Saturday, August 30, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, AUGUST 30, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0508E
SUNSET: 1821E
MIX OF SUN AND CLOUDS TODAY WITH DRY AIR AND COMFORTABLE
TEMPERATURES….
Today has been a pretty spectacular Saturday with plenty of
sunshine mixed with some mainly fair weather cumulus clouds.
The air has dried out nicely following the cold frontal
passage late last evening. A brief rain shower did occurred
during the mid to late afternoon yesterday leaving only 0.06″
of rain in the gauge.
August is likely to finish with well below normal rainfall as
we’ve only had roughly half what is normally expected for the
month. The monthly deficit as of today is -1.80″!
Temperatures today are quite pleasant, especially for late
August. Readings, which started the day in the low 50s, have
recovered nicely into the low to mid 70s by early this afternoon.
This is a bit below normal for this time of year. The dew point
has dropped from the low to mid 50s this morning to the upper
40s early this afternoon, indicating a very dry air mass for
this time of year. Definitely a great day to be outdoors today!
The wind has been fairly steady out of the northwest and west-
northwest, but generally on the light side. The average for the
day so far is around 9mph. The peak gust for the day so far is
21mph, which occurred just after noon time.
Visibility has been excellent today thanks to the nice dry air.
The view has been generally 70-80 miles all day!
The maximum temperature so far today is 74F degrees, which is
4 degrees below the normal high of 78F. The minimum temperature
since midnight is 52 degrees, which is 9 degrees below the normal
low of 61F.
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Today’s Observations:
7 A.M.
Weather: Scattered altocumulus/castellanus
Temperature: 57F; Dew Point: 53F; Relative Humidity: 86%
Wind: NW @ 7 kts
Sea-level pressure: 1015.9 mb; 30.00 in. Hg: rising unsteadily
Visibility: 80 miles
6-hr Max temp: 58F
6-hr Min temp: 52F
24-hr Precip: 0.06 inches
BHO SA 1155 70 SCT 80 159/57/53/3107/000/ 8/080 52016 70006 10058
20052
10 A.M.
Weather: Clear, few cumulus all quadrants, few cirrus distant NW-N
and distant ESE-SSW
Temperature: 68F; Dew Point: 52F; Relative Humidity: 55%
Wind: NW @ 6 kts, wind light
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 163/68/52/3206/001/ FEW CU ALQDS FEW CI DSNT NW-N
AND DSNT ESE-SSW WND LGT/ 8/201 50004
1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 73F Dew Point: 49F; Relative Humidity: 43%
Wind: W @ 6 kts, wind light and variable
Sea-level pressure: 1016.1 mb; 30.01 in. Hg: falling unsteadily
Visibility: 80 miles
6-hr Max temp: 73F
6-hr Min temp: 57F
6-hr Precip: 0.00 inches
BHO SA 1755 E45 BKN 250 BKN 80 161/73/49/2606/001/ FEW CB DSNT NE
WND L/V/ 8/301 57002 10073 20057
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SUMMARY FOR FRIDAY, AUGUST 29, 2025
TEMPERATURE (DEGREES F)
MAX…….73 NORMAL…..78
MIN…….59 NORMAL…..61
MEAN……66 NORMAL…..70
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4
TOTAL DEPARTURE FOR THE MONTH………………………-49 [-1.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….16 DEPARTURE……..+7
TOTAL HEATING UNITS FOR THE SEASON……………17 DEPARTURE………0
TOTAL HEATING UNITS LAST SEASON TO DATE……….11 DEPARTURE……..+6
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..1 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH……………162 DEPARTURE…….-37
TOTAL COOLING UNITS FOR THE SEASON…………..673 DEPARTURE…….+87
TOTAL COOLING UNITS LAST SEASON TO DATE………689 DEPARTURE…….-16
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)………..29 SSE @ 10:04 A.M.
VECTOR #1 (1-Sec)……….29 SSE @ 10:04 A.M.
VECTOR #2 (1-Sec)……….29 SSE @ 10:02 A.M.
DAVIS #1……………….28 S @ 09:22 A.M.
DAVIS #2 ………………35 S @ 09:06 A.M.
RMY #1 (Instantaneous)…..29 S @ 09:05 A.M.
RMY #2 (Instantaneous)…..29 SSE @ 10:04 A.M.
MERLIN…………………25 S
RICHARDS (C5C) (Inst)……27 @ 09:05 A.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SSE @ 10:06 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 10:05 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 @ 10:04 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 SSE @ 10:05 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………24 S @ 09:09 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SSE @ 10:07 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..22 SSE @ 10:04 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 @ 10:07 A.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.5 S [251 total miles]
VECTOR #1………………10.7
VECTOR #2………………11.5
DAVIS #1……………….10.3 S
DAVIS #2……………….11.8 S
RMY #1…………………10.4 SSW
RMY #2…………………11.6 S
RICHARDS (C5C)………….10.6
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.06 DEPARTURE…..-0.06
TOTAL PRECIPITATION FOR THE MONTH…………..1.88 DEPARTURE…..-1.80
TOTAL PRECIPITATION FOR THE YEAR (2025)…….31.33 DEPARTURE…..-3.05
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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/303/37 36 ENE VEC1 35 NE RMY 36
8/22 79/53/66/-5/0.00/774/95 24 N VEC1 25 N RMY 25
8/23 85/60/73/+2/0.00/771/95 33 SSW VEC1 33 SSW RMY 35
8/24 80/60/70/-1/0.00/632/78 33 SSW VEC1 35 SSW RMY 34
8/25 83/63/73/+3/T/533/66 23 WSW VEC1 22 SW RMY 23
8/26 77/59/68/-2/0.00/765/95 28 WNW VEC1 27 WNW RMY 28
8/27 75/57/66/-4/T/634/79 26 WNW VEC1 26 NW RMY 27
8/28 77/52/65/-5/T/…/.. 31 SSW VEC1 31 SSW RMY 31
8/29 73/59/66/-4/0.06/…/.. 29 SSE VEC1 29 SSE RMY 29
8/30 The low since midnight is 52F, the daily normal low is 61F.
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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 30
HIGH 94F IN 1953
LOW 39F IN 1965
PRECIP 2.75 INCHES IN 1936
PEAK GUST 43 MPH NW IN 1965
RECORDS FOR AUGUST 31
HIGH 94F IN 1953
LOW 42F IN 1976
PRECIP 2.46 INCHES IN 1954
PEAK GUST 125 MPH SE IN 1954 [CAROL – RECORD FOR MONTH]
TODAY’S REPORT PREPARED BY: MFD
