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BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
TUESDAY, JULY 28, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0433E
SUNSET: 1908E
MUCH MORE HUMID TODAY WITH MAINLY CLOUDY SKIES AND A SOUTHERLY
FLOW….
A deep southerly flow is bringing ample moisture to the region
as a slow moving trough pushes through. Due to the significant
increase in moisture, clouds have been the theme today as we
started the day with overcast skies and fog. The clouds did
break allowing for some partial sunshine. The clouds have become
quite convective as the warm moisture air from the surface rises
into the cooler air aloft associated with the trough. Showers and
thunderstorms have developed across western Southern New England,
and this trend should continue eastward as we approach the
evening hours.
Temperatures are warm, but still near seasonal levels for this
time of year. Readings have reached the low to mid 80s. What’s
making it feel worse however is the high dew point values which
have reached around 70F. As such, it feels quite muggy out there
today. This is quite a drastic change from the dry air that we
had over the weekend into yesterday.
Winds have been fairly steady through the day, generally out of
the south-southwest. The average speed for the day so far is
around 10mph. It has been a bit gusty at times, with an increasing
trend this afternoon. The peak gust for the day so far is 26mph,
which occurred just after 1pm this afternoon.
Visibility has been limited today, first due to fog this morning
which was quite dense here on the summit around sunrise. The view
improved to around 25-30 miles however once the fog burned off,
but haziness is now the main cause of the reduced visibility
early this afternoon.
The maximum temperature so far today is 84F, which is 2 degrees
above the normal high of 82F. The minimum temperature since
midnight is 65F, which is 1 degree above the normal low of 64F.
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Today’s Observations:
7 A.M.
Weather: Broken stratus fractus, overcast stratus
Temperature: 69F; Dew Point: 68F; Relative Humidity: 96%
Wind: SSW @ 6 kts, wind light
Sea-level pressure: 1009.3 mb; 29.81 in. Hg: steady, then rising
Visibility: 15 miles, thin fog
6-hr Max temp: 69F
6-hr Min temp: 65F
24-hr Precip: 0.00 inches
BHO SA 1155 E4 BKN 14 OVC 15 093/69/68/2106/981/ THN F ALQDS
WND LGT/ 8/6// 53003 10069 20065
10 A.M.
Weather: Broken cumulus, broken cirrus, moderate cumulus all quadrants
Temperature: 81F; Dew Point: 70F; Relative Humidity: 69%
Wind: S @ 7 kts
Sea-level pressure: 1008.7 mb; 29.79 in. Hg: falling, then rising
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E30 BKN 250 BKN 30 087/81/70/1907/979/ MDT CU ALQDS
HAZY/ 8/201 55006
1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus
Temperature: 82F; Dew Point: 69F; Relative Humidity: 64%
Wind: S @ 13G22 kts
Sea-level pressure: 1007.7 mb; 29.76 in. Hg: falling, then more slowly
Visibility: 25 miles, hazy
6-hr Max temp: 84F
6-hr Min temp: 69F
6-hr Precip: 0.00 inches
BHO SA 1755 E35 70 BKN BKN 250 BKN 25 077/82/69/1813G22/976/
HAZY/ 8/251 56010 10084 20069
————————————————————–
SUMMARY FOR MONDAY, JULY 27, 2026
TEMPERATURE (DEGREES F)
MAX…….83 NORMAL…..82
MIN…….54 NORMAL…..64
MEAN……69 NORMAL…..73
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4
TOTAL DEPARTURE FOR THE MONTH………………………+32 [+1.0 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH (JUL)………..2 DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE SEASON…………….2 DEPARTURE……..-4
TOTAL HEATING UNITS LAST SEASON TO DATE………..1 DEPARTURE……..+1
COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..4 DEPARTURE……..-4
TOTAL COOLING UNITS FOR THE MONTH (JUL)………240 DEPARTURE…….+25
TOTAL COOLING UNITS FOR THE SEASON…………..479 DEPARTURE……+125
TOTAL COOLING UNITS LAST SEASON TO DATE………457 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 *=Last of multiple occurrences
F420C (Official)………..18 S @ 06:49 P.M.
VECTOR #1 (1-Sec)……….18 S @ 07:31 P.M.
VECTOR #2 (1-Sec)……….19 S @ 06:54 P.M.
DAVIS #1……………….19 S @ 06:49 P.M.
DAVIS #2 ………………22 S @ 06:43 P.M.
RMY #1 (Instantaneous)…..17 S @ 06:59 P.M.
RMY #2 (Instantaneous)…..19 S @ 07:29 P.M.
MERLIN…………………17 S
RICHARDS (C5C) (Inst)……17 S @ 07:31 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 SSW @ 07:57 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 SSW @ 07:53 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 S @ 07:53 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 S @ 07:53 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 S @ 07:31 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 SSW @ 07:53 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 S @ 07:53 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………13 SSW @ 07:53 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………5.9 SE [142 total miles]
VECTOR #1……………….6.6
VECTOR #2……………….6.8
DAVIS #1………………..6.1 SE
DAVIS #2………………..5.9 SSE
RMY #1………………….6.5 E
RMY #2………………….6.7 E
RICHARDS (C5C)…………..6.8
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.12
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..3.83 DEPARTURE…..+0.83
TOTAL PRECIPITATION FOR THE YEAR (2026)…….22.49 DEPARTURE…..-7.74
————————————————————–
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 95/68/82/+11/0.00/704/77 23 WSW VEC1 23 SW RMY 24
7/2 99/72/86/+15/0.04/822/90 40 W VEC1 39 W RMY 45 TSTM
7/3 98/77/88/+16/0.00/803/88 32 WNW VEC1 32 WNW RMY 34 TSTM
7/4 94/73/84/+12/0.01/765/84 29 WNW VEC1 29 WNW RMY 29
7/5 83/69/76/+4/T/355/39 20 SSE VEC1 20 SE RMY 17
7/6 74/60/67/-5/0.05/009/01 24 E VEC1 24 E RMY 24
7/7 65/61/63/-9/2.11/000/00 40 ENE VEC1 39 NE RMY 40
7/8 83/58/72/-1/0.01/780/86 26 N VEC1 26 N RMY 25
7/9 91/65/78/+5/0.00/834/92 29 SW VEC1 27 SW RMY 29
7/10 88/69/79/+6/0.00/724/80 21 NE VEC1 21 NE RMY 23
7/11 82/66/74/+1/0.00/795/88 20 E VEC1 20 E RMY 19
7/12 81/61/71/-2/0.00/884/98 18 ENE VEC1 18 ENE RMY 18
7/13 86/62/74/+1/0.00/793/88 30 SW VEC1 30 SSW RMY 32
7/14 88/67/78/+5/0.00/540/60 32 WSW VEC1 32 WSW RMY 34
7/15 82/67/75/+2/0.00/045/05 33 WNW VEC1 33 WNW RMY 33
7/16 86/63/75/+2/0.00/797/89 33 W VEC1 34 NNW RMY 33
7/17 83/61/72/-1/0.00/823/92 28 NW VEC1 27 NW RMY 28
7/18 80/64/72/-1/0.23/268/30 41 SSW VEC1 40 SSW RMY 44 TSTM
7/19 79/63/71/-2/0.00/820/92 43 WNW VEC1 41 WNW RMY 43
7/20 83/58/71/-2/0.00/846/95 24 SSW VEC1 25 SSW RMY 24
7/21 76/60/68/-5/1.15/089/10 35 S VEC1 35 SSW RMY 35 TSTM
7/22 83/64/74/+1/0.23/…/.. 32 SSW VEC1 32 SSW RMY 33 TSTM
7/23 78/57/68/-5/0.00/…/.. 23 NNW VEC1 23 NNW RMY 23
7/24 82/61/72/-1/0.00/…/.. 26 SSE VEC1 27 SSE RMY 26
7/25 79/60/70/-3/0.00/…/.. 23 E VEC1 24 SE RMY 22
7/26 73/56/65/-8/0.00/…/.. 22 E VEC1 21 NE RMY 23
7/27 83/54/69/-4/0.00/…/.. 18 S VEC1 18 S RMY 17
7/28 The low since midnight is 65F, the daily normal low is 64F.
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JULY DAILY RECORDS TO DATE
7/2 RECORD HIGH MAXIMUM TEMPERATURE OF 99F,
BEATING THE PREVIOUS RECORD OF 95F SET IN 1963
7/2 RECORD HIGH MINIMUM TEMPERATURE OF 72F,
THIS TIED THE RECORD WITH 1901, 1913, AND 1963
7/3 RECORD HIGH MINIMUM TEMPERATURE OF 77F,
BEATING THE PREVIOUS RECORD OF 76F SET IN 2002
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
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
RECORDS FOR JULY 29
HIGH 97F IN 1949
LOW 53F IN 1888,1914
PRECIP 1.53 INS IN 1901
PEAK GUST 40e MPH E IN 1941
TODAY’S REPORT PREPARED BY: Matt Douglas
