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Thursday, June 18, 2026

June 18, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA THURSDAY, JUNE 18, 2026 ALL TIMES ARE…

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

THURSDAY, JUNE 18, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0407E
SUNSET:  1924E

OVERCAST AND WARM WITH INCREASING HUMIDITY AND WIND….

Skies have been generally overcast all day with a few minor
breaks of sun during the morning. A few very light showers
have moved through from time to time since the wee hours of
the morning, but they haven’t amounted to any more than a
trace.

Temperatures so far have been held in the low to mid 70s
due to the lack of sunshine, but the dew point has been
rising from the upper 50s early this morning to the mid 60s
by late this morning.

The wind has been quite busy today out of the south. The
average speed for the day so far is around 17mph. Gusts have
been ramping up throughout the day and have been reaching the
50mph mark early this afternoon. So far the peak gust for the
day is 52mph, which occurred after the 1pm observation.

Visibility has been limited all day due to the increased
moisture in the air. The view started the day around 50 miles,
but has dropped to around 35 miles for the remainder of the
day.

The maximum temperature so far today is 73F degrees, which is
3 degrees below the normal high of 76F. The minimum temperature
since midnight is 60F degrees, which is 1 degree above the
normal low of 59F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, overcast cirrostratus, few breaks
in overcast distant NE-SSE, few stratus fractus distant S-W
Temperature: 64F; Dew Point: 58F; Relative Humidity: 80%
Wind: S @ 14G24 kts
Sea-level pressure: 1008.4 mb; 29.78 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 64F
6-hr Min temp: 60F
24-hr Precip: Trace
BHO SA 1155 90 SCT E200 OVC 50 084/64/58/1814G24/978/
FEW BINOVC DSNT NE-SSE FEW STFRA DSNT S-W VIRGA DSNT W-NW
VSBY 35 WNW/ 8/657 56021 6000/ 70000 10064 20060

10 A.M.
Weather: Broken stratocumulus, overcast altocumulus castellanus
Temperature: 71F; Dew Point: 66F; Relative Humidity: 84%
Wind: S @ 19G29 kts, peak wind S 41mph at 9:17 A.M.
Sea-level pressure: 1005.5 mb; 29.69 in. Hg: falling steadily
Visibility: 35 miles, hazy
3-hr Precip: Trace
BHO SA 1455 E23 BKN 110 OVC 35 055/71/66/1919G29/969/
HAZY PK WND 1836/17/ 8/58/ 57029 6000/

1 P.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 72F; Dew Point: 66F; Relative Humidity: 82%
Wind: S @ 22G37 kts, peak wind S 51mph at 12:31 P.M.
Sea-level pressure: 1001.3 mb; 29.57 in. Hg: falling, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 73F
6-hr Min temp: 64F
6-hr Precip: Trace
BHO SA 1755 E20 BKN 75 OVC 35 013/72/66/1922G37/957/
RW-B39E43 HAZY PK WND 1944/31/ 8/52/ 58042 6000/ 10073 20064

————————————————————–

SUMMARY FOR WEDNESDAY, JUNE 17, 2026

TEMPERATURE (DEGREES F)
MAX…….80   NORMAL…..76
MIN…….57   NORMAL…..58
MEAN……69   NORMAL…..67

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2
TOTAL DEPARTURE FOR THE MONTH……………………..+108 [+6.2 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…….-37
TOTAL HEATING UNITS FOR THE SEASON………….6089  DEPARTURE……-115
TOTAL HEATING UNITS LAST SEASON TO DATE……..5665  DEPARTURE……+419

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..4  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH (JUN)………114  DEPARTURE…….+69
TOTAL COOLING UNITS FOR THE SEASON…………..173  DEPARTURE……+101
TOTAL COOLING UNITS LAST SEASON TO DATE……….61  DEPARTURE……+112

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)………..25 SSW  @   04:12 P.M.
VECTOR #1 (1-Sec)……….24 SSW  @   04:11 P.M.
VECTOR #2 (1-Sec)……….27 S    @   04:16 P.M.
DAVIS #1……………….28 S    @   04:12 P.M.
DAVIS #2 ……………….M
RMY #1 (Instantaneous)…..26 SSW  @   04:58 P.M.
RMY #2 (Instantaneous)…..27 S    @   05:08 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……24 SSW  @   05:48 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW  @   05:31 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 SW   @   04:59 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 SSW  @   05:09 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 SSW  @   04:59 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….M
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SSW  @   05:16 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 S    @   05:10 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 SSW  @   05:16 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.3 SW [198 total miles] VECTOR #1……………….9.0
VECTOR #2……………….9.4
DAVIS #1………………..8.6 SW
DAVIS #2………………….M
RMY #1………………….8.9 SW
RMY #2………………….9.5 SW
RICHARDS (C5C)…………..8.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH (JUN)……..0.46 DEPARTURE…..-2.30
TOTAL PRECIPITATION FOR THE YEAR (2026)…….17.26 DEPARTURE…..-8.10

————————————————————–

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 80/57/69/+2/0.00/…/..             25 SSW VEC1 24 SSW RMY 26

6/18 The low since midnight is 60F, the daily normal low is 59F.

————————————————————–

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

RECORDS FOR JUNE 19
HIGH 93F IN 2024
LOW 40F IN 1920
PRECIP 3.92 INS 1922
PEAK GUST 66e MPH NW IN 1940

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
Part I — Data Use Policy
§ 01

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