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Thursday, June 5, 2025

June 5, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 5, 2025 ALL TIMES ARE…

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

THURSDAY, JUNE 5, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET:  1918E

SUMMER HEAT ARRIVES TODAY ALONG WITH HUMID CONDITIONS AND HAZY
SUNSHINE….

An upper level ridge is cresting over the region today bringing
with it a solid taste of summer. We are observing hazy, hot, and
humid conditions today, more akin to mid July. Plenty of sunshine
has been the theme as well with only some high thin cirrus clouds
passing through the area. With the convective temperature being
exceeded, cumulus clouds have also been building early this
afternoon, but so far haven’t been enough to block the sun at all.
The wildfire smoke that plagued our sky yesterday has for the most
part moved out over the ocean, giving us more of a blue sky today
despite the overall haziness.

Temperatures have warmed into the low 90s early this afternoon.
This marks the first 90F degree temperature of the season so far.
Dew point values have made it to the mid 60s, making for a rather
humid feeling out there today. Thanks to the combination of the
temperature and dew point, we’re seeing heat indices that have
reached as high as the mid 90s at times. Use caution if outdoors
this afternoon, especially since this is our first taste of summer
heat, thus we’re not acclimated to it.

To add misery to the feel of the air, the wind has become very light
by late this morning and early this afternoon, even going calm for
a time. The lack of air movement is simply not fun on a day like
today. The average wind speed for the day so far is around 9mph,
most of which occurred before 9am. The peak gust so far today is
18mph, which occurred around 12:45am this morning.

Visibility has been quite limited today due to haziness. The view
has decreased a bit from 25 miles early this morning to only 20
miles by early this afternoon.

The maximum temperature for today is 92F degrees, which is 20 degrees
above the normal high of 72F. The minimum temperature since midnight
is 61F degrees, which is 7 degrees above the normal low of 54F.

————————————————————–

Today’s Observations:

7 A.M.
Weather:  Clear, few cirrus all quadrants
Temperature: 70F; Dew Point: 61F; Relative Humidity: 74%
Wind: W @ 8 kts
Sea-level pressure: 1018.1 mb; 30.06 in. Hg: rising, then more slowly
Visibility: 25 miles, hazy
6-hr Max temp: 70F
6-hr Min temp: 61F
24-hr Precip:  0.00 inches
BHO SA 1155 CLR 25 181/70/61/2808/006/ FEW CI ALQDS HAZY/
8/001 51009 10070 20061

10 A.M.
Weather: Scattered cirrus
Temperature: 84F; Dew Point: 67F; Relative Humidity: 56%
Wind: Calm
Sea-level pressure: 1017.4 mb; 30.04 in. Hg: steady, then falling
Visibility: 20 miles, hazy
3-hr Precip:  0.00 inches
BHO SA 1455 250 SCT 20 174/84/67/0000/004/ HAZY WND CALM/ 8/004 58007

1 P.M.
Weather: Broken cumulus, broken altocumulus, thin broken cirrus
Temperature: 90F Dew Point: 64F; Relative Humidity: 42%
Wind: WNW @ 2 kts, wind light and variable
Sea-level pressure: 1015.6 mb; 29.99 in. Hg: falling, then more rapidly
Visibility: 20 miles, hazy
6-hr Max temp: 92F
6-hr Min temp: 70F
6-hr Precip:  0.00 inches
BHO SA 1755 E35 BKN 85 BKN 250 -BKN 20 156/90/64/3002/999/ HAZY
WND L/V/ 8/261 58018 10092 20070

————————————————————–

SUMMARY FOR WEDNESDAY, JUNE 4, 2025

TEMPERATURE (DEGREES F)
MAX…….84   NORMAL…..72
MIN…….58   NORMAL…..54
MEAN……71   NORMAL…..63

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+8
TOTAL DEPARTURE FOR THE MONTH……………………….+1 [+0.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………….16  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON………….5631  DEPARTURE……-532
TOTAL HEATING UNITS LAST SEASON TO DATE……..5379  DEPARTURE……+252

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..6  DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………..6  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE SEASON……………23  DEPARTURE…….-12
TOTAL COOLING UNITS LAST SEASON TO DATE……….44  DEPARTURE…….-21

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)………..26 SW   @   11:43 A.M.
VECTOR #1 (1-Sec)……….27 SW   @   11:43 A.M.
VECTOR #2 (1-Sec)……….27 WSW  @   11:43 A.M.
DAVIS #1……………….25 S    @   04:04 P.M.
DAVIS #2 ………………30 S    @   04:06 P.M.
RMY #1 (Instantaneous)…..28 SW   @   11:43 A.M.
RMY #2 (Instantaneous)…..27 WSW  @   11:43 A.M.
MERLIN…………………25 SW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 SSW  @   07:38 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18      @   11:45 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20      @   11:44 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 SW   @   11:45 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 S    @   04:06 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SW   @   11:45 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 WSW  @   11:44 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..12.6 SW [303 total miles] VECTOR #1………………12.7
VECTOR #2………………13.2
DAVIS #1……………….12.5 SW
DAVIS #2……………….13.4 SW
RMY #1…………………12.5 SW
RMY #2…………………13.4 SW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.01 DEPARTURE…..-0.63
TOTAL PRECIPITATION FOR THE YEAR (2025)…….21.75 DEPARTURE…..-1.49

————————————————————–

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 The low since midnight is 61F, the daily normal low is 54F.

————————————————————–

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 5
HIGH 95F IN 1930
LOW 41F IN 1891
PRECIP 2.83 INS IN 1982
PEAK GUST 57 MPH NNW IN 1988

RECORDS FOR JUNE 6
HIGH 95F IN 1925
LOW 42F IN 1885, 1894, 1945
PRECIP 3.61 INS IN 2000
PEAK GUST 58 MPH NE IN 2000

TODAY’S REPORT PREPARED BY: MFD

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Data Use & Privacy Policy

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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