Monday, October 13, 2025

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

MONDAY, OCTOBER 13, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0555E
SUNSET:  1705E

COASTAL STORM BRINGS STEADY RAIN AND STRONG WIND GUSTS TO BLUE
HILL….

It’s stormy out there today! Rain has been falling here
steadily since late yesterday morning with 2.55″ for the event
being measured so far through 1pm today. In addition to the
rainfall, strong east-northeasterly winds have been occurring
making for a rather miserable day with a chilly windswept
rain. Definitely a perfect day for hot soup or chili!

Temperatures are on the cool side as one would expect with
an ocean flow. Readings have had very little spread today,
holding between 52F and 53F for the entire day to this point.

Winds have been very busy today out of the east-northeast.
The average speed for the day so far is around 24mph. Gusts
have been frequently exceeding 40mph today, with a peak so far
of 51mph which occurred just before 10:20am this morning. This
has beaten the previous record peak gust for the date of 46e
mph set back in 1950.

Visibility has been limited all day with the rain and fog.
It’s generally been 1.5 miles or less all day.

The maximum temperature so far today is 53F degrees, which is
9 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: Overcast stratus, light rain
Temperature: 53F; Dew Point: 53F; Relative Humidity: 100%
Wind: ENE @ 24G37 kts, peak wind ENE 48mph at 6:42 A.M.
Sea-level pressure: 1020.5 mb; 30.14 in. Hg: rising, then more rapidly
Visibility: 1.5 miles, fog
6-hr Max temp: 53F
6-hr Min temp: 52F
24-hr Precip: 1.83 inches
BHO SA 1155 E3 OVC 11/2R-F 205/53/53/0624G37/014/ PK WND 0642/42/
8/6// 53007 6072/ 70183 10053 20052

10 A.M.
Weather: Overcast stratus, stratus fractus occasionally drifting
over summit, light rain
Temperature: 52F; Dew Point: 52F; Relative Humidity: 100%
Wind: ENE @ 23G40 kts, peak wind ENE 47mph at 9:30 A.M.
Sea-level pressure: 1020.7 mb; 30.14 in. Hg: rising, then falling
Visibility: 1/2 mile, 1/8 variable 1 mile, fog
3-hr Precip: 0.32 inches
BHO SA 1455 E1 OVC 1/2VR-F 207/52/52/0623G40/014/ STFRA OCNLY
DRFTG OVR SMT VSBY 1/8V1 PK WND 0641/30/ 8/6// 50002 6032/

1 P.M.
Weather: Sky obscured, vertical visibility 200ft, rain
Temperature: 53F Dew Point: 53F; Relative Humidity: 100%
Wind: ENE @ 20G33 kts, peak wind ENE 44mph at 12:09 P.M.
Sea-level pressure: 1020.3 mb; 30.13 in. Hg: steady, then falling
Visibility: 1/4 mile, fog
6-hr Max temp: 53F
6-hr Min temp: 52F
6-hr Precip: 0.72 inches
BHO SA 1755 X W2 1/4RF 203/53/53/0620G33/013/ PK WND 0638/09/
8//// 58004 6072/ 10053 20052

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SUMMARY FOR SUNDAY, OCTOBER 12, 2025

TEMPERATURE (DEGREES F)
MAX…….56   NORMAL…..62
MIN…….52   NORMAL…..45
MEAN……54   NORMAL…..54

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………..0
TOTAL DEPARTURE FOR THE MONTH………………………+43 [+3.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….11  DEPARTURE………0
TOTAL HEATING UNITS FOR THE MONTH…………….85  DEPARTURE…….-28
TOTAL HEATING UNITS FOR THE SEASON…………..148  DEPARTURE…….-83
TOTAL HEATING UNITS LAST SEASON TO DATE………155  DEPARTURE……..-7

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)………..50 ENE  @   09:36 P.M.
VECTOR #1 (1-Sec)……….50 ENE  @   09:11 P.M.
VECTOR #2 (1-Sec)……….48 ENE  @   10:11 P.M.
DAVIS #1……………….48 ENE  @   09:36 P.M.
DAVIS #2 ………………46 ENE  @   10:11 P.M.
RMY #1 (Instantaneous)…..52 ENE  @   09:36 P.M.
RMY #2 (Instantaneous)…..51 ENE  @   09:36 P.M.
MERLIN…………………48 ENE
RICHARDS (C5C) (Inst)……48 ENE  @   09:36 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………30 ENE  @   09:32 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..29 NE   @   11:18 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..31 ENE  @   09:12 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………31 E    @   09:13 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………32 E    @   09:13 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..30 ENE  @   09:12 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..31 ENE  @   09:12 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………29 ENE  @   09:12 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..17.3 ENE [414 total miles] VECTOR #1………………15.5
VECTOR #2………………17.5
DAVIS #1……………….17.6 ENE
DAVIS #2……………….17.5 E
RMY #1…………………15.9 ENE
RMY #2…………………16.9 ENE
RICHARDS (C5C)………….16.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..1.83 DEPARTURE…..+1.66
TOTAL PRECIPITATION FOR THE MONTH…………..2.63 DEPARTURE…..+0.60
TOTAL PRECIPITATION FOR THE YEAR (2025)…….38.45 DEPARTURE…..-2.25

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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 56/52/54/0/0.91/…/..             50 ENE VEC1 50 ENE RMY 52

10/13 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 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

RECORDS FOR OCTOBER 14
HIGH 79F IN 2000
LOW 28F IN 1958
PRECIP 2.69 INCHES IN 1990
SNOWFALL 2.0 INCHES IN 1913
PEAK GUST 63e W IN 1976

TODAY’S REPORT PREPARED BY: Matt Douglas