Monday, August 31, 2026

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

MONDAY, AUGUST 31, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0508E
SUNSET: 1820E

A FEW SHOWERS LAST EVENING WITH A BACKDOOR FRONT, MUCH COOLER AND
MORE COMFORTABLE TODAY….

A backdoor cold front slipped through the area last evening
bringing a few rain showers with it. 0.16″ of rain was measured
here at Blue Hill, however, this was only a proverbial drop in
the bucket compared to the monthly and annual rainfall deficit
we’re currently running.

Today featured plenty of sunshine this morning, but much like
yesterday, clouds have overtaken the sky this afternoon as they
increase ahead of our next system approaching the region.

The air mass behind the front is cooler and less humid with
temperatures only rising to the mid 70s early this afternoon. As
mentioned, the air mass is comfortable as a bit of drier air
filtered down from the north this morning. Dew point values
dropped from the low 60s early this morning to the mid 50s for
the balance of the day so far. By far a very comfortable day
overall for the last day of August!

Winds were steady overnight, but then dropped off quite a bit
by the mid morning hours today. The wind shifted from north
to the east early this morning, but has since gone more into
the south this afternoon. The average for the day so far is
only around 7mph. The peak gust for the say so far occurred
during the wee hours, just after 2am, with a value of just
16mph.

Visibility has once again been pretty decent today. We started
with a view of around 50 miles early this morning, then rising
to around 60 miles for the rest of the day so far.

The maximum temperature so far today is 76F, which is 2 degrees
below the normal high of 78F. The minimum temperature since
midnight is 60F, which is equal to the normal low.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered cirrocumulus, scattered cirrus, few stratocumulus
all quadrants
Temperature: 64F; Dew Point: 61F; Relative Humidity: 89%
Wind: NE @ 7 kts
Sea-level pressure: 1020.9 mb; 30.15 in. Hg: rising, then more slowly
Visibility: 50 miles
6-hr Max temp: 64F
6-hr Min temp: 60F
24-hr Precip: 0.16 inches
BHO SA 1155 220 SCT 250 SCT 50 209/64/61/0507/015/ FEW SC ALQDS/
8/509 51015 70016 10064 20060

10 A.M.
Weather: Scattered cirrus, few stratocumulus all quadrants
Temperature: 70F; Dew Point: 54F; Relative Humidity: 56%
Wind: NE @ 4 kts, wind light
Sea-level pressure: 1021.8 mb; 30.17 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 250 SCT 60 218/70/54/0404/017/ FEW SC ALQDS WND LGT/
8/501 51009

1 P.M.
Weather: Scattered cirrostratus, broken cirrus, few cumulus
distant ESE-SW-N, few altocumulus/altostratus distant SSW-WNW
Temperature: 75F; Dew Point: 56F; Relative Humidity: 51%
Wind: S @ 5 kts, wind light and variable
Sea-level pressure: 1020.8 mb; 30.14 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 76F
6-hr Min temp: 64F
6-hr Precip: 0.00 inches
BHO SA 1755 180 SCT E250 BKN 60 208/75/56/1705/014/
FEW CU DSNT ESE-SW-N FEW AC/ACC DSNT SSW-WNW WND L/V/ 8/286
58010 10076 20064

————————————————————–

SUMMARY FOR SUNDAY, AUGUST 30, 2026

TEMPERATURE (DEGREES F)
MAX…….85 NORMAL…..78
MIN…….60 NORMAL…..61
MEAN……73 NORMAL…..69

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+55 [+1.6 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 (AUG)………..1 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE SEASON…………….3 DEPARTURE…….-14
TOTAL HEATING UNITS LAST SEASON TO DATE……….19 DEPARTURE…….-16

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..8 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE MONTH (AUG)………253 DEPARTURE…….+49
TOTAL COOLING UNITS FOR THE SEASON…………..750 DEPARTURE……+159
TOTAL COOLING UNITS LAST SEASON TO DATE………672 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)………..30 W @ 12:20 P.M.*
VECTOR #1 (1-Sec)……….30 W @ 12:20 P.M.
VECTOR #2 (1-Sec)……….30 WSW @ 12:16 P.M.
DAVIS #1……………….28 W @ 12:15 P.M.
DAVIS #2 ………………29 W @ 12:16 P.M.
RMY #1 (Instantaneous)…..31 W @ 11:28 A.M.
RMY #2 (Instantaneous)…..31 WSW @ 12:09 P.M.
MERLIN…………………28 W
RICHARDS (C5C) (Inst)……29 W @ 11:28 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 W @ 11:31 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 W @ 11:30 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 W @ 11:29 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 W @ 11:30 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………21 W @ 11:30 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 W @ 11:30 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 W @ 11:29 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 W @ 11:30 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.9 WSW [262 total miles] VECTOR #1……………..10.9
VECTOR #2……………..11.5
DAVIS #1………………11.1 WSW
DAVIS #2………………11.4 WSW
RMY #1………………..10.8 WSW
RMY #2………………..11.2 WSW
RICHARDS (C5C)…………10.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.16 DEPARTURE…..+0.04
TOTAL PRECIPITATION FOR THE MONTH (AUG)……..1.89 DEPARTURE…..-1.91
TOTAL PRECIPITATION FOR THE YEAR (2026)…….25.99 DEPARTURE…..-8.51

————————————————————–

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