Saturday, October 11, 2025

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

SATURDAY, OCTOBER 11, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0553E
SUNSET:  1708E

VARIABLE CLOUD COVER WITH WARMER TEMPERATURES AND LIGHT WIND….

Today has featured variable amounts of cloud cover, going from
overcast to clear back to overcast as the day has progressed.
The period of sunshine during the mid to late morning hours
allowed for temperatures to warm nicely making for a very
pleasant day to be outdoors.

Overnight temperatures weren’t as cold as they were the prior
night. Readings dropped into the upper 40s overnight, but have
recovered nicely to the mid 60s by early this afternoon. This
is now a bit above normal for this time of year. The dew point
has risen considerably since yesterday when values were in the
30s. Today it has risen through the 40s to near 50, as such,
the air mass isn’t as dry today.

Winds have been rather light and variable for much of the day.
The average speed for the day so far is only around 7mph. The
peak gust for the day so far has been 21mph, which occurred
during the wee hours at 12:45am.

Visibility started off at around 80 miles early this morning,
but has since dropped to around 50-60 miles as haziness has
increased with the higher dew point values.

The maximum temperature so far today is 66F degrees, which is
3 degrees above the normal high of 63F. The minimum temperature
since midnight is 49F degrees, which is 3 degrees above the
normal low of 46F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratocumulus, clearing line distant WNW-N-NE
Temperature: 53F; Dew Point: 44F; Relative Humidity: 72%
Wind: SE @ 3 kts, wind light and variable
Sea-level pressure: 1026.6 mb; 30.32 in. Hg: rising, then falling
Visibility: 80 miles
6-hr Max temp: 53F
6-hr Min temp: 49F
24-hr Precip: 0.00 inches
BHO SA 1155 E44 OVC 80 266/53/44/1303/032/ CLRG LINE DSNT
WNW-N-NE WND L/V/ 8/5// 58004 10053 20049

10 A.M.
Weather: Thin scattered cirrus, few stratocumulus distant all
quadrants, few altocumulus distant SW-WSW
Temperature: 62F; Dew Point: 50F; Relative Humidity: 63%
Wind: SSW @ 4 kts, light and variable
Sea-level pressure: 1026.2 mb; 30.30 in. Hg: falling, then more rapidly
Visibility: 50 miles
3-hr Precip: 0.00 inches
BHO SA 1455 250 -SCT 50 262/62/50/2004/030/ FEW SC DSNT ALQDS
FEW AC DSNT SW-WSW WND L/V/ 8/551 58004

1 P.M.
Weather: Overcast stratocumulus, few breaks in overcast all
quadrants
Temperature: 64F Dew Point: 49F; Relative Humidity: 57%
Wind: SW @ 3 kts, light and variable
Sea-level pressure: 1025.3 mb; 30.28 in. Hg: steady, then falling
Visibility: 60 miles
6-hr Max temp: 66F
6-hr Min temp: 53F
6-hr Precip: 0.00 inches
BHO SA 1755 E45 OVC 60 253/64/49/2303/028/ FEW BINOVC ALQDS
WND L/V/ 8/5// 58009 10066 20053

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SUMMARY FOR FRIDAY, OCTOBER 10, 2025

TEMPERATURE (DEGREES F)
MAX…….61   NORMAL…..63
MIN…….38   NORMAL…..46
MEAN……50   NORMAL…..55

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………+39 [+3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….15  DEPARTURE……..+4
TOTAL HEATING UNITS FOR THE MONTH…………….67  DEPARTURE…….-24
TOTAL HEATING UNITS FOR THE SEASON…………..130  DEPARTURE…….-78
TOTAL HEATING UNITS LAST SEASON TO DATE………139  DEPARTURE……..-9

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH…………….20  DEPARTURE…….+15
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+81
TOTAL COOLING UNITS LAST SEASON TO DATE………757  DEPARTURE……..-1

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)………..25 SSW  @   08:42 P.M.
VECTOR #1 (1-Sec)……….26 S    @   06:13 P.M.
VECTOR #2 (1-Sec)……….26 S    @   06:22 P.M.
DAVIS #1……………….28 S    @   06:21 P.M.
DAVIS #2 ………………30 S    @   05:51 P.M.
RMY #1 (Instantaneous)…..26 SSW  @   08:42 P.M.
RMY #2 (Instantaneous)…..26 S    @   06:22 P.M.
MERLIN…………………24 S
RICHARDS (C5C) (Inst)……25 SSW  @   08:42 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………19 SSW  @   08:30 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 SSW  @   06:23 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..19 S    @   06:03 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 S    @   06:23 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………22 S    @   06:03 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SSW  @   06:23 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 S    @   06:03 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 SSW  @   06:23 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………9.8 SSW [236 total miles] VECTOR #1………………10.2
VECTOR #2………………10.8
DAVIS #1……………….10.0 SSW
DAVIS #2……………….10.5 SSW
RMY #1…………………10.0 SSW
RMY #2…………………10.8 S
RICHARDS (C5C)………….10.1

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.80 DEPARTURE…..-0.88
TOTAL PRECIPITATION FOR THE YEAR (2025)…….36.62 DEPARTURE…..-3.73

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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  61/49/55/-3/0.00/668/97            30 NE  VEC1 30 NE  RMY 30
10/2  60/43/52/-6/0.00/637/91            28 NE  VEC1 28 NE  RMY 28
10/3  72/46/59/+2/0.00/670/96            23 SW  VEC1 23 SW  RMY 23
10/4  81/53/67/+10/0.00/667/96           18 NNW VEC1 18 NW  RMY 19
10/5  84/62/73/+16/0.00/664/96           18 SSW VEC1 18 SSW RMY 18
10/6  83/59/71/+15/0.00/649/94           25 SSW VEC1 25 SSW RMY 26
10/7  79/59/69/+13/0.00/440/64           35 SSW VEC1 35 SSW RMY 36
10/8  68/49/59/+4/0.80/027/04            33 NW  VEC1 34 SSW RMY 35 TSTM
10/9  55/40/48/-7/0.00/…/..            33 NNW VEC1 35 NNW RMY 35
10/10 61/38/50/-5/0.00/…/..            25 SSW VEC1 26 S   RMY 26

10/11 The low since midnight is 49F, the daily normal low is 46F.

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OCTOBER DAILY RECORDS TO DATE

10/5 HIGH MINIMUM TEMPERATURE OF 62F,
TIED THE RECORD FOR THE DATE WITH 1910

10/6 HIGH MAXIMUM TEMPERATURE OF 83F,
TIED THE RECORD FOR THE DATE WITH 1990 AND 2007

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

RECORDS FOR OCTOBER 11
HIGH 80F IN 1919,1949
LOW 28F IN 1993
PRECIP 1.36 INCHES IN 2019
SNOWFALL (NONE)
PEAK GUST 66e MPH WNW IN 1941

RECORDS FOR OCTOBER 12
HIGH 87F IN 1954
LOW 31F IN 1906
PRECIP 1.70 INCHES IN 1948
SNOWFALL TRACE IN 1904, 1941
PEAK GUST 55 MPH NW IN 1963

TODAY’S REPORT PREPARED BY: Matt Douglas