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Tuesday, August 4, 2026

August 4, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA TUESDAY, AUGUST 4, 2026 ALL TIMES ARE…

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

TUESDAY, AUGUST 4, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0440E
SUNSET:  1900E

ABUNDANT SUNSHINE WITH DRIER AIR AND WARM TEMPERATURES….

The frontal system that brought 0.70″ of rain to Blue Hill
yesterday pushed well out of sea overnight leaving us with a
very nice day today. Plenty of sunshine has been observed
with only some lingering cirrus cloud across the southern
sky, and a few cumulus off the west and northwest. With less
humid air and a bit of a breeze, it has felt rather nice
out there despite the warmer temperatures.

Temperatures cooled to the low 60s early this morning, but
quickly rebounded to the mid 80s this afternoon. As mentioned,
humidity levels are much more tolerable today than yesterday
despite the dew point still being in the low 60s. It’s pretty
amazing how things can be quite relative.

Winds have been considerably lighter than yesterday, but still
enough to offer a bit of a cooling feel to the air thanks to
the lower dew point. A generally westerly wind today has been
averaging at around 9mph for the day so far. The wind was
gusiest during the overnight to very early this morning. The
peak gust for the day is 18mph which occurred just after 5am
this morning.

Visibility has been excellent today, especially for this time
of year. The view has been around 60 miles all day!

The maximum temperature so far today is 85F, which is 3 degrees
above the normal high of 82F. The minimum temperature since
midnight is 61F, which is 3 degrees below the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered cirrus
Temperature: 68F; Dew Point: 63F; Relative Humidity: 85%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1019.0 mb; 30.09 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 68F
6-hr Min temp: 61F
24-hr Precip: 0.70 inches
BHO SA 1155 250 SCT 60 190/68/63/2806/009/ WND LGT/
8/001 51022 70070 10068 20061

10 A.M.
Weather: Clear, few cumulus distant SW-NNW, few cirrus distant
E-S-SW
Temperature: 79F; Dew Point: 61F; Relative Humidity: 53%
Wind: W @ 7 kts
Sea-level pressure: 1020.1 mb; 30.12 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 60 201/79/61/2807/012/ FEW CU DSNT SW-NNW
FEW CI DSNT E-S-SW/ 8/201 51011

1 P.M.
Weather: Scattered cirrus, few cumulus distant WSW-W and distant NW-N
Temperature: 84F; Dew Point: 62F; Relative Humidity: 48%
Wind: W @ 6 kts, wind light
Sea-level pressure: 1019.7 mb; 30.11 in. Hg: rising, then falling
Visibility: 60 miles
6-hr Max temp: 84F
6-hr Min temp: 68F
6-hr Precip: 0.00 inches
BHO SA 1755 250 SCT 60 197/84/62/2706/011/ FEW CU DSNT WSW-W
AND DSNT NW-N WND LGT/ 8/201 58004 10084 20068

————————————————————–

SUMMARY FOR MONDAY, AUGUST 3, 2026

TEMPERATURE (DEGREES F)
MAX…….76   NORMAL…..82
MIN…….65   NORMAL…..64
MEAN……71   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-2
TOTAL DEPARTURE FOR THE MONTH……………………….+4 [+1.1 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 (AUG)………..0  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………….2  DEPARTURE……..-6
TOTAL HEATING UNITS LAST SEASON TO DATE………..2  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..6  DEPARTURE……..-2
TOTAL COOLING UNITS FOR THE MONTH (AUG)……….28  DEPARTURE……..+4
TOTAL COOLING UNITS FOR THE SEASON…………..525  DEPARTURE……+114
TOTAL COOLING UNITS LAST SEASON TO DATE………517  DEPARTURE……..+8

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)………..44 SSW  @   07:45 A.M.
VECTOR #1 (1-Sec)……….44 SSW  @   07:45 A.M.
VECTOR #2 (1-Sec)……….44 S    @   08:13 A.M.
DAVIS #1……………….47 S    @   01:38 P.M.
DAVIS #2 ………………55 S    @   07:55 A.M.
RMY #1 (Instantaneous)…..45 SSW  @   07:45 A.M.
RMY #2 (Instantaneous)…..47 S    @   08:16 A.M.
MERLIN…………………39 SSW
RICHARDS (C5C) (Inst)……41 SSW  @   01:38 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………31 SSW  @   07:46 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29 SSW  @   07:46 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..32 S    @   07:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………30 S    @   07:46 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………35 S    @   07:46 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..29 SSW  @   07:46 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 S    @   07:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………28 SSW  @   07:46 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..17.1 SSW [410 total miles] VECTOR #1………………16.7
VECTOR #2………………18.0
DAVIS #1……………….17.4 SSW
DAVIS #2……………….18.6 SSW
RMY #1…………………16.4 SW
RMY #2…………………18.0 SSW
RICHARDS (C5C)………….15.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.70 DEPARTURE…..+0.57
TOTAL PRECIPITATION FOR THE MONTH (AUG)……..0.71 DEPARTURE…..+0.32
TOTAL PRECIPITATION FOR THE YEAR (2026)…….24.81 DEPARTURE…..-6.28

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR AUGUST 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

8/1  87/64/76/+3/0.00/…/..             23 SSW VEC1 24 S   RMY 24
8/2  83/68/76/+3/0.01/…/..             29 S   VEC1 28 S   RMY 30
8/3  76/65/71/-2/0.70/…/..             44 SSW VEC1 44 SSW RMY 45 TSTM

8/4 The low since midnight is 61F, the daily normal low is 64F.

————————————————————–

AUGUST DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR AUGUST 4
HIGH 96F IN 2022
LOW 48F IN 1900
PRECIP 1.68 INS IN 1983
PEAK GUST 67 MPH SSE IN 2020 [POST-TROPICAL STORM ISAIAS]

RECORDS FOR AUGUST 5
HIGH 98F IN 1955
LOW 48F IN 1929,1972
PRECIP 2.97 INCHES IN 1893
PEAK GUST 60e MPH SW 1977

TODAY’S REPORT PREPARED BY: Matt Douglas

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Blue Hill Observatory & Science Center · Legal

Data Use & Privacy Policy

Please read the full Policy before accessing Observatory data · Effective January 1, 2025

Notice: By accessing, downloading, or using any Blue Hill Observatory data or services, you unconditionally accept and agree to be bound by this Policy in its entirety. If you do not agree, you may not access or use Observatory data.
Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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