Thursday, August 14, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, AUGUST 14, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0451E
SUNSET: 1846E
PARTIAL SUNSHINE TODAY, BUT HOT AND HUMID….
Clouds have been dominating the sky today with some breaks
of sunshine getting through. There has been enough sun to
allow the temperature to warm quite a bit, although it
started with a relatively high base as readings never dropped
below the 70s overnight.
Temperatures have reached the upper 80s to near 90 by early
this afternoon. Dew point values have been holding in the low
70s, as such heat index values have still been able to push
into the mid 90s.
The wind has been rather light out of mainly a southwesterly
direction. The average speed for the day so far is only around
6mph. The peak gust so far for the day is 15mph, which occurred
just after 2:30am this morning.
Visibility has been limited today, first by thin fog early this
morning, then by haziness for the balance of the day. The view
has been around 35-40 miles all day.
The maximum temperature so far today is 89F degrees, which is
8 degrees above the normal high of 81F. The minimum temperature
since midnight is 71F degrees, which is 8 degrees above the
normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus castellanus, broken altocumulus,
broken cirrus, stratus layer distant ESE-S-SW
Temperature: 74F; Dew Point: 71F; Relative Humidity: 91%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1012.9 mb; 29.91 in. Hg: rising unsteadily
Visibility: 35 miles, thin fog
6-hr Max temp: 74F
6-hr Min temp: 71F
24-hr Precip: 0.00 inches
BHO SA 1155 E75 BKN 140 BKN 250 BKN 35 129/74/71/2606/991/
ST LYR DSNT ESE-S-SW THN F ALQDS WND LGT/ 8/681 52014 10074 20071
10 A.M.
Weather: Scattered cumulus, scattered altocumulus/castellanus,
broken cirrus
Temperature: 84F; Dew Point: 71F Relative Humidity: 66%
Wind: SW @ 3 kts, wind light and variable
Sea-level pressure: 1013.5 mb; 29.93 in. Hg: rising, then more slowly
Visibility: 35 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 35 SCT 120 SCT E250 BKN 35 135/84/71/2303/993/
MDT CU SE-WSW HAZY WND L/V/ 8/284 51006
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus,
towering cumulus all quadrants
Temperature: 88F Dew Point: 70F; Relative Humidity: 55%
Wind: WNW @ 5 kts, wind light
Sea-level pressure: 1013.1 mb; 29.92 in. Hg: steady, then falling
Visibility: 40 miles, hazy
6-hr Max temp: 89F
6-hr Min temp: 74F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 85 BKN 250 BKN 40 131/88/70/3005/992/
TCU ALQDS HAZY WND LGT/ 8/251 58004 10089 20074
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SUMMARY FOR WEDNESDAY, AUGUST 13, 2025
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..81
MIN…….66 NORMAL…..63
MEAN……77 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+5
TOTAL DEPARTURE FOR THE MONTH……………………….-4 [-0.5 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……..-3
TOTAL HEATING UNITS FOR THE SEASON…………….1 DEPARTURE……..-9
TOTAL HEATING UNITS LAST SEASON TO DATE………..2 DEPARTURE……..-1
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY…………….12 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………….96 DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE SEASON…………..607 DEPARTURE……+121
TOTAL COOLING UNITS LAST SEASON TO DATE………613 DEPARTURE……..-6
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)………..25 SW @ 06:07 P.M.
VECTOR #1 (1-Sec)……….25 SW @ 06:07 P.M.
VECTOR #2 (1-Sec)……….25 SW @ 06:07 P.M.
DAVIS #1……………….24 S @ 01:14 P.M.
DAVIS #2 ………………26 S @ 01:08 P.M.
RMY #1 (Instantaneous)…..25 SW @ 06:07 P.M.
RMY #2 (Instantaneous)…..26 SW @ 06:07 P.M.
MERLIN…………………22 SW
RICHARDS (C5C) (Inst)……23 @ 06:11 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 SW @ 06:11 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 @ 06:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 @ 06:08 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 SW @ 06:08 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 SW @ 06:08 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SW @ 06:08 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SW @ 06:08 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 @ 06:08 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.2 SSW [221 total miles]
VECTOR #1……………….9.7
VECTOR #2………………10.0
DAVIS #1………………..9.2 SSW
DAVIS #2………………..9.9 SSW
RMY #1………………….9.5 SSW
RMY #2…………………10.2 SSW
RICHARDS (C5C)…………..9.1
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH…………..0.44 DEPARTURE…..-1.26
TOTAL PRECIPITATION FOR THE YEAR (2025)…….29.89 DEPARTURE…..-2.51
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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 The low since midnight is 71F, the daily normal low is 63F.
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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 14
HIGH 99F IN 2002
LOW 46F IN 1964
PRECIP 3.06 INCHES IN 1919
PEAK GUST 61 MPH WNW IN 1963
RECORDS FOR AUGUST 15
HIGH 95F IN 1928
LOW 47F IN 1964
PRECIP 1.89 INCHES IN 2011
PEAK GUST 44e MPH S IN 1941, 44 MPH N IN 2024
TODAY’S REPORT PREPARED BY: MFD/Amanda Joly
