Thursday, July 3, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
THURSDAY, JULY 3, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0412E
SUNSET: 1924E
HAZY, HOT, AND HUMID TODAY UNDER MAINLY SUNNY SKIES….
Sunshine has been the theme so far for the day, but trouble does
lurk for later in the day. A cold front approaching the area looks
to bring thunderstorms later this afternoon and evening, some of
which could be on the severe side. But for now it’s a great beach
day for those fortunate enough to be able to enjoy those related
activities.
Temperatures have warmed into the upper 80s The dew point, while
still on the humid side, isn’t as oppressive as it was yesterday.
Values have been generally in the mid 60s, as opposed to the low
70s yesterday.
On an interesting note, so far this summer we’ve recorded 8 ninety
degree days (7 in June). For all of 2024 we only had a total of 10
ninety degree days (3 in June, 3 in July, and 4 in August). Also
the highest temperature for last year was 94F, which occurred twice,
on June 20th and August 2nd. Based on the forecast for the next 7
days, we look to exceed last year’s total by early next week. Stay
tuned!
The wind was on the light side through most of the morning, but has
increased a bit into early this afternoon out of mainly the west-
southwest. The average speed for the day so far is around 8mph. The
peak gust so far is 26mph, which occurred just after 1pm this
afternoon.
Visibility has been between 20-30 miles for the most part today,
due to haziness.
The maximum temperature for today is 88F degrees, which is 7 degrees
above the normal high of 81F. The minimum temperature since midnight
is 67F degrees, which is 6 degrees above the normal low of 63F.
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Today’s Observations:
7 A.M.
Weather: Clear, few altocumulus/castellanus distant NW-NE-ESE
Temperature: 73F; Dew Point: 67F; Relative Humidity: 83%
Wind: W @ 4 kts, wind light
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: rising, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 73F
6-hr Min temp: 67F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 30 106/73/67/2704/984/ FEW AC/ACC DSNT NW-NE-ESE
HAZY WND LGT/ 8/080 53007 10073 20067
10 A.M.
Weather: Thin scattered cirrus, few cumulus S-SW and distant NW-N
Temperature: 84F; Dew Point: 65F; Relative Humidity: 53%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1009.5 mb; 29.81 in. Hg: falling, then more slowly
Visibility: 20 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 250 -SCT 20 095/84/65/2304/981/ FEW CU S-SW AND
DSNT NW-N HAZY WND LGT/ 8/201 56011
1 P.M.
Weather: Scattered cumulus, scattered altocumulus,
thin scattered cirrus
Temperature: 85F Dew Point: 63F; Relative Humidity: 47%
Wind: WNW @ 12G19 kts
Sea-level pressure: 1008.9 mb; 29.79 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 88F
6-hr Min temp: 73F
6-hr Precip: 0.00 inches
BHO SA 1755 50 SCT 70 SCT 250 -SCT 30 089/85/63/3012G19/979/
HAZY/ 8/261 58006 10088 20073
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SUMMARY FOR WEDNESDAY, JULY 2, 2025
TEMPERATURE (DEGREES F)
MAX…….85 NORMAL…..80
MIN…….69 NORMAL…..62
MEAN……77 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+6
TOTAL DEPARTURE FOR THE MONTH………………………+14 [+6.8 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……..-1
TOTAL HEATING UNITS FOR THE SEASON…………….0 DEPARTURE……..-1
TOTAL HEATING UNITS LAST SEASON TO DATE………..0 DEPARTURE………0
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY…………….12 DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH…………….26 DEPARTURE…….+13
TOTAL COOLING UNITS FOR THE SEASON…………..226 DEPARTURE…….+74
TOTAL COOLING UNITS LAST SEASON TO DATE………188 DEPARTURE…….+38
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)……….E23 WSW @ 03:40 P.M.
VECTOR #1 (1-Sec)……….24 WSW @ 03:40 P.M.
VECTOR #2 (1-Sec)……….23 WSW @ 02:41 P.M.
DAVIS #1……………….22 WSW @ 03:40 P.M.
DAVIS #2 ………………22 W @ 03:32 P.M.
RMY #1 (Instantaneous)…..24 WSW @ 03:40 P.M.
RMY #2 (Instantaneous)…..24 WSW @ 02:40 P.M.
MERLIN…………………22 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 W @ 03:48 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 @ 03:50 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 02:42 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 W @ 03:50 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WSW @ 02:42 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 WSW @ 03:33 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 WSW @ 02:42 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.0 WSW [216 total miles]
VECTOR #1……………….9.3
VECTOR #2……………….9.4
DAVIS #1………………..9.2 WSW
DAVIS #2………………..9.4 WSW
RMY #1………………….9.1 WSW
RMY #2………………….9.4 WSW
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..0.16 DEPARTURE…..-0.07
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.39 DEPARTURE…..-4.07
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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 The low since midnight is 67F, 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 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.98 IN 2021
PEAK GUST 52 MPH NW IN 1963
RECORDS FOR JULY 4
HIGH 99F IN 1911
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949
TODAY’S REPORT PREPARED BY: MFD
