Thursday, August 7, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, AUGUST 7, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0443E
SUNSET: 1856E
CLOUDS THIS MORNING DISSIPATED LEAVING US WITH PLENTY OF SUNSHINE….
Clouds lingered into the late morning hours, then dissipated
giving us plenty of sun early this afternoon. The wildfire smoke
has finally departed the area as well, so it’s nice to see a deep
blue sky again.
Temperatures have warmed back toward normal levels with readings
reaching the low 80s. Dew point values, which were around 60F
early this morning, have dropped nicely to around 50 by early this
afternoon. This is making it feel quite comfortable and refreshing
out there despite the warmer temperature.
The wind has been rather light and variable, but with a pendant
to being mostly onshore. The average speed for the day so far is
only around 5mph. The peak gust so far for the day is 14mph, which
occurred at 1:30pm this afternoon.
Visibility is much better today than it has been and improving
as the day progresses. It started the day around 20 miles early
this morning, but has bumped up to 40 miles early this afternoon.
The maximum temperature so far today is 80F degrees, which is
2 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: Broken altocumulus
Temperature: 67F; Dew Point: 60F; Relative Humidity: 79%
Wind: NNE @ 4 kts, wind light
Sea-level pressure: 1030.5 mb; 30.43 in. Hg: steady, then rising
Visibility: 20 miles, 30 miles SE-WSW, 10 miles N-E, thin fog
6-hr Max temp: 67F
6-hr Min temp: 61F
24-hr Precip: 0.00 inches
BHO SA 1155 E150 BKN 20 305/67/60/0304/043/ THN F ALQDS BLW INVSN
VSBY 30 SE-WSW 10 N-E WND LGT/ 8/050 53005 10067 20061
10 A.M.
Weather: Broken altocumulus
Temperature: 75F; Dew Point: 55F Relative Humidity: 50%
Wind: E @ 3 kts, wind light and variable
Sea-level pressure: 1030.3 mb; 30.42 in. Hg: rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E150 BKN 30 303/75/55/1003/042/ HAZY WND L/V/ 8/050 58002
1 P.M.
Weather: Clear, few cumulus distant SW-NW-N, few cirrus all quadrants
Temperature: 79F Dew Point: 50F; Relative Humidity: 36%
Wind: ESE @ 5 kts, wind light
Sea-level pressure: 1032.0 mb; 30.39 in. Hg: falling, then more rapidly
Visibility: 40 miles
6-hr Max temp: 80F
6-hr Min temp: 67F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 40 291/79/50/1205/039/ FEW CU DSNT SW-NW-N
FEW CI ALQDS K PLUME SSE WND LGT/ 8/202 58012 10080 20067
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SUMMARY FOR WEDNESDAY, AUGUST 6, 2025
TEMPERATURE (DEGREES F)
MAX…….77 NORMAL…..82
MIN…….61 NORMAL…..64
MEAN……69 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4
TOTAL DEPARTURE FOR THE MONTH………………………-28 [-4.9 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……………..4 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………….22 DEPARTURE…….-25
TOTAL COOLING UNITS FOR THE SEASON…………..533 DEPARTURE…….+99
TOTAL COOLING UNITS LAST SEASON TO DATE………580 DEPARTURE…….-47
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)………..17 ENE @ 11:54 A.M.
VECTOR #1 (1-Sec)……….17 ENE @ 11:54 A.M.
VECTOR #2 (1-Sec)……….17 ENE @ 11:55 A.M.
DAVIS #1……………….17 ENE @ 11:54 A.M.
DAVIS #2 ………………17 ENE @ 11:55 A.M.
RMY #1 (Instantaneous)…..16 ENE @ 11:51 A.M.
RMY #2 (Instantaneous)…..18 ENE @ 11:55 A.M.
MERLIN…………………16 E
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………12 NNE @ 05:48 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..12 @ 05:44 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 05:47 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 ENE @ 12:02 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………13 ENE @ 12:02 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..12 NNE @ 05:44 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 N @ 05:47 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.0 ENE [143 total miles]
VECTOR #1……………….6.5
VECTOR #2……………….7.1
DAVIS #1………………..6.7 ENE
DAVIS #2………………..6.7 ENE
RMY #1………………….6.6 ENE
RMY #2………………….7.0 ENE
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…..-0.36
TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-1.61
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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/-9/0.44/546/63 28 NE VEC1 28 NE RMY 27
8/2 75/54/65/-8/0.00/838/97 18 NNW VEC1 18 NNW RMY 18
8/3 83/59/71/-2/0.00/784/91 21 SSW VEC1 21 SSW RMY 21
8/4 84/61/73/0/0.00/757/88 17 W VEC1 17 W RMY 17
8/5 73/62/68/-5/0.00/480/56 28 NE VEC1 27 NE RMY 28
8/6 77/61/69/-4/0.00/248/29 17 ENE VEC1 17 ENE RMY 16
8/7 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 7
HIGH 96F IN 2022
LOW 51F IN 2004
PRECIP 3.32 INCHES IN 1926
PEAK GUST 51 MPH NE 1975
RECORDS FOR AUGUST 8
HIGH 97F IN 2022
LOW 47F IN 1903
PRECIP 3.08 INCHES IN 1976
PEAK GUST 45 MPH WNW IN 1958
TODAY’S REPORT PREPARED BY: MFD
