Friday, June 26, 2026

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

FRIDAY, JUNE 26, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0409E
SUNSET:  1925E

SKY BEGINS TO CLEAR AFTER LIGHT MORNING RAIN….

Light rain began this morning around 5:30 AM and continued on and off
throughout the morning. By 1:00 PM we measured a total of 0.06 inches.
This was not enough precipitation to make a dent in our current drought
conditions. Currently, we stand 7.92 inches below our normal annual
rainfall.

With the rain, we saw foggy, humid conditions throughout the morning.
The fog was dense at 7:00 AM, leaving only 1/8 of a mile of visibility.
Visibility increased to 40 miles around the 10:00 AM observation time.
Conditions began to dry out, making for a less humid and mild afternoon.

The sky remained overcast throughout the observation period. After the
final 1:00 PM observation, the clouds began to break and sunshine
returned.
Morning temperatures were below seasonable and consistent around 64°F.
Once the sun returned, the temperature to 75F still below but closer to
seasonable temperatures.

This week wind speed has continued to be on the lower end with a couple
of calm hours. Today has continued on trend with light wind. Wind was
strongest mid morning during this time a peak gust so far of
approximately 17 kts (20 MPH) was recorded.

The maximum temperature so far today is 70°F, which is 9 degrees below
the normal high of 79°F. The minimum temperature since midnight is 64°F,
which is 3 degrees above the normal low of 61°F.

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Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200 ft, light rain
Temperature: 64F; Dew Point: 64F; Relative Humidity: 100%
Wind: S @ 6 kts, wind light
Sea-level pressure: 1019.4 mb; 30.10 in. Hg: steady then rising
Visibility: 1/8 mile,fog
6-hr Max temp: 65F
6-hr Min temp: 63F
24-hr Precip: 0.05 inches
BHO SA 1155 X W2 1/8R-F 194/64/64/1706/010/ WND LGT/ 8////
53002 70005 10065 20063

10 A.M.
Weather: Broken stratus fractus, overcast stratus
Temperature: 69F; Dew Point: 64F; Relative Humidity: 85%
Wind: SSW @ 7 kts
Sea-level pressure: 1018.7 mb; 30.08 in. Hg: falling, then more slowly
Visibility: 40 miles
3-hr Precip: 0.01 inches
BHO SA 1455 E10 BKN 40 OVC 40 187/69/64/2007/008/ 8/6// 56007 6001/

1 P.M.
Weather: Scattered stratus fractus, overcast stratus, few thin
spot in overcast overhead
Temperature: 70F; Dew Point: 65F; Relative Humidity: 84%
Wind: SW @ 4 kts, wind light
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: steady then falling
Visibility: 40 miles
6-hr Max temp: 70F
6-hr Min temp: 64F
6-hr Precip: Trace
BHO SA 1755 20 SCT E30 OVC 40 178/70/65/2204/006/ THN SPTS IOVC
OVHD WSW-W WND LGT/ 8/6// 58009 6000/ 10070 20064
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SUMMARY FOR THURSDAY, JUNE 25, 2026

TEMPERATURE (DEGREES F)
MAX…….82   NORMAL…..79
MIN…….60   NORMAL…..61
MEAN……71   NORMAL…..70

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+1
TOTAL DEPARTURE FOR THE MONTH……………………..+111 [+4.4 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…….-46
TOTAL HEATING UNITS FOR THE SEASON………….6084  DEPARTURE……-124
TOTAL HEATING UNITS LAST SEASON TO DATE……..5665  DEPARTURE…….419

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..6  DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH (JUN)………145  DEPARTURE…….+64
TOTAL COOLING UNITS FOR THE SEASON…………..204  DEPARTURE…….+95
TOTAL COOLING UNITS LAST SEASON TO DATE………152  DEPARTURE…….+46

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)………..20 WNW  @   02:48 P.M.
VECTOR #1 (1-Sec)……….20 SSW  @   11:13 P.M.
VECTOR #2 (1-Sec)……….20 WNW  @   12:29 A.M.
DAVIS #1……………….20 S    @   11:13 P.M.
DAVIS #2 ………………21 S    @   11:28 P.M.
RMY #1 (Instantaneous)…..20 SSW  @   11:13 P.M.
RMY #2 (Instantaneous)…..21 SSW  @   11:53 P.M.
MERLIN…………………19 S
RICHARDS (C5C) (Inst)……20 SSW  @   11:13 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 SSW  @   11:13 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 SSW  @   11:13 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 SSW  @   11:13 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 S    @   11:13 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S    @   11:30 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 SSW  @   11:13 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 S    @   11:13 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14 SSW  @   11:13 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.8 W   [163 total miles] VECTOR #1……………….7.7
VECTOR #2……………….8.0
DAVIS #1………………..7.6 W
DAVIS #2………………..7.5 W
RMY #1………………….7.6 W
RMY #2………………….7.9 WSW
RICHARDS (C5C)…………..7.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.05 DEPARTURE…..-0.09
TOTAL PRECIPITATION FOR THE MONTH (JUN)……..1.84 DEPARTURE…..-2.12
TOTAL PRECIPITATION FOR THE YEAR (2026)…….18.64 DEPARTURE…..-7.92

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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 77/60/69/0/0.39/…/..              31 SSE VEC1 31 SSE RMY 31
6/23 68/62/65/-4/…./…/..             28 S   VEC1 28 S   RMY 28
6/24 81/59/70/+1/0.00/…/..             28 W   VEC1 27 W   RMY 27
6/25 82/60/71/+1/0.00/…/..             20 WNW VEC1 20 SSW RMY 20

6/26 The low since midnight is 63F, the daily normal low is 61F.

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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 26
HIGH 96F IN 1952
LOW 45F IN 1986
PRECIP 1.63 INS IN 2024
PEAK GUST 48 MPH N IN 1998

RECORDS FOR JUNE 27
HIGH 93F IN 1999, 2007
LOW 46F IN 1897
PRECIP 1.72 INS IN 1938
PEAK GUST 55e N IN 1945

TODAY’S REPORT PREPARED BY: Kaitlin A Geagan