Wednesday, July 22, 2026

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

WEDNESDAY, JULY 22, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0427E
SUNSET:  1914E

BREEZY, WARM, AND HUMID TODAY WITH A MIX OF SUN AND CLOUDS….

Clouds dominated the sky first thing this morning along with a
bit of fog. This was the leftovers of the significant rainfall
we received late yesterday afternoon and evening. Showers and
thunderstorms brought 1.15″ of rain to the Hill within only a
few hours, 0.58″ of which fell in 1 hour between 4-5pm.

Clouds finally began to break by mid morning with a mix of sun
and clouds being the theme since.

Temperatures started the day on the warm side thanks to the high
humidity. Readings have reached the low 80s by early this
afternoon. Dew points have been held in the low 70s through the
day, so it feels quite muggy out there today.

Winds have been on the busy side again today, but not as windy
as yesterday. They have been out of mainly the southwest today
averaging at around 14mph for the day so far. Gusts have been
frequently exceeding 20mph throughout the day. The peak gust so
far is 29mph, which occurred just before noon-time.

Visibility has been gradually trying to improve a bit, from
around 30 miles early this morning to around 40 miles by early
this afternoon. With the high humidity, it is of course on the
hazy side.

The maximum temperature so far today is 81F, which is 1 degree
below the normal high of 82F. The minimum temperature since
midnight is 69F, which is 5 degrees above the normal low of 64F.

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, overcast altostratus, few lower
stratus fractus all quadrants
Temperature: 71F; Dew Point: 70F; Relative Humidity: 95%
Wind: SW @ 10G18 kts
Sea-level pressure: 1005.6 mb; 29.70 in. Hg: falling, then rising
Visibility: 30 miles, thin fog
6-hr Max temp: 71F
6-hr Min temp: 69F
24-hr Precip: 1.15 inches
BHO SA 1155 E14 BKN 150 OVC 30 056/71/70/2210G18/970/
FEW LWR STFRA ALQDS THN F ALQDS/ 8/52/ 53005 70115 10071 20069

10 A.M.
Weather: Broken cumulus/stratocumulus, broken altocumulus,
few lower cumulus fractus all quadrants
Temperature: 77F; Dew Point: 71F; Relative Humidity: 80%
Wind: SW @ 10G21 kts
Sea-level pressure: 1007.1 mb; 29.74 in. Hg: rising, then more rapidly
Visibility: 35 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 E20 BKN 150 BKN 35 071/77/71/2310G21/974/
FEW LWR CUFRA ALQDS HAZY/ 8/850 53015

1 P.M.
Weather: Broken cumulus
Temperature: 81F; Dew Point: 72F; Relative Humidity: 74%
Wind: SSW @ 11G20 kts
Sea-level pressure: 1007.2 mb; 29.74 in. Hg: falling, then rising
Visibility: 40 miles, hazy
6-hr Max temp: 81F
6-hr Min temp: 71F
6-hr Precip: 0.00 inches
BHO SA 1755 E35 BKN 40 072/81/72/2011G20/974/ HAZY/ 8/200 53001
10081 20071

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SUMMARY FOR TUESDAY, JULY 21, 2026

TEMPERATURE (DEGREES F)
MAX…….76   NORMAL…..82
MIN…….60   NORMAL…..64
MEAN……68   NORMAL…..73

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………+52 [+2.3 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)………..2  DEPARTURE……..-3
TOTAL HEATING UNITS FOR THE SEASON…………….2  DEPARTURE……..-3
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)………212  DEPARTURE…….+48
TOTAL COOLING UNITS FOR THE SEASON…………..451  DEPARTURE……+148
TOTAL COOLING UNITS LAST SEASON TO DATE………412  DEPARTURE…….+39

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)………..35 S    @   10:46 A.M.
VECTOR #1 (1-Sec)……….35 SSW  @   10:45 A.M.
VECTOR #2 (1-Sec)……….32 S    @   10:57 A.M.
DAVIS #1……………….34 S    @   10:44 A.M.
DAVIS #2 ………………39 S    @   10:45 A.M.
RMY #1 (Instantaneous)…..35 SSW  @   10:45 A.M.
RMY #2 (Instantaneous)…..34 SSW  @   10:58 A.M.
MERLIN…………………31 S
RICHARDS (C5C) (Inst)……33 S    @   10:46 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………23 S    @   11:05 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..23 S    @   10:46 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..25 S    @   10:46 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………23 S    @   10:46 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 S    @   10:46 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..22 S    @   10:46 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..25 S    @   10:46 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………22 S    @   10:46 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.0 S [313 total miles] VECTOR #1………………13.0
VECTOR #2………………14.1
DAVIS #1……………….12.7 S
DAVIS #2……………….14.4 S
RMY #1…………………12.8 S
RMY #2…………………14.3 S
RICHARDS (C5C)………….12.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..1.15 DEPARTURE…..+1.04
TOTAL PRECIPITATION FOR THE MONTH (JUL)……..3.60 DEPARTURE…..+1.27
TOTAL PRECIPITATION FOR THE YEAR (2026)…….22.26 DEPARTURE…..-7.30

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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 The low since midnight is 69F, 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 22
HIGH 99F IN 1926, 2011
LOW 52F IN 1890
PRECIP 1.73 INS IN 1887
PEAK GUST 55 MPH IN 1983

RECORDS FOR JULY 23
HIGH 99F IN 1952
LOW 51F IN 1923,1977
PRECIP 1.82 INS IN 1953
PEAK GUST 54e MPH S IN 1946

TODAY’S REPORT PREPARED BY: Matt Douglas