Monday, June 22, 2026

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

MONDAY, JUNE 22, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0408E
SUNSET:  1925E

INCREASING CLOUDS WITH MUCH NEEDED RAIN DEVELOPING BY THE EARLY
AFTERNOON….

We started the day with some sunshine with only some high thin
cirrus clouds overhead, however these clouds quickly increased
and thickened with overcast skies taking over by the mid morning
hours. Rain arrived in the area by early afternoon with 0.03″
falling by the 1pm observation. This rainfall is much needed
as the rainfall deficits have surpassed the 2 inch mark for
the month, and 8 inch mark for the year to date.

Temperatures rose quickly early this morning during the time
we had some sunshine. Readings reached the upper 70s. They have
since cooled back some into the mid to upper 60s now that the
clouds and rain have taken over. The humidity level is bumping
up some as one would expect with the dew point reaching the
low 60s by early this afternoon.

Winds were quite light during the morning as they gradually
shifted from the northwest to the south-southwest. It has
started to pick up a bit early this afternoon. The average
speed for the day so far is around 7mph, but the trend is
increasing in the last hour or two. The peak gust so far is
23mph, which occurred just before 12:30pm this afternoon.

Visibility started off quite decent with a view of around 70
miles early this morning. Now with the rain moving in, the view
has decreased markedly to generally under 10 miles.

The maximum temperature so far today is 77F degrees, which is
1 degree below the normal high of 78F. The minimum temperature
since midnight is 60F degrees, which is equal to the normal
low of 60F.

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Today’s Observations:

7 A.M.
Weather: Broken cirrus, few altocumulus distant S-WNW
Temperature: 70F; Dew Point: 58F; Relative Humidity: 65%
Wind: NNW @ 2 kts, wind light
Sea-level pressure: 1018.8 mb; 30.09 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 70F
6-hr Min temp: 60F
24-hr Precip: 0.00 inches
BHO SA 1155 E250 BKN 70 188/70/58/3402/009/ FEW AC DSNT S-WNW
WND LGT/ 8/054 51014 10070 20060

10 A.M.
Weather: Broken altocumulus, overcast cirrostratus, few breaks in
overcast distant NNW-NE, few cumulus distant WNW-NNE
Temperature: 76F; Dew Point: 58F; Relative Humidity: 54%
Wind: S @ 4 kts, wind light
Sea-level pressure: 1018.6 mb; 30.08 in. Hg: falling, then rising
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E120 BKN 180 OVC 50 186/76/58/1904/008/
FEW BINOVC DSNT NNW-NE FEW CU DSNT WNW-NNE WND LGT/ 8/257 55002

1 P.M.
Weather: Overcast nimbostratus, light rain
Temperature: 67F; Dew Point: 63F; Relative Humidity: 87%
Wind: SW @ 9 kts
Sea-level pressure: 1019.8 mb; 30.11 in. Hg: rising, then more rapidly
Visibility: 10 miles, thin fog
6-hr Max temp: 77F
6-hr Min temp: 67F
6-hr Precip: 0.03 inches
BHO SA 1755 E95 OVC 10R- 198/67/63/2209/011/ THN F ALQDS/
8/02/ 53012 6003/ 10077 20067

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SUMMARY FOR SUNDAY, JUNE 21, 2026

TEMPERATURE (DEGREES F)
MAX…….82   NORMAL…..77
MIN…….58   NORMAL…..60
MEAN……70   NORMAL…..68

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+2
TOTAL DEPARTURE FOR THE MONTH……………………..+113 [+5.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH (JUN)……….17  DEPARTURE…….-43
TOTAL HEATING UNITS FOR THE SEASON………….6084  DEPARTURE……-120
TOTAL HEATING UNITS LAST SEASON TO DATE……..5665  DEPARTURE……+419

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..5  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH (JUN)………130  DEPARTURE…….+69
TOTAL COOLING UNITS FOR THE SEASON…………..189  DEPARTURE……+100
TOTAL COOLING UNITS LAST SEASON TO DATE……….96  DEPARTURE…….+93

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)………..24 WNW  @   11:45 A.M.
VECTOR #1 (1-Sec)……….24 NW   @   01:43 P.M.
VECTOR #2 (1-Sec)……….26 NW   @   03:34 P.M.
DAVIS #1……………….23 W    @   10:50 A.M.
DAVIS #2 ………………23 W    @   03:09 P.M.
RMY #1 (Instantaneous)…..25 WNW  @   03:34 P.M.
RMY #2 (Instantaneous)…..25 NW   @   03:34 P.M.
MERLIN…………………23 W
RICHARDS (C5C) (Inst)……24 WNW  @   03:34 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 WNW  @   01:20 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 W    @   01:04 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 W    @   01:04 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 W    @   01:04 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 W    @   01:04 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 WNW  @   10:59 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 W    @   01:04 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 WNW  @   10:59 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.3 WNW [198 total miles] VECTOR #1……………….9.0
VECTOR #2……………….9.5
DAVIS #1………………..9.2 WNW
DAVIS #2………………..8.5 WNW
RMY #1………………….8.8 WNW
RMY #2………………….9.3 WNW
RICHARDS (C5C)…………..9.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH (JUN)……..1.10 DEPARTURE…..-2.29
TOTAL PRECIPITATION FOR THE YEAR (2026)…….17.90 DEPARTURE…..-8.09

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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/+12/0.09/282/31            46 WSW VEC1 45 WSW RMY 48
6/7  78/55/67/+3/0.26/446/49             38 NE  VEC1 38 NE  RMY 42
6/8  77/52/65/+1/0.00/904/99             20 SW  VEC1 20 SW  RMY 21
6/9  83/56/70/+6/0.00/886/97             28 W   VEC1 27 W   RMY 30
6/10 88/59/74/+9/0.00/686/75             30 SSW VEC1 30 SSW RMY 30
6/11 90/64/77/+12/0.10/631/69            22 WNW VEC1 22 WNW RMY 23
6/12 91/74/83/+18/0.00/412/45            21 WNW VEC1 21 WNW RMY 22
6/13 87/68/78/+12/0.00/769/84            36 NW  VEC1 36 NW  RMY 38
6/14 88/65/77/+11/0.00/495/54            33 SSW VEC1 32 SSW RMY 34
6/15 82/61/72/+6/0.00/577/63             28 SSW VEC1 28 SSW RMY 28
6/16 77/54/66/-1/0.00/898/98             22 W   VEC1 22 W   RMY 22
6/17 80/57/69/+2/0.00/697/76             25 SSW VEC1 24 SSW RMY 26
6/18 76/60/68/+1/0.64/193/21             51 S   VEC1 52 SSW RMY 54
6/19 78/60/69/+1/0.00/880/96             41 W   VEC1 40 W   RMY 41
6/20 77/60/69/+1/0.00/807/88             40 WNW VEC1 39 WNW RMY 40 TSTM
6/21 82/58/70/+2/0.00/…/..             24 WNW VEC1 24 NW  RMY 25

6/22 The low since midnight is 60F, the daily normal low is 60F.

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JUNE DAILY RECORDS TO DATE

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

6/18 RECORD PEAK WIND GUST OF 51 MPH,
BEATING THE OLD RECORD OF 48e MPH SET IN 1943

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

RECORDS FOR JUNE 22
HIGH 93F IN 1921, 2012
LOW 43F IN 1940
PRECIP 1.57 INS IN 1900
PEAK GUST 74 MPH NW IN 1988

RECORDS FOR JUNE 23
HIGH 94F IN 2025
LOW 45F IN 1885
PRECIP 0.76 INS IN 1893
PEAK GUST 63 MPH SE IN 1972 (AGNES)

TODAY’S REPORT PREPARED BY: Matt Douglas