Thursday, July 2, 2026

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

THURSDAY, JULY 2, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0412E
SUNSET:  1925E

THE HEAT-WAVE CONTINUES, VERY HOT AND HUMID CONDITIONS TODAY….

Day 2 of our multi-day heat-wave is in progress. After a few
clouds moved out early this morning (following some showers
and thunderstorms overnight), the skies have been clear for
the remainder of the day so far. With a very warm air mass
overhead, thanks to a large ridge over the eastern U.S.,
temperatures have had no problem skyrocketing well into
record territory by early this afternoon.

The temperature bottomed out at 72F degrees early this morning,
which tied the record high minimum for the date with 1901, 1913,
and 1968. Readings quickly ramped up through the morning,
reaching the upper 90s (97F so far) by the 1pm observation. We
exceeded the previous record high for the day of 95F (1963) by
11:30am this morning. It would appear we could make a run at
100F degrees today, which would only be the 2nd time on record
that has occurred in the month of July. The only occurrence so
far was in 1977. Reaching 100F would also only be 1 degree shy
of tying our all-time station record of 101F which was set on
two occasions, in August of both 1949 and 1975. We’ll have a
full recap on any and all record temperatures for today in a
Special Report tomorrow morning, so stay tuned!

To make matters much worse, the dew point has been holding
in the low 70s. This is helping to create heat index values
between 105-110F, which is pretty extreme for this area.

The wind has been fairly steady today, generally out of a
westerly direction (which is the perfect direction for high
heat in this area). The average speed for the day so far is
around 11mph. The peak gust, which occurred just after 12:15am
this morning during a thunderstorm, is 40mph.

Visibility has once again been limited today due to haziness.
The view has been holding between 30-35 miles through the day.

The maximum temperature so far today is 97F, which is 17 degrees
above the normal high of 80F. The minimum temperature since
midnight is 72F, which is 10 degrees above the normal low of 62F.

As we close out June, we have some stats provided by our Chief
Scientist Mike Iacono. June 2026 came in as the 2nd warmest
June on record. Also, the November-June precipitation was the
6th driest on record. The full rankings are provided below.

BHO Highest June Mean Temperature, deg F (1885-2026):

1) 70.0 in 2021
2) 69.7 in 2026
3) 68.7 in 1999
4) 68.5 in 2001
5) 68.4 in 2024
6) 68.3 in 1925
68.3 in 1930
8) 68.2 in 1994
9) 68.1 in 2025
10) 68.0 in 1943

BHO Lowest November-June Precipitation, inches (1886-2026):

1) 20.84 in 1980-1981
2) 21.81 in 1893-1894
3) 22.23 in 1984-1985
4) 22.86 in 1965-1966
5) 23.11 in 1943-1944
6) 23.54 in 2025 2026
7) 23.68 in 1931-1932
8) 23.93 in 1964-1965
9) 24.00 in 1917-1918
10) 24.35 in 1904-1905

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PRELIMINARY STATS FOR JUNE 2026

TEMPERATURE, Deg. F
Avg. Max. 80.8 [+5.4] Avg. Min. 59.5 [+1.9] Mean      70.2 [+3.7] 24-hour corrected mean: 69.7
Max. for month: 91F on the 12th
Min. for month: 45F on the 1st, 2nd

HEATING DEGREE DAYS
Total heating units:     17 [-049] Total for the season:  6084 [-126] Total for last season: 5665

COOLING DEGREE DAYS
Total cooling units:    180 [+069] Total for the season:   239 [+100] Total for last season:  200

PRECIPITATION, Inches
Total: 1.86 [-2.77] Greatest in 24 hrs: 0.68 on the 22nd-23rd

SNOWFALL, Inches
Total:  0.0 [ 0.0] Greatest in 24 hrs: N/A

WIND, mph
Avg. uncorrected wind speed:  9.6 mph
Avg. corrected wind speed:   10.2 mph
Prevailing wind direction:   West-Northwest [16%] Peak gust and direction:     51 S on the 18th

SUNSHINE:
Campbell-Stokes card minutes: 18132 of a possible 26376, or 69%
Astronomical total minutes: 18852 of a possible 27418 or 69%

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Today’s Observations:

7 A.M.
Weather: Thin broken cirrus, cumulonimbus distant S, few altocumulus
distant WNW-NW
Temperature: 79F; Dew Point: 71F; Relative Humidity: 76%
Wind: W @ 9 kts
Sea-level pressure: 1014.6 mb; 29.96 in. Hg: rising, then falling
Visibility: 35 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 72F
24-hr Precip: 0.04 inches
BHO SA 1155 E250 -BKN 35 146/79/71/2609/996/ CB DSNT S
FEW AC DSNT WNW-NW HAZY/ 8/351 50005 6000/ 70004 10079 20072

10 A.M.
Weather: Clear, few altocumulus distant N-ESE, few cirrus distant
ESE-SSW
Temperature: 91F; Dew Point: 71F; Relative Humidity: 52%
Heat Index: 98F
Wind: WNW @ 8 kts
Sea-level pressure: 1014.7 mb; 29.96 in. Hg: rising, then steady
Visibility: 35 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 35 147/91/71/3008/996/ FEW AC DSNT N-ESE
FEW CI DSNT ESE-SSW HAZY HX 98/ 8/053 51001

1 P.M.
Weather: Clear, few small cumulus
Temperature: 97F; Dew Point: 71F; Relative Humidity: 43%
Heat Index 105F
Wind: W @ 9G16 kts
Sea-level pressure: 1014.2 mb; 29.95 in. Hg: rising, then falling
Visibility: 30 miles, hazy
6-hr Max temp: 97F
6-hr Min temp: 79F
6-hr Precip: 0.00 inches
BHO SA 1755 CLR 30 142/97/71/2809G16/995/ FEW SML CU ALQDS
HAZY HX 105/ 8/100 58005 10097 20079

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SUMMARY FOR WEDNESDAY, JULY 1, 2026

TEMPERATURE (DEGREES F)
MAX…….95   NORMAL…..80
MIN…….68   NORMAL…..62
MEAN……82   NORMAL…..71

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+11
TOTAL DEPARTURE FOR THE MONTH………………………+11 [+10.8 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………0
TOTAL HEATING UNITS FOR THE SEASON…………….0  DEPARTURE………0
TOTAL HEATING UNITS LAST SEASON TO DATE………..0  DEPARTURE………0

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY…………….17  DEPARTURE…….+10
TOTAL COOLING UNITS FOR THE MONTH (JUL)……….17  DEPARTURE…….+10
TOTAL COOLING UNITS FOR THE SEASON…………..256  DEPARTURE……+110
TOTAL COOLING UNITS LAST SEASON TO DATE………214  DEPARTURE…….+42

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)………..23 WSW  @   08:54 A.M.
VECTOR #1 (1-Sec)……….23 SW   @   01:56 A.M.
VECTOR #2 (1-Sec)……….24 SW   @   01:57 A.M.
DAVIS #1……………….23 SW   @   02:15 A.M.
DAVIS #2 ………………23 SW   @   02:15 A.M.
RMY #1 (Instantaneous)…..24 SW   @   02:17 A.M.
RMY #2 (Instantaneous)…..24 SW   @   01:57 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……23 SW   @   02:43 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 SW   @   02:45 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..17 SW   @   02:16 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 SW   @   02:16 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………17 SSW  @   02:16 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 S    @   04:25 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 SW   @   02:25 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 SW   @   02:16 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 SW   @   02:19 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.0 SW [240 total miles] VECTOR #1………………10.6
VECTOR #2………………10.9
DAVIS #1……………….10.2 SW
DAVIS #2……………….10.8 SW
RMY #1…………………10.4 SW
RMY #2…………………10.9 SW
RICHARDS (C5C)………….10.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.04 DEPARTURE…..-0.08
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..0.04 DEPARTURE…..-0.08
TOTAL PRECIPITATION FOR THE YEAR (2026)…….18.70 DEPARTURE…..-8.65

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PRELIMINARY CLIMATE SUMMARY FOR JUNE 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

6/1  60/45/53/-9/T/606/67                26 ENE VEC1 27 ENE RMY 27
6/2  75/45/60/-2/0.00/680/75             22 NNW VEC1 22 NNW RMY 21
6/3  82/56/69/+7/0.00/880/97             28 S   VEC1 28 S   RMY 29
6/4  88/57/73/+10/0.00/817/90            23 WNW VEC1 23 SW  RMY 23
6/5  87/60/74/+11/0.00/810/89            20 NW  VEC1 19 NW  RMY 21
6/6  86/64/75/+12/0.09/282/31            46 WSW VEC1 45 WSW RMY 48 TSTM
6/7  78/55/67/+3/0.26/446/49             38 NE  VEC1 38 NE  RMY 42 TSTM
6/8  77/52/65/+1/0.00/904/99             20 SW  VEC1 20 SW  RMY 21
6/9  83/56/70/+6/0.00/886/97             28 W   VEC1 27 W   RMY 30
6/10 88/59/74/+9/0.00/686/75             30 SSW VEC1 30 SSW RMY 30
6/11 90/64/77/+12/0.10/631/69            22 WNW VEC1 22 WNW RMY 23
6/12 91/74/83/+18/0.00/412/45            21 WNW VEC1 21 WNW RMY 22
6/13 87/68/78/+12/0.00/769/84            36 NW  VEC1 36 NW  RMY 38
6/14 88/65/77/+11/0.00/495/54            33 SSW VEC1 32 SSW RMY 34
6/15 82/61/72/+6/0.00/577/63             28 SSW VEC1 28 SSW RMY 28
6/16 77/54/66/-1/0.00/898/98             22 W   VEC1 22 W   RMY 22
6/17 80/57/69/+2/0.00/697/76             25 SSW VEC1 24 SSW RMY 26
6/18 76/60/68/+1/0.64/193/21             51 S   VEC1 52 SSW RMY 54
6/19 78/60/69/+1/0.00/880/96             41 W   VEC1 40 W   RMY 41
6/20 77/60/69/+1/0.00/807/88             40 WNW VEC1 39 WNW RMY 40 TSTM
6/21 82/58/70/+2/0.00/853/93             24 WNW VEC1 24 NW  RMY 25
6/22 77/60/69/0/0.39/266/29              31 SSE VEC1 31 SSE RMY 31
6/23 68/62/65/-4/0.30/000/00             28 S   VEC1 28 S   RMY 28
6/24 81/59/70/+1/0.00/816/89             28 W   VEC1 27 W   RMY 27
6/25 82/60/71/+1/0.00/879/96             20 WNW VEC1 20 SSW RMY 20
6/26 76/63/70/0/0.06/211/23              23 SSW VEC1 23 SSW RMY 23
6/27 78/63/71/+1/0.01/669/73             17 ENE VEC1 17 NE  RMY 18
6/28 79/61/70/0/T/439/48                 16 SSW VEC1 16 SSW RMY 17
6/29 82/62/72/+1/0.00/796/87             18 W   VEC1 19 WNW RMY 20
6/30 88/65/77/+6/T/567/62                32 SSW VEC1 32 SSW RMY 33

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JUNE DAILY RECORDS TO DATE

6/12 NEW RECORD HIGH MINIMUM TEMPERATURE OF 74F;
BEATING OLD RECORD OF 69F SET IN 1942 AND 2017

6/18 RECORD PEAK WIND GUST OF 51 MPH,
BEATING THE OLD RECORD OF 48e MPH SET IN 1943

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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 The low since midnight is 72F, the daily normal low is 62F.

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JULY DAILY RECORDS TO DATE

NONE.

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

RECORDS FOR JULY 2
HIGH 95F IN 1963
LOW 47F IN 1988
PRECIP 1.49 INS IN 2021
PEAK GUST 45 MPH SW IN 1999

RECORDS FOR JULY 3
HIGH 99F IN 1911
LOW 47F IN 1914
PRECIP 1.98 IN 2021
PEAK GUST 52 MPH NW IN 1963

RECORDS FOR JULY 4
HIGH 99F IN 1911
LOW 48F IN 1914
PRECIP 2.48 IN 2014
PEAK GUST 50e MPH WNW IN 1949

TODAY’S REPORT PREPARED BY: Matt Douglas