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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, SEPTEMBER 2, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0511E
SUNSET: 1816E
DRIER WITH FILTERED SUNSHINE TODAY AND A BIT MILDER….
Today has turned out to be better than originally outlooked a
couple of days ago. We have been dry all day with some filtered
sunshine through mid and high level clouds throughout the day.
Some low level ocean clouds have also been floating by,
although those have been gradually fading away.
Temperatures are a bit milder than yesterday, but still below
the expected values for early September. Readings have reached
the mid 70s early this afternoon after starting the day in the
upper 50s. There has still been a decent amount of moisture in
the air most of the day thanks to the onshore flow, but the dew
point has been trending downward early this afternoon from the
low 60s to the mid 50s.
Winds have been fairly steady today. The direction has been
very gradually veering from the northeast to the south-southeast
as the day has progressed. The average speed for the day so far
is around 8mph. Gusts have been trying to pick up a bit early
this afternoon as we’ve seen a peak gust so far of 21mph, which
occurred just before 1pm.
Visibility has been gradually improving throughout the day. The
view was only 20-30 miles early this morning, but was up to
around 50 miles by early this afternoon.
The maximum temperature so far today is 75F, which is 3 degrees
below the normal high of 78F. The minimum temperature since
midnight is 58F, which is 2 degrees below the normal low of 60F.
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As we close out August and meteorological summer, we have some
rankings to share per our Chief Scientist, Mike Iacono.
August 2026 tied for the sixth warmest on record, and Summer
2026 tied for the warmest on record.
BHO Warmest August Approx. 24-Hour Mean Temperature, deg F (1885-2026):
1) 74.1 in 2016
2) 73.9 in 2022
3) 73.4 in 2018
4) 72.6 in 2012
72.6 in 2021
6) 72.5 in 1988
72.5 in 2026
8) 72.4 in 2015
BHO Warmest Summer (Jun-Aug) Approx. 24-hour Mean Temperature, deg F (1885-2026):
1) 71.6 in 2016
71.6 in 2026
3) 71.5 in 2022
4) 71.3 in 2010
5) 71.1 in 2020
6) 70.9 in 2018
7) 70.8 in 1949
8) 70.7 in 2024
PRELIMINARY STATS FOR AUGUST 2026
TEMPERATURE, Deg. F
Avg. Max. 82.4 [+2.2]
Avg. Min. 63.5 [+0.9]
Mean 73.0 [+1.6]
24-hour corrected mean: 72.5
Max. for month: 92F on the 7th
Min. for month: 57F on the 16th
HEATING DEGREE DAYS
Total heating units: 1 [-010]
Total for the season: 3 [-015]
Total for last season: 20
COOLING DEGREE DAYS
Total cooling units: 257 [+048]
Total for the season: 754 [+158]
Total for last season: 672
PRECIPITATION, Inches
Total: 1.89 [-2.02]
Greatest in 24 hrs: 0.71 on the 2nd-3rd
SNOWFALL, Inches
Total: 0.0 [ 0.0]
Greatest in 24 hrs: N/A
WIND, mph
Avg. uncorrected wind speed: 9.0 mph
Avg. corrected wind speed: 9.7 mph
Prevailing wind direction: West [15%]
Peak gust and direction: 44 SSW on the 3rd
SUNSHINE:
Campbell-Stokes card minutes: 16776 of a possible 24780, or 68%
Astronomical total minutes: 17410 of a possible 25724 or 68%
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Today’s Observations:
7 A.M.
Weather: Broken stratocumulus, overcast altocumulus/altostratus,
few thin spots in overcast all quadrants, few lower stratus fractus
all quadrants
Temperature: 64F; Dew Point: 62F; Relative Humidity: 96%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1022.9 mb; 30.21 in. Hg: rising, then more rapidly
Visibility: 30 miles, thin fog, patchy ground fog
6-hr Max temp: 64F
6-hr Min temp: 59F
24-hr Precip: 0.21 inches
BHO SA 1155 E13 BKN 80 OVC 30 229/64/62/0605/021/ FEW THN SPTS
IOVC ALQDS FEW LWR STFRA ALQDS THN F ALQDS PTCHY GF ALQDS
VSBY 20 W-NW WND LGT/ 8/57/ 53016 70021 10064 20059
10 A.M.
Weather: Broken stratocumulus, broken altocumulus, broken cirrus
Temperature: 70F; Dew Point: 60F; Relative Humidity: 69%
Wind: ESE @ 8G14 kts
Sea-level pressure: 1023.1 mb; 30.21 in. Hg: falling, then rising
Visibility: 40 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E60 BKN 75 BKN 250 BKN 40 231/70/60/1108G14/021/
8/551 53002
1 P.M.
Weather: Broken cirrus, few stratocumulus all quadrants,
few altocumulus distant all quadrants
Temperature: 75F; Dew Point: 57F; Relative Humidity: 54%
Wind: ESE @ 9G18 kts
Sea-level pressure: 1021.8 mb; 30.17 in. Hg: falling, then more rapidly
Visibility: 50 miles
6-hr Max temp: 75F
6-hr Min temp: 64F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 BKN 50 218/75/57/1109G18/017/ FEW SC ALQDS
FEW AC DSNT ALQDS/ 8/551 58013 10075 20064
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SUMMARY FOR TUESDAY, SEPTEMBER 1, 2026
TEMPERATURE (DEGREES F)
MAX…….69 NORMAL…..78
MIN…….57 NORMAL…..60
MEAN……63 NORMAL…..69
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-6
TOTAL DEPARTURE FOR THE MONTH (SEP)………………….-6 [-6.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..2 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH (SEP)………..2 DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE SEASON…………….5 DEPARTURE…….-14
TOTAL HEATING UNITS LAST SEASON TO DATE……….21 DEPARTURE…….-16
COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH (SEP)………..0 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE SEASON…………..754 DEPARTURE……+153
TOTAL COOLING UNITS LAST SEASON TO DATE………672 DEPARTURE…….+82
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)………..15 SSW @ 01:23 P.M.*
VECTOR #1 (1-Sec)……….15 E @ 12:07 P.M.
VECTOR #2 (1-Sec)……….15 S @ 01:22 P.M.
DAVIS #1……………….15 E @ 12:07 P.M.
DAVIS #2 ………………17 S @ 12:17 P.M.
RMY #1 (Instantaneous)…..14 SSW @ 01:19 P.M.
RMY #2 (Instantaneous)…..15 S @ 01:22 P.M.
MERLIN…………………13 E
RICHARDS (C5C) (Inst)……14 SSW @ 01:23 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………10 E @ 12:11 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..11 E @ 12:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..11 S @ 01:22 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………12 E @ 12:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………12 S @ 01:23 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..11 E @ 12:08 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..11 S @ 01:22 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………11 E @ 12:08 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..5.0 ESE [120 total miles]
VECTOR #1………………5.5
VECTOR #2………………5.8
DAVIS #1……………….5.1 SSE
DAVIS #2……………….5.0 SSE
RMY #1…………………5.6 SSE
RMY #2…………………5.7 SSE
RICHARDS (C5C)………….5.7
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.21 DEPARTURE…..+0.10
TOTAL PRECIPITATION FOR THE MONTH (SEP)……..0.21 DEPARTURE…..+0.10
TOTAL PRECIPITATION FOR THE YEAR (2026)…….26.20 DEPARTURE…..-8.52
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PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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
8/1 87/64/76/+3/0.00/719/83 23 SSW VEC1 24 S RMY 24
8/2 83/68/76/+3/0.01/406/47 29 S VEC1 28 S RMY 30
8/3 76/65/71/-2/0.70/121/14 44 SSW VEC1 44 SSW RMY 45 TSTM
8/4 85/61/73/0/0.00/860/100 18 W VEC1 18 W RMY 19
8/5 87/63/75/+2/0.00/694/81 21 W VEC1 21 WSW RMY 20
8/6 91/68/80/+7/0.00/539/63 21 SW VEC1 21 SW RMY 22
8/7 92/73/83/+10/T/793/93 20 SW VEC1 20 SW RMY 21
8/8 90/70/80/+8/T/723/85 29 W VEC1 29 WSW RMY 28
8/9 88/69/79/+7/0.00/814/96 28 W VEC1 27 W RMY 28
8/10 87/66/77/+5/0.00/609/72 24 W VEC1 24 W RMY 25
8/11 86/67/77/+5/0.00/792/94 26 WNW VEC1 26 WNW RMY 28
8/12 85/64/75/+3/T/781/93 18 W VEC1 18 W RMY 18
8/13 85/65/75/+3/0.01/679/81 26 WNW VEC1 25 WNW RMY 26
8/14 83/62/73/+1/0.00/710/85 21 NW VEC1 21 NNW RMY 22
8/15 81/59/70/-2/0.00/691/83 18 WNW VEC1 19 NNE RMY 19
8/16 82/57/70/-2/T/722/87 31 SW VEC1 31 SW RMY 31
8/17 75/63/69/-3/0.03/008/01 29 S VEC1 28 S RMY 32
8/18 80/64/72/+1/0.00/429/52 18 SSE VEC1 18 SSE RMY 18
8/19 87/67/77/+6/0.00/708/86 28 W VEC1 27 W RMY 28
8/20 87/62/75/+4/0.14/459/56 26 NNW VEC1 26 NNW RMY 27
8/21 67/61/64/-7/0.21/000/00 22 ENE VEC1 22 ENE RMY 23
8/22 68/63/66/-5/0.01/000/00 21 NE VEC1 20 NE RMY 22
8/23 71/62/67/-4/0.62/154/19 20 SSW VEC1 20 S RMY 20
8/24 82/62/72/+1/0.00/786/97 31 SW VEC1 31 SW RMY 32
8/25 80/58/69/-1/0.00/791/98 23 W VEC1 23 W RMY 24
8/26 82/59/71/+1/0.00/725/90 18 S VEC1 19 S RMY 19
8/27 82/62/72/+2/0.00/465/58 36 SSW VEC1 37 S RMY 33
8/28 85/68/77/+7/0.00/439/55 21 SSW VEC1 21 SSW RMY 22
8/29 78/58/68/-2/0.00/772/97 23 NNW VEC1 23 NNW RMY 24
8/30 85/60/73/+4/0.16/365/46 30 W VEC1 30 W RMY 31
8/31 77/60/69/0/T/656/83 20 SSW VEC1 20 SSW RMY 19
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AUGUST DAILY RECORDS TO DATE
8/7 TIED RECORD HIGH MINIMUM TEMPERATURE OF 73F;
ALSO SET IN 2018 AND 2022
————————————————————–
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 The low since midnight is 58F, the daily normal low is 60F.
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SEPTEMBER DAILY RECORDS TO DATE
NONE.
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR SEPTEMBER 2
HIGH 99F IN 1953 (SEPTEMBER MAXIMUM RECORD)
LOW 44F IN 1909
PRECIP 2.73 INCHES IN 1947
PEAK GUST 55e MPH WNW IN 1944
RECORDS FOR SEPTEMBER 3
HIGH 95F IN 1929
LOW 43F IN 1893
PRECIP 3.82 INCHES IN 1972 (TROPICAL STORM CARRIE)
PEAK GUST 58 MPH NNE IN 1972 (TROPICAL STORM CARRIE)
TODAY’S REPORT PREPARED BY: Matt Douglas
