Tuesday, October 27, 2026

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

TUESDAY, OCTOBER 27, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0611E
SUNSET: 1644E

ABUNDANT SUNSHINE (THE THEME CONTINUES), BUT MUCH COOLER TODAY….

Today is yet another very nice day with plenty of sunshine, but
temperatures are much cooler following the passage of a cold
front overnight. Nonetheless, it’s still a very nice day to be
outdoors and enjoying nature!

Temperatures dropped into the low 40s early this morning as
decent cold air advection took place following the cold frontal
passage. Despite full sunshine today, readings have only slowly
risen back to the mid 50s (which is slightly below normal for
this time of year). Dew point values have been holding in the
low 30s so far today, indicating a fairly dry air mass in place.
It is also adding a bit of extra chill (or crispness) to the air
as well.

Winds were gusty overnight with the frontal passage and the cold
air advection that followed. However speeds have drastically
decreased during the daylight hours as high pressure builds over
the region. A northerly flow overnight and early this morning has
become variable as the speed drops off. The average speed for the
day so far is around 9mph, but it’s been closer to 4-5mph over
the past couple of hours. The peak gust for the day so far is
30mph, which occurred just after 12:30am this morning.

Visibility has been very good today with the view being around
70 miles all day.

The maximum temperature so far today is 55F, which is 2 degrees
below the normal high of 57F. The minimum temperature since
midnight is 42F, which is 2 degrees above the normal low of 40F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant E-SE,
few altocumulus distant all quadrants
Temperature: 44F; Dew Point: 32F; Relative Humidity: 64%
Wind: N @ 7 kts
Sea-level pressure: 1027.9 mb; 30.35 in. Hg: rising, then more slowly
Visibility: 70 miles
6-hr Max temp: 51F
6-hr Min temp: 42F
24-hr Precip: 0.00 inches
BHO SA 1155 250 -SCT 70 279/44/32/3607/035/ FEW SC DSNT E-SE
FEW AC DSNT ALQDS/ 8/551 51028 10051 20042

10 A.M.
Weather: Clear, few stratocumulus distant NE-SSE, few cirrus
distant S-WNW
Temperature: 50F; Dew Point: 32F; Relative Humidity: 49%
Wind: ENE @ 4 kts, wind light and variable
Sea-level pressure: 1029.2 mb; 30.39 in. Hg: rising, then more slowly
Visibility: 70 miles
3-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 292/50/32/0704/039/ FEW SC DSNT NE-SSE
FEW CI DSNT S-WNW WND L/V/ 8/501 51013

1 P.M.
Weather: Clear, few stratocumulus distant ESE-S
Temperature: 54F; Dew Point: 33F; Relative Humidity: 43%
Wind: NNW @ 4 kts, wind light and variable
Sea-level pressure: 1028.6 mb; 30.37 in. Hg: steady, then falling
Visibility: 70 miles
6-hr Max temp: 55F
6-hr Min temp: 44F
6-hr Precip: 0.00 inches
BHO SA 1455 CLR 70 286/54/33/3304/037/ FEW SC DSNT ESE-S
WND L/V/ 8/500 58006 10055 20044

————————————————————–

SUMMARY FOR MONDAY, OCTOBER 26, 2026

TEMPERATURE (DEGREES F)
MAX…….70 NORMAL…..57
MIN…….43 NORMAL…..40
MEAN……57 NORMAL…..49

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+8
TOTAL DEPARTURE FOR THE MONTH (OCT)…………………+43 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2026 THRU JUN 2027)
TOTAL HEATING UNITS FOR YESTERDAY……………..8 DEPARTURE……..-8
TOTAL HEATING UNITS FOR THE MONTH (OCT)………267 DEPARTURE…….-41
TOTAL HEATING UNITS FOR THE SEASON…………..388 DEPARTURE…….-38
TOTAL HEATING UNITS LAST SEASON TO DATE………323 DEPARTURE…….+65

COOLING DEGREE DAYS (SEASON: JAN 2026 THRU DEC 2026)
TOTAL COOLING UNITS FOR YESTERDAY……………..0 DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH (OCT)……….10 DEPARTURE……..+3
TOTAL COOLING UNITS FOR THE SEASON…………..815 DEPARTURE……+138
TOTAL COOLING UNITS LAST SEASON TO DATE………756 DEPARTURE…….+59

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 N @ 11:31 P.M.
VECTOR #1 (1-Sec)……….29 N @ 11:31 P.M.
VECTOR #2 (1-Sec)……….28 NNW @ 11:30 P.M.
DAVIS #1……………….27 NNW @ 11:31 P.M.
DAVIS #2 ………………24 N @ 11:31 P.M.
RMY #1 (Instantaneous)…..30 N @ 11:31 P.M.
RMY #2 (Instantaneous)…..29 NNW @ 11:30 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……27 N @ 11:31 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 N @ 11:35 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 N @ 11:32 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..17 NNW @ 11:31 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 N @ 11:33 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………16 N @ 11:41 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..17 N @ 11:33 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..17 NNW @ 11:31 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 N @ 11:33 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL…….10.5 W [252 total miles] VECTOR #1……………..10.8
VECTOR #2……………..11.1
DAVIS #1………………10.9 W
DAVIS #2…………………M
RMY #1………………..10.6 W
RMY #2………………..10.8 W
RICHARDS (C5C)…………10.8

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH (OCT)……..2.18 DEPARTURE…..-2.41
TOTAL PRECIPITATION FOR THE YEAR (2026)…….39.70 DEPARTURE…..-3.56

————————————————————–

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/+7/0.00/084/12 28 SW VEC1 28 SW RMY 27
10/2 84/63/74/+16/0.05/518/74 33 SW VEC1 33 SW RMY 32
10/3 68/51/60/+3/0.00/684/98 24 NNW VEC1 24 NNE RMY 24
10/4 63/49/56/-1/T/320/46 24 ESE VEC1 23 ESE RMY 22
10/5 69/46/58/+1/0.00/581/84 43 WNW VEC1 42 WNW RMY 43
10/6 60/41/51/-5/0.00/676/98 30 WNW VEC1 30 WNW RMY 31
10/7 65/40/53/-3/0.00/660/96 31 S VEC1 31 S RMY 31
10/8 70/53/62/+7/0.00/506/74 33 WNW VEC1 33 SSW RMY 34
10/9 66/47/57/+2/0.00/661/97 40 WNW VEC1 39 WNW RMY 40
10/10 62/44/53/-2/0.00/549/81 22 NW VEC1 22 NW RMY 23
10/11 58/48/53/-1/1.63/014/02 31 ENE VEC1 31 ENE RMY 31
10/12 68/47/58/+4/0.11/390/58 28 NE VEC1 28 NE RMY 27
10/13 59/50/55/+1/0.08/000/00 25 E VEC1 25 ENE RMY 25
10/14 77/55/66/+13/0.01/394/59 31 WNW VEC1 30 WNW RMY 31
10/15 62/49/56/+3/0.00/658/99 33 NNW VEC1 34 NNW RMY 35
10/16 65/48/57/+5/0.30/000/00 33 SSW VEC1 33 SSW RMY 34
10/17 57/34/46/-6/T/053/08 35 NW VEC1 35 NNW RMY 37
10/18 55/32/44/-8/0.00/656/100 18 SSE VEC1 18 SSE RMY 18
10/19 57/42/50/-1/0.00/633/97 20 NNE VEC1 19 NNE RMY 19
10/20 60/40/50/-1/0.00/560/86 36 NE VEC1 36 NE RMY 37
10/21 53/44/49/-2/0.00/266/41 35 NE VEC1 35 NE RMY 34
10/22 61/43/52/+2/0.00/484/75 32 NNE VEC1 32 NNE RMY 33
10/23 54/40/47/-3/0.00/642/100 29 N VEC1 29 N RMY 28
10/24 61/36/49/-1/0.00/…/.. 12 NNW VEC1 12 NNW RMY 12
10/25 66/44/55/+6/0.00/…/.. 21 WSW VEC1 20 WSW RMY 21
10/26 70/43/57/+8/0.00/…/.. 29 N VEC1 29 N RMY 30