Tuesday, October 7, 2025

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

TUESDAY, OCTOBER 7, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0548E
SUNSET:  1715E

MORNING LOW CLOUDS AND FOG GIVE WAY TO SUNSHINE; CONTINUED HUMID
WITH WELL ABOVE NORMAL TEMPERATURES FOR EARLY OCTOBER….

We started the day in the clouds with dense fog, but they burned
off rather quickly leaving us with ample sunshine. However clouds
are starting to increase this afternoon ahead of a cold front
that will pass through the region tomorrow. For now however, it
continues humid with well above normal temperatures, but no
records for today.

Temperatures have warmed quickly today from the low 60s to the
upper 70s by early this afternoon. This is still around 15
degrees above normal highs for the date. With dew point readings
into the low to mid 60s, it definitely feels quite summer-like
out there once again today.

Winds have been fairly steady and busy today. A southwest flow
has been averaging at around 13mph. Gusts have frequently been
exceeding 20mph today, with a peak gust so far of 30mph, which
occurred just before 1pm.

Visibility was reduced early this morning due to fog, down to
as low as 1/8th of a mile for a time. The view improved quickly
once the fog burned off, but due to haziness and humid air mass,
it only improved to around 30-40 miles for the balance of the day.

The maximum temperature so far today is 79F degrees, which is
15 degrees above the normal high of 64F. The minimum temperature
since midnight is 59F degrees, which is 12 degrees above the
normal low of 47F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratus
Temperature: 61F; Dew Point: 61F; Relative Humidity: 100%
Wind: SW @ 12G17 kts
Sea-level pressure: 1022.4 mb; 30.19 in. Hg: falling, then rising
Visibility: 5 miles, 3 miles SSE-SSW, fog
6-hr Max temp: 61F
6-hr Min temp: 59F
24-hr Precip: 0.00 inches
BHO SA 1155 E1 OVC 5F 224/61/61/2212G17/019/ VSBY 3 SSE-SSW/
8/6/// 53002 10061 20059

10 A.M.
Weather: Scattered stratus fractus, scattered altocumulus/castellanus,
broken cirrocumulus/cirrus
Temperature: 71F; Dew Point: 64F; Relative Humidity: 79%
Wind: SW @ 9G18 kts
Sea-level pressure: 1021.7 mb; 30.17 in. Hg: rising, then falling
Visibility: 30 miles, hazy
3-hr Precip: 0.00 inches
BHO SA 1455 14 SCT 100 SCT E220 BKN 30 217/71/64/2209G18/017/
HAZY/ 8/689 58007

1 P.M.
Weather: Broken cumulus, broken altocumulus, broken cirrocumulus,
broken cirrus
Temperature: 79F Dew Point: 63F; Relative Humidity: 58%
Wind: SW @ 14G26 kts, peak wind SSW 30mph at 12:52 P.M.
Sea-level pressure: 1019.5 mb; 30.11 in. Hg: falling, then more rapidly
Visibility: 40 miles, hazy
6-hr Max temp: 79F
6-hr Min temp: 61F
6-hr Precip: 0.00 inches
BHO SA 1755 E30 BKN 120 BKN 220 BKN 250 BKN 40 195/79/63/2214G26/011/
HAZY PK WND 2126/52/ 8/259 58022 10079 20061

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SUMMARY FOR MONDAY, OCTOBER 6, 2025

TEMPERATURE (DEGREES F)
MAX…….83R  NORMAL…..65
MIN…….59   NORMAL…..48
MEAN……71   NORMAL…..56

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL……………+15
TOTAL DEPARTURE FOR THE MONTH………………………+34 [+5.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY……………..0  DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH…………….29  DEPARTURE…….-21
TOTAL HEATING UNITS FOR THE SEASON……………92  DEPARTURE…….-76
TOTAL HEATING UNITS LAST SEASON TO DATE……….96  DEPARTURE……..-4

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..6  DEPARTURE……..+6
TOTAL COOLING UNITS FOR THE MONTH…………….16  DEPARTURE…….+13
TOTAL COOLING UNITS FOR THE SEASON…………..752  DEPARTURE…….+78
TOTAL COOLING UNITS LAST SEASON TO DATE………757  DEPARTURE……..-5

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  @   06:20 P.M.
VECTOR #1 (1-Sec)……….25 SSW  @   06:20 P.M.
VECTOR #2 (1-Sec)……….25 SSW  @   06:20 P.M.
DAVIS #1……………….26 S    @   03:30 P.M.
DAVIS #2 ………………29 S    @   05:21 P.M.
RMY #1 (Instantaneous)…..26 SSW  @   05:21 P.M.
RMY #2 (Instantaneous)…..25 SSW  @   06:20 P.M.
MERLIN…………………23 S
RICHARDS (C5C) (Inst)……25 SSW  @   05:21 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………18 SSW  @   05:38 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 SSW  @   03:31 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 SSW  @   05:14 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………18 S    @   06:06 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………19 S    @   06:14 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 SSW  @   03:31 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..19 SSW  @   05:14 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………17 SSW  @   03:31 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..11.6 SW [279 total miles] VECTOR #1………………11.8
VECTOR #2………………12.2
DAVIS #1……………….11.4 SSW
DAVIS #2……………….12.1 SW
RMY #1…………………11.7 SW
RMY #2…………………12.3 SSW
RICHARDS (C5C)………….11.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.99
TOTAL PRECIPITATION FOR THE YEAR (2025)…….35.82 DEPARTURE…..-3.84

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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/…/..            28 NE  VEC1 28 NE  RMY 28
10/3  72/46/59/+2/0.00/…/..            23 SW  VEC1 23 SW  RMY 23
10/4  81/53/67/+10/0.00/…/..           18 NNW VEC1 18 NW  RMY 19
10/5  84/62/73/+16/0.00/…/..           18 SSW VEC1 18 SSW RMY 18
10/6  83/59/71/+15/0.00/…/..           25 SSW VEC1 25 SSW RMY 26

10/7 The low since midnight is 59F, the daily normal low is 47F.

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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 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 76 W IN 2020

RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.22 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996

TODAY’S REPORT PREPARED BY: Matt Douglas