Sunday, July 5, 2026

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

SUNDAY, JULY 5, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0414E
SUNSET:  1924E

HEATWAVE FINALLY ENDS THOUGH HAZY AND MUGGY CONDITIONS PERSIST….

Last night there was some rain in the area, though here at Blue
Hill we only received 0.01″. The rainfall here was very light
and did little to assist with dew points, though we are about
10F cooler today than we were yesterday. The reprieve isn’t
really felt as hazy skies have lingered, with the smell of
brush fire smoke and light and variable winds not giving off
much ventilation. The cooler temperatures are welcomed though,
even if it still feels muggy overall.

Overnight temperatures finally dipped into the 60’s, with a
reading of 68.9F. This is slightly above normal but is much cooler
than the 70’s we had for the past three days. We have had pretty
much all day sunshine, though clouds have filtered sun a bit during
the day, but temperatures have slowly risen to 83F so far today.
This temperature is only 2 degrees above normal so we are back in
seasonable territory. Dew points have remained in the upper 50’s
for much of the day which is improved from the 60’s and 70’s that
we have experienced over the past several days.

The wind has been light and even variable for a time during the
mid morning and early afternoon. Winds were a little more steady
during the overnight out of the east north-east but have shifted
to the southeast as of this afternoon. The average speed for the
day so far is only around 6mph. The peak gust so far for the day
is 16mph, which occurred at 4:40pm this morning.

Visibility has been limited today due to hazy conditions. We have
only had about 30 miles of visibility throughout the day.

The maximum temperature so far today is 83F, which is 2 degrees
above the normal high of 81F. The minimum temperature since
midnight is 69F, which is 6 degrees above the normal low of 63F.

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Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 73F; Dew Point: 58F; Relative Humidity: 59%
Wind: ENE @ 6 kts, wind light
Sea-level pressure: 1015.8 mb; 30.00 in. Hg: rising, then more rapidly
Visibility: 30 miles, thin fog all quadrants, smoke plume ENE
6-hr Max temp: 73F
6-hr Min temp: 69F
24-hr Precip: 0.01 inches
BHO SA 1155 150 SCT E250 BKN 30 158/73/58/0606/000/ THN F ALQDS
K PLUME ENE SUN DMLY VSBL WND LGT/ 8/051 53014 70001 10073 20069

10 A.M.
Weather: Scattered altocumulus, broken cirrus
Temperature: 79F; Dew Point: 59F; Relative Humidity: 51%
Wind: ESE @ 5 kts, wind light and variable
Sea-level pressure: 1017.3 mb; 30.04 in. Hg: rising, then more slowly
Visibility: 30 miles, hazy, smoke plume ENE
3-hr Precip: 0.00 inches
BHO SA 1455 150 SCT E250 BKN 30 173/79/59/1205/004/ K PLUME ENE
HAZY WND L/V/ 8/051 51015

1 P.M.
Weather: Scattered cumulus, scattered altocumulus, broken cirrus
Temperature: 80F; Dew Point: 60F; Relative Humidity: 49%
Wind: SE @ 4 kts, wind light and variable
Sea-level pressure: 1011.4 mb; 29.87 in. Hg: rising, then falling
Visibility: 30 miles, hazy, smoke plume ENE
6-hr Max temp: 83F
6-hr Min temp: 73F
6-hr Precip: 0.00 inches
BHO SA 1755 40 SCT 150 SCT E250 BKN 30 171/80/60/1404/003/ K PLUME
ENE HAZY WND L/V/ 8/256 58002 10083 20073

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SUMMARY FOR SATURDAY, JULY 4, 2026

TEMPERATURE (DEGREES F)
MAX…….94   NORMAL…..81
MIN…….73   NORMAL…..63
MEAN……84   NORMAL…..72

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+12
TOTAL DEPARTURE FOR THE MONTH………………………+54 [+13.3 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)………..0  DEPARTURE……..-2
TOTAL HEATING UNITS FOR THE SEASON…………….0  DEPARTURE……..-2
TOTAL HEATING UNITS LAST SEASON TO DATE………..0  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY…………….19  DEPARTURE…….+12
TOTAL COOLING UNITS FOR THE MONTH (JUL)……….80  DEPARTURE…….+53
TOTAL COOLING UNITS FOR THE SEASON…………..319  DEPARTURE……+153
TOTAL COOLING UNITS LAST SEASON TO DATE………242  DEPARTURE…….+77

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 WNW  @   02:54 P.M.
VECTOR #1 (1-Sec)……….29 WNW  @   02:54 P.M.
VECTOR #2 (1-Sec)……….30 WNW  @   02:54 A.M.
DAVIS #1……………….29 W    @   12:45 P.M.
DAVIS #2 ………………28 W    @   02:54 P.M.
RMY #1 (Instantaneous)…..29 WNW  @   02:54 P.M.
RMY #2 (Instantaneous)…..30 WNW  @   02:54 P.M.
MERLIN…………………27 W
RICHARDS (C5C) (Inst)……28 WNW  @   02:54 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 WNW  @   02:55 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 WNW  @   02:55 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..22 WNW  @   02:55 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 W    @   02:56 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 WNW  @   02:55 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 WNW  @   02:56 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..21 WNW  @   02:55 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 WNW  @   02:56 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.3 WNW [223 total miles] VECTOR #1……………….9.7
VECTOR #2………………10.4
DAVIS #1………………..9.8 WNW
DAVIS #2………………..9.4 NW
RMY #1………………….9.4 WNW
RMY #2…………………10.2 WNW
RICHARDS (C5C)…………..9.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.01 DEPARTURE…..-0.10
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..0.05 DEPARTURE…..-0.40
TOTAL PRECIPITATION FOR THE YEAR (2026)…….18.71 DEPARTURE…..-8.97

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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 The low since midnight is 69F, the daily normal low is 63F.

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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 5
HIGH 98F IN 1911
LOW 48F IN 1920, 1927 & 1979
PRECIP 1.45 INS IN 1922
PEAK GUST 49e N IN 1944

RECORDS FOR JULY 6
HIGH 99F IN 2010
LOW 47F IN 1979
PRECIP 1.43 INS IN 2005
PEAK GUST 56e MPH NNW IN 1942, 56 MPH WNW IN 1999

TODAY’S REPORT PREPARED BY: Amanda Joly