Tuesday, July 1, 2025

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

TUESDAY, JULY 1, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0411E
SUNSET:  1925E

WARM AND VERY HUMID WITH A MIX OF SUN AND CLOUDS TODAY….

Clouds were more dominant this morning, but more breaks of sun
have developed early this afternoon. It is once again another
warm and very humid day as this air mass gets advected into
the area by a gusty southwest breeze.

Temperatures have warmed into the mid 80s by early this afternoon.
The dew point has been on the rise as well, from the low 70s early
this morning to the oppressive mid 70s by early this afternoon.
This combination of temperature and dew point is creating heat
index values into the low to mid 90s!

The wind has been busy today, averaging at around 13mph out of
the southwest. Gusts have been frequently exceeding 25mph, with a
peak gust so far of 35mph, which occurred just before 11am this
morning.

Visibility is somewhat limited, due to fog early this morning, and
then haziness thereafter. The view has generally been between
25-40 miles most of the day, however it was quite limited very
early this morning when we were in the clouds, generally around
1/8th of a mile.

The maximum temperature for today is 86F degrees, which is 6 degrees
above the normal high of 80F. The minimum temperature since midnight
is 68F degrees, which is 6 degrees above the normal low of 62F.

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PRELIMINARY STATS FOR JUNE 2025

TEMPERATURE, Deg. F
Avg. Max. 78.5 [+3.1] Avg. Min. 59.8 [+2.2] Mean      69.2 [+2.7] 24-hour corrected mean: 68.1
Max. for month: 99F on the 24th
Min. for month: 47F on the 1st

HEATING DEGREE DAYS
Total heating units:     50 [-016] Total for the season:  5665 [-545] Total for last season: 5392

COOLING DEGREE DAYS
Total cooling units:    183 [+072] Total for the season:   200 [+061] Total for last season:  178

PRECIPITATION, Inches
Total: 1.49 [-3.14] Greatest in 24 hrs: 0.95 on the 7th

SNOWFALL, Inches
Total: 0.0 [ 0.0] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed:  9.5 mph
Avg. corrected wind speed:   10.1 mph
Prevailing wind direction:   East-Northeast [13%] Peak gust and direction:  52 WNW on the 20th

SUNSHINE:
Campbell-Stokes card minutes: 14580 of a possible 26376, or 55%
Astronomical total minutes: 15137 of a possible 27418 or 55%

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Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, few breaks in overcast all quadrants,
higher clouds visible all quadrants
Temperature: 73F; Dew Point: 71F; Relative Humidity: 92%
Wind: SW @ 10G17 kts
Sea-level pressure: 1012.1 mb; 29.89 in. Hg: falling, then rising
Visibility: 25 miles, thin fog
6-hr Max temp: 73F
6-hr Min temp: 68F
24-hr Precip:  0.00 inches
BHO SA 1155 E7 OVC 25 121/73/71/2210G17/989/ FEW BINOVC ALQDS
HIER CLDS VSBL ALQDS THN F ALQDS/ 8/5// 55002 10073 20068

10 A.M.
Weather: Scattered stratocumulus, broken altocumulus
Temperature: 82F; Dew Point: 73F; Relative Humidity: 73%
Wind: SW @ 13G23 kts
Sea-level pressure: 1010.7 mb; 29.85 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 15 SCT E120 BKN 30 107/82/73/2213G23/985/ HAZY/ 8/550
56014

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 85F Dew Point: 74F; Relative Humidity: 69%
Wind: WSW @ 10G22 kts
Sea-level pressure: 1009.9 mb; 29.82 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 86F
6-hr Min temp: 73F
6-hr Precip:  0.00 inches
BHO SA 1755 E30 BKN 250 BKN 40 099/85/74/2410G22/982/ HAZY/ 8/201
58008 10086 20073

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SUMMARY FOR MONDAY, JUNE 30, 2025

TEMPERATURE (DEGREES F)
MAX…….90  NORMAL…..80
MIN…….65  NORMAL…..62
MEAN……78  NORMAL…..71

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+7
TOTAL DEPARTURE FOR THE MONTH………………………+89 [+2.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2024 THRU JUN 2025)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE MONTH…………….50  DEPARTURE…….-16
TOTAL HEATING UNITS FOR THE SEASON………….5665  DEPARTURE……-545
TOTAL HEATING UNITS LAST SEASON TO DATE……..5392  DEPARTURE……+273

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY…………….13  DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE MONTH……………183  DEPARTURE…….+72
TOTAL COOLING UNITS FOR THE SEASON…………..200  DEPARTURE…….+61
TOTAL COOLING UNITS LAST SEASON TO DATE………178  DEPARTURE…….+22

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)……….E22 SSW  @   05:03 P.M.
VECTOR #1 (1-Sec)……….22 SSW  @   05:03 P.M.
VECTOR #2 (1-Sec)……….23 S    @   03:58 P.M.
DAVIS #1……………….22 S    @   03:57 P.M.
DAVIS #2 ………………28 S    @   03:58 P.M.
RMY #1 (Instantaneous)…..22 SSW  @   03:57 P.M.
RMY #2 (Instantaneous)…..23 S    @   03:56 P.M.
MERLIN…………………21 SW
RICHARDS (C5C) (Inst)…..OTS

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SSW  @   04:26 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16      @   04:22 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17      @   03:58 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 S    @   03:59 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 S    @   03:58 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 SW   @   04:22 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 S    @   03:58 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.6 SW [159 total miles] VECTOR #1……………….7.4
VECTOR #2……………….7.6
DAVIS #1………………..6.9 SW
DAVIS #2………………..7.4 SW
RMY #1………………….7.2 SW
RMY #2………………….7.6 SW
RICHARDS (C5C)…………..OTS

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.49 DEPARTURE…..-3.14
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.23 DEPARTURE…..-4.00

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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   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/+10/0.00/814/89          47 WNW VEC1 47 WNW RMY 49
6/13  76/57/67/+1/T/631/69              20 E   VEC1 20 E   RMY 20
6/14  58/54/56/-10/0.09/000/00          24 NE  VEC1 24 NE  RMY 24
6/15  67/53/60/-6/0.00/449/49           18 E   VEC1 18 E   RMY 17
6/16  73/52/63/-4/0.00/641/70           20 SE  VEC1 20 ESE RMY 20
6/17  74/57/66/-1/0.12/028/03           22 S   VEC1 22 S   RMY 23
6/18  75/63/69/+2/0.02/018/02           22 SSW VEC1 23 SSW RMY 23
6/19  90/66/78/+10/0.00/523/57          31 SSW VEC1 31 SSW RMY 31
6/20  81/66/74/+6/0.00/853/93           52 WNW VEC1 52 WNW RMY 54
6/21  86/61/74/+6/0.00/871/95           22 NW  VEC1 22 NW  RMY 21
6/22  91/68/80/+11/0.03/477/52          32 W   VEC1 32 W   RMY 32
6/23  94/71/83/+14/0.00/807/88          22 SSW VEC1 22 SSW RMY 22
6/24  99/76/88/+19/0.00/880/96          28 W   VEC1 27 W   RMY 26
6/25  93/76/85/+15/0.00/824/90          20 NW  VEC1 20 NW  RMY 20
6/26  77/58/68/-2/0.03/000/00           30 E   VEC1 30 E   RMY 29
6/27  75/58/67/-3/0.00/522/57           22 S   VEC1 22 S   RMY 22
6/28  72/58/65/-5/0.03/000/00           20 SSE VEC1 20 SSE RMY 20
6/29  88/62/75/+4/0.00/668/73           24 WNW VEC1 24 WNW RMY 24
6/30  90/65/78/+7/0.00/804/88           22 SSW VEC1 22 SSW RMY 22

7/1 The low since midnight is 68F, the daily normal low is 62F.

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JUNE DAILY RECORDS TO DATE

6/23 RECORD HIGH MAXIMUM TEMPERATURE OF 94F,
BEATING THE PREVIOUS RECORD OF 93F SET IN 1888

6/24 RECORD HIGH MINIMUM TEMPERATURE OF 76F,
BEATING THE PREVIOUS RECORD OF 70F SET IN 1909

6/24 RECORD HIGH MAXIMUM TEMPERATURE OF 99F,
BEATING THE PREVIOUS RECORD OF 91F SET IN 1914, 1976, 2013
THIS ALSO TIED THE HIGHEST JUNE TEMPERATURE WITH JUNE 4 1919

6/25 RECORD HIGH MINIMUM TEMPERATURE OF 76,
BEATING THE PREVIOUS RECORD OF 71F SET IN 1909

6/25 RECORD HIGH MAXIMUM TEMPERATURE OF 93F,
TIED WITH PREVIOUS OCCURRENCES IN 1943, 1980, 2005

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

RECORDS FOR JULY 1
HIGH 98F IN 1964
LOW 44F IN 1988 [RECORD FOR MONTH] PRECIP 4.46 INS IN 1915 [RECORD FOR MONTH] PEAK GUST 52 MPH WNW IN 1974

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.49 INS IN 2021
PEAK GUST 45 MPH SW IN 1999

TODAY’S REPORT PREPARED BY: MFD