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Wednesday, June 11, 2025

June 11, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JUNE 11, 2025 ALL TIMES ARE…

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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

WEDNESDAY, JUNE 11, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1921E

SUNSHINE RETURNS UNDER MAINLY CLEAR SKIES WITH MUCH WARMER
TEMPERATURES….

Much better weather has returned today after a few days of cloudy,
cool, and at times wet conditions. Skies were completely clear
through the morning hours with diurnal cumulus developing by early
this afternoon. Either way, we’ve seen full sunshine to this
point. Wildfire smoke is also making an appearance well up in
the atmosphere, but has been enough to filter the sun a tiny bit
as well as give the sky a hazy appearance.

Temperatures have warmed to 80F degrees early this afternoon, which
is a big difference from the past couple of days when we barely
made it to the low 60s. The dew point however remains on the higher
side despite a west wind, with values holding generally in the upper
50s.

Winds have been out of the west to west-southwest today, also in
stark contrast to the past couple of days when it was onshore.
The average speed for the day so far is around 12mph. The peak gust
for the day so far is 28mph, which occurred just before 12:30pm.

Visibility has been somewhat limited today due to haziness. The
view has been hanging around 30-40 miles all day.

The maximum temperature for today is 80F degrees, which is 6 degrees
above the normal high of 74F. The minimum temperature since midnight
is 58F degrees, which is 2 degrees above the normal low of 56F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 64F; Dew Point: 58F; Relative Humidity: 82%
Wind: W @ 8G14 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: rising unsteadily
Visibility: 35 miles, hazy
6-hr Max temp: 64F
6-hr Min temp: 58F
24-hr Precip:  0.18 inches
BHO SA 1155 CLR 35 179/64/58/2608G14/006/ THN K LYR ALF ALQDS HAZY/
8/000 52011 70018 10064 20058

10 A.M.
Weather: Clear, thin smoke layer aloft all quadrants
Temperature: 74F; Dew Point: 57F; Relative Humidity: 55%
Wind: W @ 9G17 kts
Sea-level pressure: 1017.6 mb; 30.05 in. Hg: rising, then falling
Visibility: 40 miles, hazy
3-hr Precip:  0.00 inches
BHO SA 1455 CLR 40 176/74/57/2709G17/005/ THN K LYR ALF ALQDS HAZY/
8/000 58003

1 P.M.
Weather: Scattered cumulus
Temperature: 80F Dew Point: 58F; Relative Humidity: 47%
Wind: WSW @ 10G20 kts
Sea-level pressure: 1016.5 mb; 30.02 in. Hg: falling, then more rapidly
Visibility: 30 miles, hazy
6-hr Max temp: 80F
6-hr Min temp: 64F
6-hr Precip:  0.00 inches
BHO SA 1755 50 SCT 30 165/80/58/2410G20/002/ THN K LYR ALF ALQDS
HAZY/ 8/200 58011 10080 20064

————————————————————–

SUMMARY FOR TUESDAY, JUNE 10, 2025

TEMPERATURE (DEGREES F)
MAX…….62   NORMAL…..74
MIN…….54   NORMAL…..56
MEAN……58   NORMAL…..65

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-7
TOTAL DEPARTURE FOR THE MONTH………………………+10 [+0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..7  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………….34  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE SEASON………….5649  DEPARTURE……-535
TOTAL HEATING UNITS LAST SEASON TO DATE……..5384  DEPARTURE……+265

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH…………….26  DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE SEASON……………43  DEPARTURE……..-7
TOTAL COOLING UNITS LAST SEASON TO DATE……….56  DEPARTURE…….-13

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)………..21 W    @   11:59 P.M.
VECTOR #1 (1-Sec)……….20 W    @   11:58 P.M.
VECTOR #2 (1-Sec)……….19 W    @   11:53 P.M.
DAVIS #1……………….20 W    @   11:59 P.M.
DAVIS #2 ………………18 W    @   11:19 P.M.
RMY #1 (Instantaneous)…..20 W    @   11:55 P.M.
RMY #2 (Instantaneous)…..20 WSW  @   11:48 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 W    @   11:53 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14      @   11:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14      @   11:57 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 W    @   11:53 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 W    @   11:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 W    @   11:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 W    @   11:57 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………4.9 NE [118 total miles] VECTOR #1……………….5.6
VECTOR #2……………….5.7
DAVIS #1………………..5.2 NE
DAVIS #2………………..5.1 NE
RMY #1………………….5.4 NE
RMY #2………………….5.6 NNE
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.18 DEPARTURE…..+0.02
TOTAL PRECIPITATION FOR THE MONTH…………..1.17 DEPARTURE…..-0.44
TOTAL PRECIPITATION FOR THE YEAR (2025)…….22.91 DEPARTURE…..-1.30

————————————————————–

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/…/..          18 WSW VEC1 18 SW  RMY 19
6/6   81/63/72/+9/0.00/…/..           26 ENE VEC1 27 NE  RMY 27
6/7   71/60/66/+2/0.95/…/..           26 NE  VEC1 26 NE  RMY 25 TSTM
6/8   67/55/61/-3/0.00/…/..           22 ENE VEC1 21 ENE RMY 22
6/9   61/55/58/-6/0.01/…/..           20 E   VEC1 21 E   RMY 20
6/10  62/54/58/-7/0.20/…/..           21 W   VEC1 20 W   RMY 20

6/11 The low since midnight is 58F, the daily normal low is 56F.

————————————————————–

JUNE DAILY RECORDS TO DATE

NONE.

————————————————————–

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)

RECORDS FOR JUNE 11
HIGH 92F IN 1973, 1984, 1997
LOW 40F IN 1972
PRECIP 2.66 INCHES IN 1922
PEAK GUST 43e MPH S IN 1945

RECORDS FOR JUNE 12
HIGH 94F IN 2017
LOW 40F IN 1906
PRECIP 1.79 INS 1955
PEAK GUST 58 MPH NW IN 1991

TODAY’S REPORT PREPARED BY: MFD

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Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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