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Friday, July 10, 2026

July 10, 2026

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

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

FRIDAY, JULY 10, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0417E
SUNSET:  1922E

INCREASING CLOUDS AND ANOTHER HOT SUMMER DAY ON BLUE HILL…

Another hot, summer day on the hill today, with temperatures in
the upper 80s and dew points in the upper 60s for much of the day.
Skies started at partly cloudy this morning before increasing
clouds were observed by mid morning and through the afternoon.

Temperatures overnight made it just below 70F and then were quick
to rise despite increasing cloud cover. As of 1pm, the temperature
has made it to 88F which is above normal. Dew points however, have
been trending down since this morning’s first observation. We were
at a rather soupy 71F at 7am EST and have slowly decreased to 67F
by 1pm. It hasn’t made a huge difference in the overall feel as
the wind has slowed, but visibility has slightly improved.

The wind was fairly steady overnight but has started to decrease
in intensity as the day has progressed. Winds were out of the
southwest for the early part of the day before transitioning to
a northwesterly flow by mid morning and lasting through the final
observation today. The average speed for the day so far is around
10mph. The peak gust so far for the day is 20mph, which occurred
just after midnight.

Visibility started off with a limited view of around 35 miles this
morning but improved to 50 miles by the early afternoon.

The maximum temperature so far today is 88F, which is 6 degrees
above the normal high of 82F. The minimum temperature since
midnight is 69F, which is 5 degrees above the normal low of 64F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Scattered cirrus, few stratocumulus distant SE-SSE
Temperature: 76F; Dew Point: 71F; Relative Humidity: 84%
Wind: WNW @ 8 kts
Sea-level pressure: 1008.1 mb; 29.77 in. Hg: rising, then more rapidly
Visibility: 35 miles, hazy
6-hr Max temp: 76F
6-hr Min temp: 69F
24-hr Precip: 0.00 inches
BHO SA 1155 250 SCT 35 081/76/71/3008/977/ FEW SC DSNT SE-SSE HAZY/
8/501 53007 10076 20069

10 A.M.
Weather: Broken cumulus, broken altocumulus, broken cirrus
Temperature: 83F; Dew Point: 69F; Relative Humidity: 63%
Wind: NW @ 7 kts
Sea-level pressure: 1008.6 mb; 29.78 in. Hg: steady, then rising
Visibility: 40 miles
3-hr Precip: 0.00 inches
BHO SA 1455 E40 BKN 130 BKN 250 BKN 40 086/83/69/3107/978/ 8/251 53005

1 P.M.
Weather: Scattered cumulus, scattered altocumulus, broken cirrus
Temperature: 88F; Dew Point: 67F; Relative Humidity: 50%
Wind: NW @ 7 kts
Sea-level pressure: 1008.5 mb; 29.78 in. Hg: rising, then falling
Visibility: 50 miles
6-hr Max temp: 88F
6-hr Min temp: 76F
6-hr Precip: 0.00 inches
BHO SA 1755 40 SCT 80 SCT E250 BKN 50 085/88/67/3207/978/ 8/251
58001 10088 20076
————————————————————–

SUMMARY FOR THURSDAY, JULY 9, 2026

TEMPERATURE (DEGREES F)
MAX…….91   NORMAL…..82
MIN…….65   NORMAL…..64
MEAN……78   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+5
TOTAL DEPARTURE FOR THE MONTH………………………+48 [+5.1 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 (JUL)………..2  DEPARTURE……..-1
TOTAL HEATING UNITS FOR THE SEASON…………….2  DEPARTURE……..-1
TOTAL HEATING UNITS LAST SEASON TO DATE………..1  DEPARTURE……..+1

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY…………….13  DEPARTURE……..+5
TOTAL COOLING UNITS FOR THE MONTH (JUL)………112  DEPARTURE…….+47
TOTAL COOLING UNITS FOR THE SEASON…………..351  DEPARTURE……+147
TOTAL COOLING UNITS LAST SEASON TO DATE………298  DEPARTURE…….+53

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)………..29 SW   @   09:30 P.M.
VECTOR #1 (1-Sec)……….27 SW   @   09:30 P.M.
VECTOR #2 (1-Sec)……….29 SW   @   05:11 P.M.
DAVIS #1……………….26 SW   @   05:12 P.M.
DAVIS #2 ………………27 SW   @   04:32 P.M.
RMY #1 (Instantaneous)…..29 SW   @   05:11 P.M.
RMY #2 (Instantaneous)…..29 SW   @   05:11 P.M.
MERLIN…………………26 WSW
RICHARDS (C5C) (Inst)……27 SW   @   06:05 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………20 WSW  @   04:57 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..19 WSW  @   04:57 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 SW   @   04:56 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 SW   @   04:57 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………20 WSW  @   04:57 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..19 WSW  @   04:57 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 SW   @   04:56 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………19 WSW  @   04:57 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.3 WSW [272 total miles] VECTOR #1………………11.7
VECTOR #2………………11.8
DAVIS #1……………….11.6 WSW
DAVIS #2……………….10.8 WSW
RMY #1…………………11.5 WSW
RMY #2…………………11.7 SW
RICHARDS (C5C)………….11.1

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..2.22 DEPARTURE…..+1.24
TOTAL PRECIPITATION FOR THE YEAR (2026)…….20.88 DEPARTURE…..-7.33

————————————————————–

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/…/..            23 WSW VEC1 23 SW  RMY 24
7/2  99/72/86/+15/0.04/…/..            40 W   VEC1 39 W   RMY 45 TSTM
7/3  98/77/88/+16/0.00/…/..            32 WNW VEC1 32 WNW RMY 34 TSTM
7/4  94/73/84/+12/0.01/…/..            29 WNW VEC1 29 WNW RMY 29
7/5  83/69/76/+4/T/…/..                20 SSE VEC1 20 SE  RMY 17
7/6  74/60/67/-5/0.05/…/..             24 E   VEC1 24 E   RMY 24
7/7  65/61/63/-9/2.11/…/..             40 ENE VEC1 39 NE  RMY 40
7/8  83/58/72/-1/0.01/…/..             26 N   VEC1 26 N   RMY 25
7/9  91/65/78/+5/0.00/…/..             29 SW  VEC1 27 SW  RMY 29

7/10 The low since midnight is 69F, the daily normal low is 64F.

————————————————————–

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

————————————————————–

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

RECORDS FOR JULY 10
HIGH 99F IN 1911
LOW 46F IN 1890
PRECIP 3.85 INS IN 2025
WIND 75 MPH W IN 1985

RECORDS FOR JULY 11
HIGH 98F IN 1911
LOW 49F IN 1890
PRECIP 1.87 INS IN 1959
WIND 53 MPH NW IN 1988

TODAY’S REPORT PREPARED BY: Amanda Joly

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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
Part I — Data Use Policy
§ 01

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§ 02

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§ 03

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§ 05

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Effective January 1, 2025 · Blue Hill Observatory & Science Center · Milton, Massachusetts
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