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Wednesday, June 17, 2026

June 17, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA WEDNESDAY, JUNE 17, 2026 ALL TIMES ARE…

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

WEDNESDAY, JUNE 17, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1924E

A LITTLE WARMER UNDER A MIX OF SUN AND CLOUDS….

Today has featured a mix of sun and clouds throughout the
day. Overall it’s been a great day to be outdoors, albeit
feeling a little hot in the sun. Nonetheless, temperatures
are tolerable with very comfortable humidity levels again
today.

Temperatures are a touch warmer than yesterday, reaching
the 80F degree mark by the 1pm observation. Dew points how-
ever remain in the low to mid 50s which is spectacular and
very comfortable for this time of year.

The wind has been nothing to write home about today. It has
been on the light side all day and has gradually backed from
a westerly direction to a southerly direction as the day has
progressed. The average speed for the day so far is only
around 7mph. The peak gust so far is 18mph which occurred
right around 2:40am this morning.

Visibility has been decent again today with the view holding
at around 60 miles all day.

The maximum temperature so far today is 80F degrees, which is
4 degrees above 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: Broken altocumulus castellanus, broken cirrus
Temperature: 64F; Dew Point: 54F; Relative Humidity: 70%
Wind: W @ 4 kts, wind light
Sea-level pressure: 1011.4 mb; 29.87 in. Hg: rising, then steady
Visibility: 60 miles
6-hr Max temp: 64F
6-hr Min temp: 57F
24-hr Precip: 0.00 inches
BHO SA 1155 E70 BKN 250 BKN 60 114/64/54/2604/987/ WND LGT/
8/081 51002 10064 20057

10 A.M.
Weather: Broken cumulus, broken cirrus
Temperature: 76F; Dew Point: 51F; Relative Humidity: 43%
Wind: SSW @ 4 kts, wind light
Sea-level pressure: 1011.4 mb; 29.87 in. Hg: rising, then falling
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E65 BKN 250 BKN 60 114/76/51/2004/987/ WND LGT/
8/201 50000

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 80F; Dew Point: 53F; Relative Humidity: 39%
Wind: S @ 3 kts, wind light and variable
Sea-level pressure: 1009.4 mb; 29.81 in. Hg: falling, then more rapidly
Visibility: 60 miles
6-hr Max temp: 80F
6-hr Min temp: 64F
6-hr Precip: 0.00 inches
BHO SA 1755 E65 BKN 250 BKN 60 094/80/53/1803/981/ WND L/V/
8/201 58020 10080 20064

————————————————————–

SUMMARY FOR TUESDAY, JUNE 16, 2026

TEMPERATURE (DEGREES F)
MAX…….77   NORMAL…..76
MIN…….54   NORMAL…..58
MEAN……66   NORMAL…..67

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH……………………..+106 [+6.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE MONTH (JUN)……….17  DEPARTURE…….-36
TOTAL HEATING UNITS FOR THE SEASON………….6089  DEPARTURE……-113
TOTAL HEATING UNITS LAST SEASON TO DATE……..5665  DEPARTURE……+419

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..1  DEPARTURE……..-3
TOTAL COOLING UNITS FOR THE MONTH (JUN)………110  DEPARTURE…….+69
TOTAL COOLING UNITS FOR THE SEASON…………..169  DEPARTURE……+100
TOTAL COOLING UNITS LAST SEASON TO DATE……….60  DEPARTURE……+109

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 *=Last of multiple occurrences

F420C (Official)………..22 W    @   11:01 A.M.*
VECTOR #1 (1-Sec)……….22 W    @   11:01 A.M.
VECTOR #2 (1-Sec)……….22 WNW  @   12:17 P.M.*
DAVIS #1……………….21 W    @   11:01 A.M.
DAVIS #2 ………………20 WSW  @   11:01 A.M.
RMY #1 (Instantaneous)…..22 W    @   11:01 P.M.
RMY #2 (Instantaneous)…..22 W    @   02:24 P.M.*
MERLIN…………………21 W
RICHARDS (C5C) (Inst)……21 WNW  @   12:17 P.M.*

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 WNW  @   12:28 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 W    @   02:42 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 W    @   12:05 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 W    @   12:43 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 W    @   12:05 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 W    @   02:24 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 W    @   12:05 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 W    @   12:43 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.3 NW [222 total miles] VECTOR #1……………….9.7
VECTOR #2………………10.0
DAVIS #1………………..9.8 WNW
DAVIS #2………………..9.8 WNW
RMY #1………………….9.6 WNW
RMY #2………………….9.8 WNW
RICHARDS (C5C)…………..9.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH (JUN)……..0.46 DEPARTURE…..-2.13
TOTAL PRECIPITATION FOR THE YEAR (2026)…….17.26 DEPARTURE…..-7.93

————————————————————–

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  60/45/53/-9/T/606/67                26 ENE VEC1 27 ENE RMY 27
6/2  75/45/60/-2/0.00/680/75             22 NNW VEC1 22 NNW RMY 21
6/3  82/56/69/+7/0.00/880/97             28 S   VEC1 28 S   RMY 29
6/4  88/57/73/+10/0.00/817/90            23 WNW VEC1 23 SW  RMY 23
6/5  87/60/74/+11/0.00/810/89            20 NW  VEC1 19 NW  RMY 21
6/6  86/64/75/+12/0.09/232/31            46 WSW VEC1 45 WSW RMY 48
6/7  78/55/67/+3/0.26/…/..             38 NE  VEC1 38 NE  RMY 42
6/8  77/52/65/+1/0.00/…/..             20 SW  VEC1 20 SW  RMY 21
6/9  83/56/70/+6/0.00/…/..             28 W   VEC1 27 W   RMY 30
6/10 88/59/74/+9/0.00/…/..             30 SSW VEC1 30 SSW RMY 30
6/11 90/64/77/+12/0.10/…/..            22 WNW VEC1 22 WNW RMY 23
6/12 91/74/83/+18/0.00/…/..            21 WNW VEC1 21 WNW RMY 22
6/13 87/68/78/+12/0.00/…/..            36 NW  VEC1 36 NW  RMY 38
6/14 88/65/77/+11/0.00/…/..            33 SSW VEC1 32 SSW RMY 34
6/15 82/61/72/+6/0.00/…/..             28 SSW VEC1 28 SSW RMY 28
6/16 77/54/66/-1/0.00/…/..             22 W   VEC1 22 W   RMY 22

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

————————————————————–

JUNE DAILY RECORDS TO DATE

6/12 NEW RECORD HIGH MINIMUM TEMPERATURE OF 74F;
BEATING OLD RECORD OF 69F SET IN 1942 AND 2017

————————————————————–

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: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

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

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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§ 01

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