Wednesday, June 25, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
WEDNESDAY, JUNE 25, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0409E
SUNSET: 1925E
THE 4TH AND FINAL DAY OUR FIRST OFFICIAL HEAT-WAVE OF 2025 BRINGS
WITH IT MORE RECORD TEMPERATURES….
We started the day with clear skies and plenty of sunshine which
led to yet another record warm day here at Blue Hill. The difference
today however is that the upper atmosphere is cooling, thus allowing
for the development of numerous cumulus clouds into this afternoon,
and even a few tropical-like showers have developed this afternoon
off to the south and west after the 1pm observation.
Another difference is that a sea-breeze front, or perhaps even a
back-door cold front pushed through around noon-time shifting the
wind from the northwest to the east allowing for much needed
temperature relief this afternoon.
Before the sea-breeze boundary made it through however, the
temperatures reached 93F degrees, which tied the record high for
the day with 1943, 1980, and 2005. It was still 90F at the 1pm
observation, but it quickly dropped thereafter into the mid 80s.
The dew point was holding in the low to mid 70s into early this
afternoon, but these values have finally started to drop off a
bit as well following the 1pm observation. Heat Index values did
for a time this morning exceed 100F however.
As mentioned, the wind shifted from northwest to east right around
noon-time. The average speed for the day so far has been around
9mph. The peak gust so far for the day is 20mph, which occurred
just before 8:15am this morning.
The visibility continues to be somewhat limited by haze. The view
has been between 30-40 miles all day.
The maximum temperature for today is 93F degrees, which is 14
degrees above the normal high of 79F. The minimum temperature since
midnight is 76F degrees, which is 15 degrees above the normal low
of 61F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrus all quadrants
Temperature: 84F; Dew Point: 73F; Relative Humidity: 70%
Wind: NW @ 9 kts
Sea-level pressure: 1016.4 mb; 30.01 in. Hg: rising, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 76F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 30 164/84/73/3109/001/ FEW CI ALQDS HAZY/ 8/001 51005
10084 20076
10 A.M.
Weather: Scattered cumulus, scattered altocumulus, thin scattered cirrus
Temperature: 91F; Dew Point: 73F; Relative Humidity: 56%; Heat Index: 100F
Wind: NW @ 8kts
Sea-level pressure: 1016.7 mb; 30.02 in. Hg: steady, then rising
Visibility: 40 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 45 SCT 100 SCT 250 -SCT 40 167/91/73/3208/002/ HAZY
WND LGT HX 100/ 8/251 53003
1 P.M.
Weather: Broken cumulus, broken altocumulus, few moderate cumulus SSE
Temperature: 90F Dew Point: 73F; Relative Humidity: 56%; Heat Index: 98F
Wind: E @ 7 kts
Sea-level pressure: 1016.2 mb; 30.01 in. Hg: rising, then falling
Visibility: 40 miles, hazy
6-hr Max temp: 93F
6-hr Min temp: 84F
6-hr Precip: 0.00 inches
BHO SA 1755 E55 BKN 85 BKN 40 162/90/73/0907/001/ FEW MDT CU SSE
HAZY WSHFT 56 HX 98/ 8/260 58005 10093 20084
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SUMMARY FOR TUESDAY, JUNE 24, 2025
TEMPERATURE (DEGREES F); R = DAILY RECORD
MAX…….99R NORMAL…..78
MIN…….76R NORMAL…..60
MEAN……88 NORMAL…..69
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+19
TOTAL DEPARTURE FOR THE MONTH………………………+73 [+2.8 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….50 DEPARTURE…….-12
TOTAL HEATING UNITS FOR THE SEASON………….5665 DEPARTURE……-542
TOTAL HEATING UNITS LAST SEASON TO DATE……..5391 DEPARTURE……+274
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY…………….23 DEPARTURE…….+18
TOTAL COOLING UNITS FOR THE MONTH……………135 DEPARTURE…….+59
TOTAL COOLING UNITS FOR THE SEASON…………..152 DEPARTURE…….+48
TOTAL COOLING UNITS LAST SEASON TO DATE………141 DEPARTURE…….+11
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 W @ 04:08 P.M.
VECTOR #1 (1-Sec)……….27 W @ 04:08 P.M.
VECTOR #2 (1-Sec)……….29 WNW @ 04:43 P.M.
DAVIS #1……………….28 W @ 04:08 P.M.
DAVIS #2 ………………26 WNW @ 04:08 P.M.
RMY #1 (Instantaneous)…..26 WNW @ 04:03 P.M.
RMY #2 (Instantaneous)…..29 WNW @ 04:43 P.M.
MERLIN…………………25 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 WNW @ 04:30 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 @ 04:08 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 @ 04:51 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 W @ 04:10 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 W @ 04:09 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 WNW @ 04:09 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 WNW @ 04:51 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.9 WNW [261 total miles]
VECTOR #1………………10.9
VECTOR #2………………11.5
DAVIS #1……………….11.3 W
DAVIS #2……………….11.4 WNW
RMY #1…………………10.4 WNW
RMY #2…………………11.3 W
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH…………..1.43 DEPARTURE…..-2.39
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.17 DEPARTURE…..-3.25
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PRELIMINARY CLIMATE SUMMARY FOR JUNE 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
6/1 63/47/55/-7/0.01/588/65 40 W VEC1 40 W RMY 42
6/2 70/48/59/-3/T/780/86 25 WNW VEC1 25 WSW RMY 26
6/3 79/50/65/+3/0.00/853/94 23 SSW VEC1 23 SSW RMY 21
6/4 84/58/71/+8/0.00/708/78 26 SW VEC1 27 SW RMY 28
6/5 93/61/77/+14/0.00/819/90 18 WSW VEC1 18 SW RMY 19
6/6 81/63/72/+9/0.00/382/42 26 ENE VEC1 27 NE RMY 27
6/7 71/60/66/+2/0.95/000/00 26 NE VEC1 26 NE RMY 25 TSTM
6/8 67/55/61/-3/0.00/347/38 22 ENE VEC1 21 ENE RMY 22
6/9 61/55/58/-6/0.01/000/00 20 E VEC1 21 E RMY 20
6/10 62/54/58/-7/0.20/000/00 21 W VEC1 20 W RMY 20
6/11 81/58/70/+5/0.00/850/93 32 WSW VEC1 32 WSW RMY 33
6/12 85/64/75/+10/0.00/814/89 47 WNW VEC1 47 WNW RMY 49
6/13 76/57/67/+1/T/631/69 20 E VEC1 20 E RMY 20
6/14 58/54/56/-10/0.09/000/00 24 NE VEC1 24 NE RMY 24
6/15 67/53/60/-6/0.00/449/49 18 E VEC1 18 E RMY 17
6/16 73/52/63/-4/0.00/641/70 20 SE VEC1 20 ESE RMY 20
6/17 74/57/66/-1/0.12/028/03 22 S VEC1 22 S RMY 23
6/18 75/63/69/+2/0.02/018/02 22 SSW VEC1 23 SSW RMY 23
6/19 90/66/78/+10/0.00/…/.. 31 SSW VEC1 31 SSW RMY 31
6/20 81/66/74/+6/0.00/…/.. 52 WNW VEC1 52 WNW RMY 54
6/21 86/61/74/+6/0.00/…/.. 22 NW VEC1 22 NW RMY 21
6/22 91/68/80/+11/0.03/…/.. 32 W VEC1 32 W RMY 32
6/23 94/71/83/+14/0.00/…/.. 22 SSW VEC1 22 SSW RMY 22
6/24 99/76/88/+19/0.00/…/.. 28 W VEC1 27 W RMY 26
6/25 The low since midnight is 76F, the daily normal low is 61F.
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JUNE DAILY RECORDS TO DATE
6/23 RECORD HIGH MAXIMUM TEMPERATURE OF 94F,
BEATING THE PREVIOUS RECORD OF 93F SET IN 1888
6/24 RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BEATING THE PREVIOUS RECORD OF 70F SET IN 1909
6/24 RECORD HIGH MAXIMUM TEMPERATURE OF 99F,
BEATING THE PREVIOUS RECORD OF 91F SET IN 1914, 1976, 2013
THIS ALSO TIED THE HIGHEST JUNE TEMPERATURE WITH JUNE 4 1919
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JUNE 25
HIGH 93F IN 1943, 1980, 2005
LOW 47F IN 1903
PRECIP 1.38 INS IN 2012
PEAK GUST 51 MPH W IN 1960
RECORDS FOR JUNE 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.63 INS IN 2024
PEAK GUST 48 MPH N IN 1998
TODAY’S REPORT PREPARED BY: MFD/KO
