Sunday, August 3, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, AUGUST 3, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0439E
SUNSET: 1901E
CLEAR SKIES, BUT WILDFIRE SMOKE RETURNS WITH HAZY CONDITIONS….
Today is another delightful day with comfortable temperatures
and humidity levels. Skies are perfectly clear in terms of not
a cloud in the sky, however wildfire smoke from Canada has
once again found it’s way to the region creating a milky sky
along with hazy conditions.
Temperatures have inched slightly above normal today with
readings reaching the low 80s early this afternoon. Dew point
values are still in the comfortable range with readings
holding in the mid 50s most of the day so far.
The wind has been on the light and variable side today. The
average speed has only been around 7 mph for the day so far.
Our peak gust is 18mph, which occurred around 3:30am this
morning.
Visibility has been quite limited today thanks to haziness
from the increasing amounts of smoke. The view has been
decreasing as the day progresses, from around 30 miles early
this morning to only 15 miles by early this afternoon.
The maximum temperature so far today is 82F degrees, which is
equal to the normal high of 82F. The minimum temperature since
midnight is 59F degrees, which is 5 degrees below the normal
low of 64F.
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Today’s Observations:
7 A.M.
Weather: Clear
Temperature: 65F; Dew Point: 55F; Relative Humidity: 70%
Wind: NNW @ 6 kts, wind light
Sea-level pressure: 1022.7 mb; 30.20 in. Hg: rising, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 59F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 30 227/65/55/3306/020/ K LYR ALQDS HAZY WND LGT/
8/000 50003 10065 20059
10 A.M.
Weather: Clear
Temperature: 77F; Dew Point: 56F; Relative Humidity: 49%
Wind: NW @ 3 kts, wind light
Sea-level pressure: 1023.0 mb; 30.21 in. Hg: steady, then rising
Visibility: 20 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 20 230/77/56/3203/021/ K LYR ALQDS HAZY WND LGT/
8/000 53003
1 P.M.
Weather: Clear
Temperature: 80F Dew Point: 56F; Relative Humidity: 43%
Wind: WSW @ 2 kts, wind light and variable
Sea-level pressure: 1021.5 mb; 30.16 in. Hg: falling, then more rapidly
Visibility: 15 miles, hazy
6-hr Max temp: 82F
6-hr Min temp: 65F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 15 215/80/56/2402/016/ K LYR ALQDS HAZY WND L/V/
8/000 58015 10082 20065
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SUMMARY FOR SATURDAY, AUGUST 2, 2025
TEMPERATURE (DEGREES F)
MAX…….75 NORMAL…..82
MIN…….54 NORMAL…..64
MEAN……65 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-8
TOTAL DEPARTURE FOR THE MONTH………………………-17 [-8.7 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………0
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……………..0 DEPARTURE……..-8
TOTAL COOLING UNITS FOR THE MONTH……………..1 DEPARTURE…….-15
TOTAL COOLING UNITS FOR THE SEASON…………..512 DEPARTURE……+109
TOTAL COOLING UNITS LAST SEASON TO DATE………533 DEPARTURE…….-21
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)……….E18 NNW @ 05:14 A.M.
VECTOR #1 (1-Sec)……….18 NNW @ 05:14 A.M.
VECTOR #2 (1-Sec)……….19 NW @ 02:11 A.M.
DAVIS #1……………….18 WNW @ 02:11 A.M.
DAVIS #2 ………………19 S @ 08:40 P.M.
RMY #1 (Instantaneous)…..18 NNW @ 05:56 A.M.
RMY #2 (Instantaneous)…..18 NW @ 02:11 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 NNW @ 05:58 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 06:00 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 @ 06:00 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 NNW @ 06:00 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S @ 08:41 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 NNW @ 06:00 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 NNW @ 05:59 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.1 NNW [195 total miles]
VECTOR #1……………….8.4
VECTOR #2……………….8.9
DAVIS #1………………..8.5 N
DAVIS #2………………..8.8 NNE
RMY #1………………….8.4 NNE
RMY #2………………….8.9 N
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..+0.18
TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-1.07
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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 The low since midnight is 59F, 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 3
HIGH 96F IN 1930
LOW 50F IN 1976
PRECIP 1.45 INCHES IN 1979
PEAK GUST 52 MPH NW IN 2008 [TSTM]
RECORDS FOR AUGUST 4
HIGH 96F IN 2022
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 67 MPH SSE IN 2020 [POST-TROPICAL STORM ISAIAS]
TODAY’S REPORT PREPARED BY: MFD
