Friday, July 24, 2026

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

FRIDAY, JULY 24, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0429E
SUNSET:  1912E

ANOTHER BEAUTIFUL SUMMERY DAY WITH LIGHTER WINDS AND A BIT
WARMER….

We have had all day sunshine today on the hill, and for most of
the region, as high pressure has been dominant for another day.
Skies have remained mostly clear with early morning cirrus offshore
followed by fair-weather cumulus appearing by the mid morning and
becoming more prevalent by the afternoon.

Temperatures overnight were in the lower 60’s before warming to
the low 80’s by the final observation. Although the dew point values
remain similar to yesterday, and only warmer by a couple of degrees,
the low wind speed and wind direction are contributing to the overall
feel of summer-like humidity.

Winds were most productive during the early hours and have since
become light and variable and at a couple times going calm. Since
shifting to a southerly direction, the air has felt more stagnant
and mild, a big difference than yesterday’s refreshing northerly
flow. The average so far today has only been around 6mph. The peak
gust so far is 15mph, which occurred just before noon today.

Visibility has hovered between 50-60 miles today, with visibility
decreasing as the day progressed.

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

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Today’s Observations:

7 A.M.
Weather: Clear, few cirrus NNE-ESE
Temperature: 67F; Dew Point: 56F; Relative Humidity: 66%
Wind: NNW @ 4 kts, wind light
Sea-level pressure: 1024.2 mb; 30.25 in. Hg: rising, then more slowly
Visibility: 60 miles
6-hr Max temp: 67F
6-hr Min temp: 61F
24-hr Precip: 0.00 inches
BHO SA 1155 CLR 60 242/67/56/3304/025/ FEW CI NNE-ESE WND LGT/
8/001 51009 10067 20061

10 A.M.
Weather: Scattered cirrus, few altocumulus E-SSE and W
Temperature: 78F; Dew Point: 54F; Relative Humidity: 44%
Wind: ESE @ 4 kts, wind light
Sea-level pressure: 1024.3 mb; 30.25 in. Hg: falling, then rising
Visibility: 60 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 60 243/78/54/1104/025/ FEW CU ALQDS WND LGT/ 8/200 53001

1 P.M.
Weather: Scattered cumulus
Temperature: 81F; Dew Point: 56F; Relative Humidity: 42%
Wind: SSW @ 5 kts, wind light and variable
Sea-level pressure: 1022.9 mb; 30.21 in. Hg: falling, then more slowly
Visibility: 50 miles
6-hr Max temp: 81F
6-hr Min temp: 67F
6-hr Precip: 0.00 inches
BHO SA 1755 50 SCT 50 229/81/56/2005/021/ WND L/V/ 8/200 56014 10082 20067

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SUMMARY FOR THURSDAY, JULY 23, 2026

TEMPERATURE (DEGREES F)
MAX…….78   NORMAL…..82
MIN…….57   NORMAL…..64
MEAN……68   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………+48 [+1.9 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……………..3  DEPARTURE……..-6
TOTAL COOLING UNITS FOR THE MONTH (JUL)………224  DEPARTURE…….+43
TOTAL COOLING UNITS FOR THE SEASON…………..463  DEPARTURE……+143
TOTAL COOLING UNITS LAST SEASON TO DATE………420  DEPARTURE…….+43

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 NNW  @   06:37 A.M.
VECTOR #1 (1-Sec)……….23 NNW  @   08:58 A.M.
VECTOR #2 (1-Sec)……….24 NW   @   06:38 A.M.
DAVIS #1……………….20 NW   @   06:37 A.M.
DAVIS #2 ………………22 N    @   06:38 A.M.
RMY #1 (Instantaneous)…..23 NNW  @   06:37 A.M.
RMY #2 (Instantaneous)…..24 NW   @   06:38 A.M.
MERLIN…………………21 N
RICHARDS (C5C) (Inst)……21 NNW  @   06:37 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 NW   @   06:39 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 NW   @   06:39 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..15 NNW  @   07:42 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………15 NW   @   06:39 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………15 NNW  @   07:42 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 NW   @   06:39 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..15 NNW  @   07:42 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 NW   @   06:39 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.2 NW [197 total miles] VECTOR #1……………….8.6
VECTOR #2……………….9.0
DAVIS #1………………..8.6 NW
DAVIS #2………………..8.7 NW
RMY #1………………….8.5 WNW
RMY #2………………….8.8 WNW
RICHARDS (C5C)…………..9.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.11
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..3.83 DEPARTURE…..+1.28
TOTAL PRECIPITATION FOR THE YEAR (2026)…….22.49 DEPARTURE…..-7.29

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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/+11/0.00/704/77            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 The low since midnight is 61F, 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 24
HIGH 99F IN 2022
LOW 49F IN 1893,1912
PRECIP 2.27 INS IN 2008
PEAK GUST 46 MPH NE IN 2009

RECORDS FOR JULY 25
HIGH 96F IN 2016
LOW 51F IN 1901,1953
PRECIP 2.25 INS IN 1990
PEAK GUST 88 MPH NW IN 1972

TODAY’S REPORT PREPARED BY: Amanda Joly