Wednesday, August 6, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, AUGUST 6, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0442E
SUNSET: 1857E
MAINLY CLOUDY SKIES WITH SOME WILDFIRE SMOKE ALOFT TODAY….
While there is some wildfire smoke aloft still, near the surface
the air is considerably clearer than it was the last couple of
days. Cirrus clouds continue to pass across the sky as well so
it’s been a mainly cloudy day with only dim sunshine filtering
through.
Temperatures are still below normal today with readings reaching
the mid to upper 70s early this afternoon. Dew point values had
been generally hanging out in the mid to upper 50s, but has
pushed to 60F as of the 1pm observation. Either way, it is still
comfortable for this time of year.
The wind has been onshore again today, but has been lighter
than yesterday. The average speed for the day so far is around
7mph. The peak gust so far for the day is 17mph, which occurred
just before noon time.
Visibility is much better today than it has been, but is still
somewhat limited due to haziness. The view has been generally
30-35 miles all day.
The maximum temperature so far today is 77F degrees, which is
5 degrees below the normal high of 82F. The minimum temperature
since midnight is 61F degrees, which is 3 degrees below the
normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Overcast cirrus
Temperature: 65F; Dew Point: 57F; Relative Humidity: 75%
Wind: NNE @ 8 kts
Sea-level pressure: 1031.6 mb; 30.46 in. Hg: rising, then more slowly
Visibility: 35 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 61F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 OVC 35 316/65/57/0308/046/ SUN DMLY VSBL HAZY/
8/002 51012 10065 20061
10 A.M.
Weather: Broken cirrus, smoke layer aloft all quadrants
Temperature: 72F; Dew Point: 57F Relative Humidity: 59%
Wind: ENE @ 5 kts, wind light
Sea-level pressure: 1032.3 mb; 30.48 in. Hg: rising, then more slowly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E250 BKN 30 323/72/57/0705/048/ SUN DMLY VSBL
K LYR ALF ALQDS HAZY WND LGT/ 8/001 51007
1 P.M.
Weather: Overcast cirrus, few small cumulus distant WNW-NW,
smoke layer aloft all quadrants
Temperature: 74F Dew Point: 60F; Relative Humidity: 61%
Wind: ENE @ 6 kts, wind light
Sea-level pressure: 1032.0 mb; 30.47 in. Hg: rising, then falling
Visibility: 35 miles, hazy
6-hr Max temp: 77F
6-hr Min temp: 65F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 OVC 35 320/74/60/0706/047/ FEW SML CU DSNT WNW-NW
SUN DMLY VSBL K LYR ALF ALQDS HAZY WND LGT/ 8/102 58003 10077 20065
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SUMMARY FOR TUESDAY, AUGUST 5, 2025
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..82
MIN…….62 NORMAL…..64
MEAN……68 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………-24 [-5.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………..0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………….1 DEPARTURE……..-7
TOTAL HEATING UNITS LAST SEASON TO DATE………..0 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..3 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH…………….18 DEPARTURE…….-22
TOTAL COOLING UNITS FOR THE SEASON…………..529 DEPARTURE……+103
TOTAL COOLING UNITS LAST SEASON TO DATE………578 DEPARTURE…….-49
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
F420C (Official)………..28 NE @ 10:06 A.M.
VECTOR #1 (1-Sec)……….27 NE @ 10:06 A.M.
VECTOR #2 (1-Sec)……….26 NE @ 10:05 A.M.
DAVIS #1……………….26 NE @ 10:06 A.M.
DAVIS #2 ………………24 ENE @ 09:31 A.M.
RMY #1 (Instantaneous)…..28 NE @ 10:06 A.M.
RMY #2 (Instantaneous)…..27 NE @ 10:05 A.M.
MERLIN…………………24 NE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 NE @ 10:06 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 10:07 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 10:07 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 ENE @ 10:07 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 ENE @ 10:07 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 NE @ 10:07 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 NE @ 10:07 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.2 ENE [221 total miles]
VECTOR #1……………….9.1
VECTOR #2……………….9.9
DAVIS #1………………..9.8 ENE
DAVIS #2………………..9.8 ENE
RMY #1………………….9.2 ENE
RMY #2………………….9.8 NE
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..-0.22
TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-1.47
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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 71/57/64/-9/0.44/…/.. 28 NE VEC1 28 NE RMY 27
8/2 75/54/65/-8/0.00/…/.. 18 NNW VEC1 18 NNW RMY 18
8/3 83/59/71/-2/0.00/…/.. 21 SSW VEC1 21 SSW RMY 21
8/4 84/61/73/0/0.00/…/.. 17 W VEC1 17 W RMY 17
8/5 73/62/68/-5/0.00/…/.. 28 NE VEC1 27 NE RMY 28
8/6 The low since midnight is 61F, the daily normal low is 64F.
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AUGUST 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 AUGUST 6
HIGH 95F IN 1931, 2022
LOW 48F IN 1934
PRECIP 1.47 INCHES IN 1995
PEAK GUST 44e MPH SSW IN 1940
RECORDS FOR AUGUST 7
HIGH 96F IN 2022
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
TODAY’S REPORT PREPARED BY: MFD
