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Tuesday, June 17, 2025

June 17, 2025

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, JUNE 17, 2025 ALL TIMES ARE…

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

TUESDAY, JUNE 17, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1924E

MAINLY CLOUDY, MILD, AND HUMID WITH ONLY A FEW VERY LIGHT SHOWERS….

A few very light showers moved through early this morning, but so
far it’s been dry since. Clouds however remain stuck over the area
with only a couple of brief glimpses of sun filtered through mid
level clouds. As mentioned, the showers were very light and didn’t
bring any measurable rainfall.

Temperatures have made it to the low to mid 70s despite the cloud
cover. With the dew point in the low to mid 60s, it is definitely
on the humid side out there.

Winds have been steady, but nothing on the strong side. The average
speed for the day so far is about 8mph, and the wind has slowly
veered from the east-southeast to the south-southeast. The peak
gust for the day so far is 21mph, which occurred just before 12pm.

Visibility has been limited a bit today due to thin fog this
morning, and then haziness thereafter. The view has generally been
between 20-40 miles for most of the day, however only 10 miles can
been seen at the 1pm observation off to the south through west due
to rain showers in the vicinity.

The maximum temperature for today is 74F degrees, which is 2
degrees below the normal high of 76F. The minimum temperature
since midnight is 57F degrees, which is 1 degree below the
normal low of 58F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered stratus fractus, overcast altostratus
Temperature: 61F; Dew Point: 60F; Relative Humidity: 95%
Wind: SSE @ 8 kts
Sea-level pressure: 1020.7 mb; 30.14 in. Hg: steady, then rising
Visibility: 20 miles, thin fog
6-hr Max temp: 61F
6-hr Min temp: 57F
24-hr Precip:  Trace
BHO SA 1155 6 SCT 65 OVC 20 207/61/60/1508/014/ THN F ALQDS/ 8/72/
53002 6000/ 70000 10061 20057

10 A.M.
Weather: Broken stratocumulus, overcast altostratus, few breaks
in overcast overhead-ESE
Temperature: 71F; Dew Point: 62F; Relative Humidity: 72%
Wind: SSE @ 7 kts
Sea-level pressure: 1020.3 mb; 30.13 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 65 OVC 30 203/71/62/1507/013/ FEW BINOVC OVHD-ESE
HAZY/ 8/52/ 55004

1 P.M.
Weather: Broken stratocumulus, overcast nimbostratus, virga SSE-SW-WNW
Temperature: 71F Dew Point: 63F; Relative Humidity: 77%
Wind: S @ 8 kts
Sea-level pressure: 1019.6 mb; 30.11 in. Hg: steady, then falling
Visibility: 40 miles, 10 miles SSE-SW-WNW, hazy
6-hr Max temp: 74F
6-hr Min temp: 61F
6-hr Precip:  0.00 inches
BHO SA 1755 E25 BKN 75 OVC 40 196/71/63/1708/011/ VIRGA SSE-SW-WNW
VSBY 10 SSW-WNW HAZY/ 8/52/ 58007 10074 20061

————————————————————–

SUMMARY FOR MONDAY, JUNE 16, 2025

TEMPERATURE (DEGREES F)
MAX…….73   NORMAL…..76
MIN…….52   NORMAL…..58
MEAN……63   NORMAL…..67

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4
TOTAL DEPARTURE FOR THE MONTH……………………….+6 [+0.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..2  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….50  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON………….5665  DEPARTURE……-532
TOTAL HEATING UNITS LAST SEASON TO DATE……..5390  DEPARTURE……+275

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH…………….43  DEPARTURE……..+2
TOTAL COOLING UNITS FOR THE SEASON……………60  DEPARTURE……..-9
TOTAL COOLING UNITS LAST SEASON TO DATE……….74  DEPARTURE…….-14

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)………..20 SE   @   08:43 P.M.
VECTOR #1 (1-Sec)……….20 ESE  @   04:49 P.M.
VECTOR #2 (1-Sec)……….22 SE   @   08:38 P.M.
DAVIS #1……………….19 E    @   04:49 P.M.
DAVIS #2 ………………21 SE   @   08:38 P.M.
RMY #1 (Instantaneous)…..20 SSE  @   09:12 P.M.
RMY #2 (Instantaneous)…..22 SE   @   08:38 P.M.
MERLIN…………………18 ESE
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 SE   @   08:40 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14      @   08:49 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15      @   08:49 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 ESE  @   05:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 S    @   10:20 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..14 ESE  @   05:06 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 SE   @   08:49 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………7.2 ESE [173 total miles] VECTOR #1……………….7.6
VECTOR #2……………….7.7
DAVIS #1………………..7.6 ESE
DAVIS #2………………..7.5 ESE
RMY #1………………….7.4 ESE
RMY #2………………….7.7 E
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..1.26 DEPARTURE…..-1.33
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.00 DEPARTURE…..-2.19

————————————————————–

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/…/..          47 WNW VEC1 47 WNW RMY 49
6/13  76/57/67/+1/T/…/..              20 E   VEC1 20 E   RMY 20
6/14  58/54/56/-10/0.09/…/..          24 NE  VEC1 24 NE  RMY 24
6/15  67/53/60/-6/0.00/…/..           18 E   VEC1 18 E   RMY 17
6/16  73/52/63/-4/0.00/…/..           20 SE  VEC1 20 ESE RMY 20

6/17 The low since midnight is 57F, the daily normal low is 58F.

————————————————————–

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 17
HIGH 93F IN 1894
LOW 44F IN 1920
PRECIP 2.79 INS 2001 (Sub-Tropical storm ALLISON)
PEAK GUST 55e MPH S IN 1977

RECORDS FOR JUNE 18
HIGH 93F IN 1929, 1994
LOW 39F IN 1920
PRECIP 3.36 INS 1998
PEAK GUST 48e MPH W IN 1943

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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