Tuesday, July 8, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 8, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0416E
SUNSET: 1923E
HOT AND HUMID CONDITIONS CONTINUE WITH INCREASING CLOUDS….
Mainly sunny skies this morning have become mainly cloudy with
only a few breaks by this afternoon. Regardless, it’s still
quite hot and humid out there having reached 90F degrees again
for the 10th time this summer already. We only had a total of 10
such days for all of 2024!
As mentioned, temperatures have reached the low to mid 90s early
this afternoon after an overnight temperature that only fell to
73F. With the dew point in the low to mid 70s, the heat index has
been pushing, and even exceeding 100F degrees today. Today should
be the last day of this level of heat for several days. Humidity
levels however will likely remain on the high side through the
rest of the week at least.
The wind has been lighter today for the most part, but did
increase a bit this afternoon over the levels this morning. A
mainly westerly wind has been averaging at around 9mph for the
day so far. Gusts have picked up a bit from time to time, with
two distinct periods of more frequent and stronger gusts occurring
back in the wee hours of this morning, and again this afternoon.
The peak gust so far for the day is 22mph, occurring just after
2:30pm this afternoon.
Visibility has improved a bit from around 20 miles early this
morning to around 50 miles by early this afternoon.
The maximum temperature so far today is 94F degrees, which is
13 degrees above the normal high of 81F. The minimum temperature
since midnight is 73F degrees, which is 10 degrees above the
normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Broken altocumulus/castellanus, broken cirrostratus,
few stratus fractus all quadrants
Temperature: 76F; Dew Point: 74F; Relative Humidity: 91%
Wind: WSW @ 6 kts, wind light
Sea-level pressure: 1014.4 mb; 29.96 in. Hg: rising, then more rapidly
Visibility: 20 miles, thin fog
6-hr Max temp: 76F
6-hr Min temp: 73F
24-hr Precip: 0.01 inches
BHO SA 1155 E150 BKN 200 BKN 20 144/76/74/2506/996/ FEW STFRA ALQDS
THN F ALQDS WND LGT/ 8/785 53006 10076 20073
10 A.M.
Weather: Broken cumulus, broken altostratus, broken cirrostratus,
broken cirrus
Temperature: 89F; Dew Point: 73F; Relative Humidity: 58%
Heat Index: 97F
Wind: WNW @ 7 kts
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: falling, then rising
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E30 BKN 150 BKN 220 BKN 250 BKN 40 147/89/73/3007/996/
HAZY HX97/ 8/255 53003
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrostratus,
moderate cumulus all quadrants
Temperature: 93F Dew Point: 72F; Relative Humidity: 51%;
Heat Index: 101F
Wind: WNW @ 9G18 kts
Sea-level pressure: 1014.4 mb; 29.96 in. Hg: rising, then falling
Visibility: 50 miles
6-hr Max temp: 94F
6-hr Min temp: 76F
6-hr Precip: 0.00 inches
BHO SA 1755 E40 BKN 80 BKN 220 BKN 50 144/93/72/3009G18/996/
MDT CU ALQDS HX 101/ 8/266 58003 10094 20076
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SUMMARY FOR MONDAY, JULY 7, 2025
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..81
MIN…….69 NORMAL…..63
MEAN……79 NORMAL…..72
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+7
TOTAL DEPARTURE FOR THE MONTH………………………+30 [+4.1 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……..-2
TOTAL HEATING UNITS FOR THE SEASON…………….0 DEPARTURE……..-2
TOTAL HEATING UNITS LAST SEASON TO DATE………..0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY…………….14 DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE MONTH…………….77 DEPARTURE…….+28
TOTAL COOLING UNITS FOR THE SEASON…………..277 DEPARTURE…….+89
TOTAL COOLING UNITS LAST SEASON TO DATE………240 DEPARTURE…….+37
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)……….E28 SSW @ 04:29 P.M.
VECTOR #1 (1-Sec)……….28 SSW @ 04:29 P.M.
VECTOR #2 (1-Sec)……….30 SSW @ 02:34 P.M.
DAVIS #1……………….30 S @ 05:07 P.M.
DAVIS #2 ………………35 S @ 05:51 P.M.
RMY #1 (Instantaneous)…..29 SSW @ 05:15 P.M.
RMY #2 (Instantaneous)…..30 SW @ 11:30 A.M.
MERLIN…………………26 SW
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 SSW @ 05:17 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 @ 04:43 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..21 @ 10:36 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………20 S @ 05:09 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………23 S @ 11:45 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 SSW @ 05:52 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 SSW @ 10:36 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.5 SW [324 total miles]
VECTOR #1………………13.5
VECTOR #2………………14.2
DAVIS #1……………….13.2 SSW
DAVIS #2……………….14.3 SW
RMY #1…………………13.2 SW
RMY #2…………………14.3 SSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH…………..0.20 DEPARTURE…..-0.57
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.43 DEPARTURE…..-4.57
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PRELIMINARY CLIMATE SUMMARY FOR JULY 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
7/1 90/68/79/+8/0.14/411/45 38 W VEC1 38 W RMY 41 TSTM
7/2 85/69/77/+6/0.02/247/27 23 WSW VEC1 24 WSW RMY 24
7/3 88/63/76/+4/0.03/…/.. 39 SW VEC1 39 SW RMY 40 TSTM
7/4 80/60/70/-2/0.00/…/.. 28 NNW VEC1 27 NNW RMY 29
7/5 83/61/72/0/0.00/…/.. 23 W VEC1 23 W RMY 24
7/6 92/65/79/+7/0.00/…/.. 29 SW VEC1 29 SW RMY 29
7/7 88/69/79/+7/0.01/…/.. 28 SSW VEC1 28 SSW RMY 29 TSTM
7/8 The low since midnight is 73F, the daily normal low is 63F.
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JULY 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 JULY 8
HIGH 95F IN 1981
LOW 50F IN 1919
PRECIP 1.74 INS IN 1916
PEAK GUST 46e SSW IN 1941
RECORDS FOR JULY 9
HIGH 98F IN 1912
LOW 47F IN 1909
PRECIP 3.74 INS IN 1921
WIND 46 MPH NW IN 1992
TODAY’S REPORT PREPARED BY: MFD
