Sunday, October 12, 2025

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

SUNDAY, OCTOBER 12, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0554E
SUNSET:  1707E

COASTAL STORM APPROACHES WITH CLOUDS, INCREASING WIND, AND RAIN….

Clouds thickened early this morning with some light rain
developing during the late morning hours. An easterly wind
has been picking up as the day progresses. There is definitely
a stormy feel to the day today with plenty more to come over
the next 48 hours or so. So far 0.01″ of rain has been measured
through 1pm this afternoon.

Temperatures are on the cool side as one would expect with
an ocean flow. Readings have been held in the 50s all day,
but with the moist flow and rain, it has become quite raw
and damp out there.

As mentioned, the wind has been gradually increasing through
the day out of an easterly direction. The average speed for
the day so far is around 13mph. Gusts have been exceeding
30mph for a few hours now with a peak so far of 35mph which
occurred right around 12:30pm.

Visibility started off at around 40 miles, but has drastically
been reduced by rain and fog by late this morning and early
this afternoon. The view has dropped to generally under 15
miles or less.

The maximum temperature so far today is 56F degrees, which is
6 degrees below the normal high of 62F. The minimum temperature
since midnight is 52F degrees, which is 7 degrees above the
normal low of 45F.

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Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus, broken altocumulus/altostratus,
overcast cirrostratus, few breaks in overcast distant WNW-N
Temperature: 54F; Dew Point: 47F; Relative Humidity: 76%
Wind: E @ 15G23 kts, peak wind E 31mph at 6:33 A.M.
Sea-level pressure: 1023.7 mb; 30.23 in. Hg: falling, then rising
Visibility: 40 miles
6-hr Max temp: 54F
6-hr Min temp: 52F
24-hr Precip: 0.00 inches
BHO SA 1155 25 SCT E120 BKN 180 OVC 40 237/54/47/0815G23/023/
FEW BINOVC DSNT WNW-N PK WND 0827/33/ 8/577 53003 10054 20052

10 A.M.
Weather: Overcast stratocumulus, light rain
Temperature: 53F; Dew Point: 52F; Relative Humidity: 94%
Wind: ENE @ 12G24 kts, peak wind ENE 35mph at 9:32 A.M.
Sea-level pressure: 1024.1 mb; 30.24 in. Hg: rising, then more slowly
Visibility: 6 miles, 2 miles ESE-WSW, 10 miles WNW-N, fog
3-hr Precip: 0.01 inches
BHO SA 1455 E15 OVC 6R-F 241/53/52/0612G24/024/ L-B18E48 R-B48
VSBY 2 ESE-WSW 10 WNW-N PK WND 0630/32/ 8/5// 51004 6001/

1 P.M.
Weather: Overcast stratus, very light rain
Temperature: 55F Dew Point: 53F; Relative Humidity: 94%
Wind: ENE @ 15G27 kts, peak wind ENE 35mph at 12:30 P.M.
Sea-level pressure: 1023.0 mb; 30.21 in. Hg: rising, then falling
Visibility: 15 miles, thin fog
6-hr Max temp: 55F
6-hr Min temp: 52F
6-hr Precip: 0.01 inches
BHO SA 1755 E10 OVC 15R- 230/55/53/0615G27/021/ THN F ALQDS
R-B21 PCPN VRY LGT PK WND 0630/30/ 8/6// 55011 6001/ 10056 20052

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SUMMARY FOR SATURDAY, OCTOBER 11, 2025

TEMPERATURE (DEGREES F)
MAX…….66   NORMAL…..63
MIN…….49   NORMAL…..46
MEAN……58   NORMAL…..54

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+4
TOTAL DEPARTURE FOR THE MONTH………………………+43 [+3.7 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..7  DEPARTURE……..-4
TOTAL HEATING UNITS FOR THE MONTH…………….74  DEPARTURE…….-28
TOTAL HEATING UNITS FOR THE SEASON…………..137  DEPARTURE…….-82
TOTAL HEATING UNITS LAST SEASON TO DATE………150  DEPARTURE…….-13

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)………..21 SW   @   12:45 A.M.
VECTOR #1 (1-Sec)……….21 SW   @   12:45 A.M.
VECTOR #2 (1-Sec)……….20 SW   @   12:45 A.M.
DAVIS #1……………….21 SW   @   12:43 A.M.
DAVIS #2 ………………19 WSW  @   12:45 A.M.
RMY #1 (Instantaneous)…..20 SW   @   12:45 A.M.
RMY #2 (Instantaneous)…..19 SW   @   12:45 A.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……21 SW   @   12:45 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………15 SW   @   12:14 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 SW   @   12:47 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..14 SW   @   12:12 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………14 SW   @   12:12 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 SW   @   12:13 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 SW   @   12:13 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..14 SW   @   12:12 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………12 SW   @   12:47 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………6.8 SW [162 total miles] VECTOR #1……………….7.3
VECTOR #2……………….7.6
DAVIS #1………………..6.9 SSE
DAVIS #2………………..7.2 S
RMY #1………………….6.9 S
RMY #2………………….7.6 SSE
RICHARDS (C5C)…………..7.5

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.18
TOTAL PRECIPITATION FOR THE MONTH…………..0.80 DEPARTURE…..-1.06
TOTAL PRECIPITATION FOR THE YEAR (2025)…….36.62 DEPARTURE…..-3.91

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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 66/49/58/+4/0.00/…/..            21 SW  VEC1 21 SW  RMY 20

10/12 The low since midnight is 52F, the daily normal low is 45F.

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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 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

RECORDS FOR OCTOBER 13
HIGH 84F IN 1930,1954
LOW 29F IN 2012
PRECIP 5.87 INCHES IN 1895
SNOWFALL 4.2 INCHES IN 1934
PEAK GUST 46e MPH W IN 1950

TODAY’S REPORT PREPARED BY: Matt Douglas