Sunday, July 27, 2025
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SUNDAY, JULY 27, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0432E
SUNSET: 1909E
CLOUDS ARE DOMINATING TODAY WITH SOME RAIN SHOWERS MOVING THROUGH….
Clouds have been the theme to this point through the day with
occasional rain showers moving through starting at around 8am
this morning. Most of the showers have been on the light side
with only 0.08″ falling through 1pm.
Temperatures being held down by the clouds and rain with values
generally hanging in the mid to upper 60s. We did briefly reach
the low 70s before the rain started this morning. Of course with
the rain, the dew point has been on the rise as well from the
low 60s early this morning to the mid 60s by early this afternoon.
The wind has been mainly on the steady side out of the southwest
to south-southwest. The average speed for the day so far is
around 12mph. The peak gust so far is 29mph, which occurred
around noon-time.
Visibility has been limited today, first by the wildfire smoke
early this morning, then by the rain and fog thereafter. The
view was around 25 miles early this morning, but has been varying
between 5-15 miles since the rain started.
The maximum temperature so far today is 71F degrees, which is
11 degrees below the normal high of 82F. The minimum temperature
since midnight is 63F degrees, which is 1 degree below the
normal low of 64F.
————————————————————–
Today’s Observations:
7 A.M.
Weather: Broken altostratus/altocumulus, broken cirrostratus,
smoke layer all quadrants
Temperature: 67F; Dew Point: 61F; Relative Humidity: 80%
Wind: SSW @ 8G14 kts
Sea-level pressure: 1018.9 mb; 30.09 in. Hg: rising, then falling
Visibility: 25 miles, hazy
6-hr Max temp: 67F
6-hr Min temp: 63F
24-hr Precip: 0.00 inches
BHO SA 1155 E160 BKN 220 BKN 25 189/67/61/2108G14/009/ K LYR ALQDS
HAZY/ 8/077 58002 10067 20063
10 A.M.
Weather: Overcast nimbostratus, light rain showers
Temperature: 67F; Dew Point: 64F; Relative Humidity: 91%
Wind: SW @ 12G18 kts
Sea-level pressure: 1017.9 mb; 30.06 in. Hg: falling unsteadily
Visibility: 12 miles, 5 miles SW-N, 20 miles E-SE, thin fog
3-hr Precip: 0.01 inches
BHO SA 1455 E65 OVC 12RW- 179/67/64/2212G18/006/ THN F S-W-NE
RW-B05 VSBY 5 SW-N 20 E-SE/ 8/02/ 57010 6001/
1 P.M.
Weather: Overcast nimbostratus
Temperature: 68F Dew Point: 66F; Relative Humidity: 93%
Wind: SSW @ 13G18 kts
Sea-level pressure: 1016.3 mb; 30.01 in. Hg: falling, then more rapidly
Visibility: 15 miles, thin fog
6-hr Max temp: 71F
6-hr Min temp: 65F
6-hr Precip: 0.08 inches
BHO SA 1755 E55 OVC 15 163/68/66/1913G18/001/ THN F ALQDS RW-E47/
8/02/ 58016 6008/ 10071 20065
————————————————————–
SUMMARY FOR SATURDAY, JULY 26, 2025
TEMPERATURE (DEGREES F)
MAX…….79 NORMAL…..82
MIN…….65 NORMAL…..64
MEAN……72 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH………………………+55 [+1.9 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH……………..1 DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE SEASON…………….1 DEPARTURE……..-5
TOTAL HEATING UNITS LAST SEASON TO DATE………..0 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..7 DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH……………254 DEPARTURE…….+48
TOTAL COOLING UNITS FOR THE SEASON…………..454 DEPARTURE……+109
TOTAL COOLING UNITS LAST SEASON TO DATE………455 DEPARTURE……..-1
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)……….E25 NE @ 07:45 A.M.
VECTOR #1 (1-Sec)……….25 NE @ 07:45 A.M.
VECTOR #2 (1-Sec)……….25 NNE @ 07:45 A.M.
DAVIS #1……………….24 NE @ 07:45 A.M.
DAVIS #2 ………………23 S @ 07:44 P.M.
RMY #1 (Instantaneous)…..25 NE @ 07:24 A.M.
RMY #2 (Instantaneous)…..24 NNE @ 07:45 A.M.
MERLIN…………………24 NE
RICHARDS (C5C) (Inst)…..OTS
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SSW @ 08:00 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 @ 07:46 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 @ 07:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 NE @ 07:46 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S @ 07:45 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 NE @ 07:46 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NE @ 07:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE……..OTS
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.4 NNE [225 total miles]
VECTOR #1……………….9.5
VECTOR #2……………….9.9
DAVIS #1………………..9.6 E
DAVIS #2………………..9.7 E
RMY #1………………….9.4 ENE
RMY #2………………….9.9 ENE
RICHARDS (C5C)…………..OTS
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH…………..5.61 DEPARTURE…..+2.73
TOTAL PRECIPITATION FOR THE YEAR (2025)…….28.84 DEPARTURE…..-1.27
————————————————————–
PRELIMINARY CLIMATE SUMMARY FOR JULY 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
7/1 90/68/79/+8/0.14/411/45 38 W VEC1 38 W RMY 41 TSTM
7/2 85/69/77/+6/0.02/247/27 23 WSW VEC1 24 WSW RMY 24
7/3 88/63/76/+4/0.03/748/82 39 SW VEC1 39 SW RMY 40 TSTM
7/4 80/60/70/-2/0.00/875/96 28 NNW VEC1 27 NNW RMY 29
7/5 83/61/72/0/0.00/664/73 23 W VEC1 23 W RMY 24
7/6 92/65/79/+7/0.00/818/90 29 SW VEC1 29 SW RMY 29
7/7 88/69/79/+7/0.01/490/54 28 SSW VEC1 28 SSW RMY 29 TSTM
7/8 94/67/81/+9/0.36/562/62 24 WSW VEC1 24 WSW RMY 27 TSTM
7/9 74/65/70/-3/0.73/172/19 26 SW VEC1 27 SW RMY 28 TSTM
7/10 66/61/64/-9/3.85/000/00 24 ENE VEC1 24 ENE RMY 24 TSTM
7/11 80/62/71/-2/0.00/190/21 18 SSW VEC1 18 SSW RMY 18
7/12 84/65/75/+2/0.00/505/56 20 S VEC1 20 S RMY 19
7/13 85/63/74/+1/0.00/505/56 21 SSW VEC1 21 SSW RMY 21
7/14 81/65/73/0/T/216/24 23 SW VEC1 23 SW RMY 25
7/15 90/71/81/+8/0.06/665/74 24 SSW VEC1 24 SSW RMY 24
7/16 93/71/82/+9/0.00/690/77 24 SSW VEC1 24 SSW RMY 23
7/17 89/73/81/+8/0.00/573/64 41 WNW VEC1 41 WNW RMY 42
7/18 81/67/74/+1/0.00/786/88 36 WNW VEC1 36 WNW RMY 37
7/19 84/62/73/0/0.00/882/99 23 SW VEC1 22 SW RMY 21
7/20 85/65/75/+2/0.41/338/38 31 NW VEC1 31 NW RMY 31 TSTM
7/21 78/61/70/-3/0.00/817/92 31 NNW VEC1 31 NNW RMY 33
7/22 77/55/66/-7/0.00/816/92 20 SSE VEC1 19 SSE RMY 20
7/23 83/60/72/-1/0.00/850/96 25 SSW VEC1 25 SSW RMY 25
7/24 87/63/75/+2/0.00/…/.. 29 SSW VEC1 29 SSW RMY 30
7/25 95/69/82/+9/T/…/.. 24 WSW VEC1 24 WSW RMY 25 TSTM
7/26 79/65/72/-1/0.00/…/.. 25 NE VEC1 25 NE RMY 25
7/27 The low since midnight is 63F, the daily normal low is 64F.
————————————————————–
JULY DAILY RECORDS TO DATE
7/10 RECORD HIGHEST PRECIPITATION OF 3.85 INCHES;
BEATING OLD RECORD OF 1.95 INCHES SET IN 2015
7/16 TIED RECORD HIGH MINIMUM TEMPERATURE OF 71F;
ALSO SET IN 1901, 1958, 1968, 2013, AND 2023
————————————————————–
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR JULY 27
HIGH 95F IN 1949, 1963
LOW 50F IN 1920, 2001
PRECIP 4.01 INS IN 1979
WIND 61 MPH WNW IN 2023 [TSTM]
RECORDS FOR JULY 28
HIGH 97F IN 1931
LOW 49F IN 1903
PRECIP 3.32 INS IN 1911
PEAK GUST 62 MPH SW IN 2006
TODAY’S REPORT PREPARED BY: MFD
