Monday, June 30, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
MONDAY, JUNE 30, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0411E
SUNSET: 1925E
SUNSHINE THROUGH THE MORNING, INCREASING HIGH CLOUDS THIS AFTERNOON;
STILL WARM AND HUMID….
The first half of the day has featured plenty of sunshine with just
a few clouds around. As we push into the afternoon hours however,
high cirrus clouds are advancing into the area and are filtering the
sun. Regardless, it’s still a rather warm and humid day out there
today.
Temperatures have warmed into the mid 80s early this afternoon. The
dew point has been in the mid to upper 60s once again today, so it
feels quite muggy out there still. With the temperature and humidity
combined, it does feel like it’s near 90, as such it’s still
recommended to use caution if doing any physical activity outdoors.
The wind has been quite light all day, as well as variable. The
average speed for the day so far is only around 5mph. The peak gust
so far is only 15mph, which occurred just after 12:30pm this
afternoon.
Visibility is decent today with around 60 miles being seen through
the morning hours, however it has slipped a bit to around 50 miles
early this afternoon as haziness increases.
The maximum temperature for today is 88F degrees, which is 8 degrees
above the normal high of 80F. The minimum temperature since midnight
is 65F degrees, which is 3 degrees above the normal low of 62F.
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Today’s Observations:
7 A.M.
Weather: Clear, few cirrus distant N-E and distant S-WSW
Temperature: 74F; Dew Point: 64F; Relative Humidity: 71%
Wind: NNW @ 2 kts, wind light
Sea-level pressure: 1018.4 mb; 30.07 in. Hg: falling, then rising
Visibility: 60 miles
6-hr Max temp: 74F
6-hr Min temp: 65F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 184/74/64/3402/007/ FEW CI DSNT N-E AND DSNT S-WSW
WND LGT/ 8/001 53010 10074 20065
10 A.M.
Weather: Scattered cumulus, scattered cirrus
Temperature: 81F; Dew Point: 67F; Relative Humidity: 61%
Wind: NNW @ 2 kts, wind light and variable
Sea-level pressure: 1017.6 mb; 30.05 in. Hg: steady, then falling
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 35 SCT 250 SCT 60 176/81/67/3302/005/ WND L/V/ 8/204 58008
1 P.M.
Weather: Broken cirrus, few cumulus all quadrants
Temperature: 86F Dew Point: 65F; Relative Humidity: 50%
Wind: SW @ 6 kts, wind light
Sea-level pressure: 1016.0 mb; 30.00 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 88F
6-hr Min temp: 74F
6-hr Precip: 0.00 inches
BHO SA 1755 E250 BKN 50 160/86/65/2306/000/ FEW CU ALQDS WND LGT/
8/204 56016 10088 20074
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SUMMARY FOR SUNDAY, JUNE 29, 2025
TEMPERATURE (DEGREES F)
MAX…….88 NORMAL…..80
MIN…….62 NORMAL…..62
MEAN……75 NORMAL…..71
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+82 [+2.6 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…….-15
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…………….10 DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE MONTH……………170 DEPARTURE…….+65
TOTAL COOLING UNITS FOR THE SEASON…………..187 DEPARTURE…….+54
TOTAL COOLING UNITS LAST SEASON TO DATE………166 DEPARTURE…….+21
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)……….E24 WNW @ 10:36 A.M.
VECTOR #1 (1-Sec)……….24 WNW @ 10:36 A.M.
VECTOR #2 (1-Sec)……….25 W @ 10:36 A.M.
DAVIS #1……………….23 W @ 10:37 A.M.
DAVIS #2 ………………24 WNW @ 10:36 A.M.
RMY #1 (Instantaneous)…..24 WNW @ 10:36 A.M.
RMY #2 (Instantaneous)…..24 W @ 10:36 A.M.
MERLIN…………………21 W
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 W @ 10:06 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 @ 10:38 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 @ 10:37 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 W @ 10:38 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………17 WNW @ 10:38 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 WNW @ 10:38 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 W @ 10:42 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.4 WNW [154 total miles]
VECTOR #1……………….7.0
VECTOR #2……………….7.1
DAVIS #1………………..6.9 W
DAVIS #2………………..6.9 WNW
RMY #1………………….6.8 W
RMY #2………………….7.1 W
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…..-3.01
TOTAL PRECIPITATION FOR THE YEAR (2025)…….23.23 DEPARTURE…..-3.87
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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 The low since midnight is 65F, 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 JUNE 30
HIGH 94F IN 1964
LOW 47F IN 1919
PRECIP 3.04 INS IN 1921
PEAK GUST 51 MPH WNW IN 1957
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
TODAY’S REPORT PREPARED BY: MFD
