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Monday, October 5, 2026

October 5, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, OCTOBER 5, 2026 ALL TIMES ARE…

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

MONDAY, OCTOBER 5, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0546E
SUNSET:  1719E

DECENT WEATHER DAY WITH A DRY COLD FRONT PASSING THROUGH….

Skies started the day on the overcast side with some fog around
as well. The clouds broke fairly quickly revealing a mostly
sunny day. Some diurnal cumulus clouds did pop up ahead of a
cold front that passed through right around 1pm. Since the
frontal passage, the wind has picked up considerably along with
a rather sharp drop in the dew point.

Temperatures warmed to the upper 60s prior to the front pushing
through, since then readings have scaled back a bit to the mid
60s. The biggest difference so far is in the dew point, which
spent the morning and early afternoon hours in the mid 50s,
then dropped to the low to mid 40s after the 1pm observation.

Winds were mainly light through the morning hours, but as
mentioned above have picked up considerably this afternoon. The
direction has been mainly out of the west to west-northwest most
of the day so far. The average speed for the day to this point
is around 9mph, but the trend is increasing. The peak gust so
far for the day is 39mph, which occurred just after 2:20pm.

Visibility started off at only around 15-20 miles due to
lingering thin fog, but gradually improved to 70 miles by early
this afternoon.

The maximum temperature so far today is 69F, which is 4 degrees
above the normal high of 65F. The minimum temperature since
midnight is 53F, which is 8 degrees above the normal low of 48F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, few breaks in overcast all quadrants
Temperature: 55F; Dew Point: 53F; Relative Humidity: 93%
Wind: W @ 4 kts, wind light
Sea-level pressure: 1013.7 mb; 29.94 in. Hg: falling, then rising
Visibility: 20 miles, thin fog
6-hr Max temp: 55F
6-hr Min temp: 53F
24-hr Precip: Trace
BHO SA 1155 E6 OVC 20 137/55/53/2804/994/ FEW BINOVC ALQDS
THN F ALQDS WND LGT/ 8/5// 55008 70000 10055 20053

10 A.M.
Weather: Clear, few stratocumulus distant SW-NW, few altocumulus
distant WSW-NNW, few cirrus distant E-S-SW
Temperature: 64F; Dew Point: 53F; Relative Humidity: 68%
Wind: WSW @ 5 kts, wind light
Sea-level pressure: 1012.1 mb; 29.89 in. Hg: falling, then more rapidly
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 50 121/64/53/2505/989/ FEW SC DSNT SW-NW
FEW AC DSNT WSW-NNW FEW CI DSNT E-S-SW WND LGT/ 8/551 58016

1 P.M.
Weather: Broken cumulus, broken cirrus
Temperature: 66F; Dew Point: 51F; Relative Humidity: 59%
Wind: WNW @ 12G23 kts, peak wind W 30mph at 12:04 P.M.
Sea-level pressure: 1010.2 mb; 29.83 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 69F
6-hr Min temp: 55F
6-hr Precip: 0.00 inches
BHO SA 1755 E50 BKN 250 BKN 70 102/66/51/3012G23/983/
PK WND 2826/04/ 8/201 56019 10069 20055

————————————————————–

SUMMARY FOR SUNDAY, OCTOBER 4, 2026

TEMPERATURE (DEGREES F)
MAX…….63   NORMAL…..66
MIN…….49   NORMAL…..49
MEAN……56   NORMAL…..57

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH (OCT)…………………+25 [+6.1 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..9  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH (OCT)……….14  DEPARTURE…….-18
TOTAL HEATING UNITS FOR THE SEASON…………..135  DEPARTURE…….-15
TOTAL HEATING UNITS LAST SEASON TO DATE……….92  DEPARTURE…….+43

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-1
TOTAL COOLING UNITS FOR THE MONTH (OCT)………..9  DEPARTURE……..+7
TOTAL COOLING UNITS FOR THE SEASON…………..814  DEPARTURE……+141
TOTAL COOLING UNITS LAST SEASON TO DATE………738  DEPARTURE…….+76

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)………..24 ESE  @   09:00 A.M.
VECTOR #1 (1-Sec)……….23 ESE  @   09:00 A.M.
VECTOR #2 (1-Sec)……….26 E    @   09:41 A.M.
DAVIS #1……………….23 ESE  @   09:00 A.M.
DAVIS #2 ………………22 ESE  @   09:58 A.M.
RMY #1 (Instantaneous)…..22 ESE  @   08:35 A.M.
RMY #2 (Instantaneous)…..27 E    @   09:41 A.M.
MERLIN…………………21 ESE
RICHARDS (C5C) (Inst)……22 ESE  @   09:00 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………16 ESE  @   08:58 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..16 ESE  @   08:36 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 ENE  @   07:57 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………16 E    @   09:01 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 E    @   07:58 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..16 ESE  @   08:36 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 ENE  @   07:57 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………16 ESE  @   08:36 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..7.3 NE [175 total miles] VECTOR #1………………8.3
VECTOR #2………………9.0
DAVIS #1……………….8.8 ENE
DAVIS #2…………………M
RMY #1…………………8.6 ENE
RMY #2…………………8.8 ENE
RICHARDS (C5C)………….8.9

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH (OCT)……..0.05 DEPARTURE…..-0.61
TOTAL PRECIPITATION FOR THE YEAR (2026)…….37.57 DEPARTURE…..-1.76

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 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

10/1  74/56/65/+7/0.00/…/..             28 SW  VEC1 28 SW  RMY 27
10/2  84/63/74/+16/0.05/…/..            33 SW  VEC1 33 SW  RMY 32
10/3  68/51/60/+3/0.00/…/..             24 NNW VEC1 24 NNE RMY 24
10/4  63/49/56/-1/T/…/..                24 ESE VEC1 23 ESE RMY 22

10/5 The low since midnight is 53F, the daily normal low is 48F.

————————————————————–

OCTOBER DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR OCTOBER 5
HIGH 86F IN 2007
LOW 29F IN 1965
PRECIP 3.17 INCHES IN 1962
PEAK GUST 64e MPH S IN 1979

RECORDS FOR OCTOBER 6
HIGH 83F IN 1990, 2007, 2025
LOW 26F IN 1965
PRECIP 3.78 INCHES IN 1962
PEAK GUST 60e MPH S IN 1942

TODAY’S REPORT PREPARED BY: Matt Douglas

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