low is 53F.

————————————————————–

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 24
HIGH 87F IN 1959
LOW 33F IN 1885,1950,1963
PRECIP 1.19 INCHES IN 1955
PEAK GUST 54e MPH SW IN 1940

RECORDS FOR SEPTEMBER 25
HIGH 87F IN 1970
LOW 31F IN 1950
PRECIP 2.68 INCHES IN 1961
PEAK GUST 63 MPH SSW IN 1991

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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