Saturday, August 23, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, AUGUST 23, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0500E
SUNSET: 1832E
PLENTY OF SUNSHINE WITH WARM TEMPERATURES AND DECENT HUMIDITY
LEVELS TODAY….
Plenty of sunshine is the theme today with only a few high thin
cirrus clouds streaming in from the west and northwest. Some
puffy cumulus clouds have also popped up early this afternoon
adding some decoration and contrast to the sky.
Temperatures have warmed into the mid 80s by early this afternoon,
which is a bit above normal for late August. Dew point levels
have been holding around 60F. This is a bit more humid than
yesterday, but it still doesn’t feel too bad out there, especially
for this time of year.
The wind was a bit busy overnight, then relaxed a bit during the
morning hours. It has picked up once again as the atmosphere is
mixing with day time heating early this afternoon. It has been
generally blowing out of the southwest and south-southwest,
averaging at around 10mph for the day so far. The peak gust so
far is 22mph, which occurred around 12:25am this morning, and
again around 12:05pm.
Visibility started the day around 40 miles, but improved to
around 60 miles by late morning. So we have a pretty decent view
out there today!
The maximum temperature so far today is 85F degrees, which is
6 degrees above the normal high of 79F. The minimum temperature
since midnight is 60F degrees, which is 2 degrees below the
normal low of 62F.
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Today’s Observations:
7 A.M.
Weather: Clear
Temperature: 66F; Dew Point: 58F; Relative Humidity: 77%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1019.4 mb; 30.10 in. Hg: rising, then more slowly
Visibility: 40 miles, hazy
6-hr Max temp: 66F
6-hr Min temp: 60F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 40 194/66/58/2106/010/ HAZY WND LGT/ 8/000
51009 10066 20060
10 A.M.
Weather: Clear, few cumulus distant W-NW, few cirrus distant W-N
Temperature: 78F; Dew Point: 61F Relative Humidity: 56%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1019.5 mb; 30.11 in. Hg: falling, then rising
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 60 195/78/61/2206/011/ FEW CU DSNT W-NW
FEW CI DSNT W-N WND LGT/ 8/201 53001
1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 83F Dew Point: 60F; Relative Humidity: 45%
Wind: SW @ 9G17 kts
Sea-level pressure: 1018.4 mb; 30.07 in. Hg: falling, then more slowly
Visibility: 60 miles
6-hr Max temp: 85F
6-hr Min temp: 66F
6-hr Precip: 0.00 inches
BHO SA 1755 E60 BKN 250 BKN 60 184/83/60/2209G17/007/ 8/201 56011
10085 20066
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SUMMARY FOR FRIDAY, AUGUST 22, 2025
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..80
MIN…….53 NORMAL…..62
MEAN……66 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………-38 [-1.9 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…………….16 DEPARTURE…….+10
TOTAL HEATING UNITS FOR THE SEASON……………17 DEPARTURE……..+4
TOTAL HEATING UNITS LAST SEASON TO DATE……….10 DEPARTURE……..+7
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..1 DEPARTURE……..-5
TOTAL COOLING UNITS FOR THE MONTH……………136 DEPARTURE…….-24
TOTAL COOLING UNITS FOR THE SEASON…………..647 DEPARTURE……+101
TOTAL COOLING UNITS LAST SEASON TO DATE………643 DEPARTURE……..+4
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)………..24 N @ 04:21 A.M.
VECTOR #1 (1-Sec)……….25 N @ 02:56 A.M.
VECTOR #2 (1-Sec)……….25 SSW @ 09:57 P.M.
DAVIS #1……………….26 S @ 11:52 P.M.
DAVIS #2 ………………25 S @ 08:54 P.M.
RMY #1 (Instantaneous)…..25 N @ 03:59 A.M.
RMY #2 (Instantaneous)…..25 SSW @ 09:57 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……24 @ 04:21 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 SSW @ 11:57 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 04:21 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 @ 10:16 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 N @ 04:21 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S @ 07:33 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SSW @ 10:15 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SSW @ 10:16 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 04:21 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.7 N [257 total miles]
VECTOR #1………………10.9
VECTOR #2………………11.2
DAVIS #1……………….10.9 NE
DAVIS #2……………….11.0 ENE
RMY #1…………………10.6 NE
RMY #2…………………11.2 NE
RICHARDS (C5C)………….11.0
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.82 DEPARTURE…..-1.02
TOTAL PRECIPITATION FOR THE YEAR (2025)…….31.27 DEPARTURE…..-2.27
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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 81/61/71/-2/0.00/665/78 18 ESE VEC1 18 ESE RMY 17
8/8 83/61/72/0/0.00/834/98 21 SSW VEC1 21 SSW RMY 21
8/9 83/60/72/0/0.00/814/96 22 S VEC1 22 SSW RMY 22
8/10 89/61/75/+3/0.00/761/90 22 S VEC1 22 S RMY 21
8/11 94/67/81/+9/0.00/792/94 20 W VEC1 19 W RMY 19
8/12 93/68/81/+9/0.00/806/96 21 SSW VEC1 21 SSW RMY 21
8/13 88/66/77/+5/0.00/344/41 25 SW VEC1 25 SW RMY 25
8/14 90/68/79/+7/0.68/426/51 35 NE VEC1 34 NE RMY 36 TSTM
8/15 75/63/69/-3/0.00/783/96 29 NE VEC1 29 ENE RMY 31
8/16 86/62/74/+2/0.00/730/88 23 S VEC1 24 S RMY 23
8/17 89/64/77/+5/0.19/414/50 41 NE VEC1 43 NE RMY 42 TSTM
8/18 68/55/62/-9/0.00/627/76 32 NE VEC1 34 NE RMY 34
8/19 73/54/64/-7/0.00/560/68 20 SE VEC1 19 SE RMY 18
8/20 63/51/57-14/0.51/008/01 22 ENE VEC1 22 ENE RMY 21
8/21 67/54/61/-10/T/…/.. 36 ENE VEC1 35 NE RMY 36
8/22 79/53/66/-5/0.00/…/.. 24 N VEC1 25 N RMY 25
8/23 The low since midnight is 60F, the daily normal low is 62F.
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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 23
HIGH 89F IN 2020
LOW 45F IN 1923
PRECIP 2.21 INCHES IN 2020
PEAK GUST 60e MPH NW IN 1940, 60 WNW IN 2020* [*TSTM]
RECORDS FOR AUGUST 24
HIGH 92F IN 1947
LOW 43F IN 1971
PRECIP 2.40 INCHES IN 2010
PEAK GUST 54 MPH W IN 1986
TODAY’S REPORT PREPARED BY: MFD
