Tuesday, November 18, 2025

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

TUESDAY, NOVEMBER 18, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0639E
SUNSET:  1619E

ABUNDANT SUNSHINE TODAY WITH A BIT MILDER TEMPERATURES AND
A BIT LESS WIND….

It’s not a bad day today at all thanks to plenty of bright
sunshine, moderate temperatures, and a lessening wind.

Temperatures started the day in the low 30s and have recovered
nicely to the mid 40s by early this afternoon. While it’s still
below normal for the date, it does represent a few degrees
rise from yesterday’s readings. Dew point values have been
holding in the mid 20s today, which is still indicative of a
polar air mass over the region.

The wind continues to be busy, but much less so than the past
2 days. A west-northwesterly wind has been averaging at around
15mph for the day so far. While still gusty, it’s not nearly
as strong as yesterday. The peak gust so far today is 32mph,
which occurred just before 2:45am this morning.

Visibility has been decent today, starting at around 50 miles
early this morning, then increasing to around 70 miles by
late this morning.

The maximum temperature so far today is 46F degrees, which is
3 degrees below the normal high of 49F. The minimum temperature
since midnight is 31F degrees, which is 2 degrees below the
normal low of 33F.

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Today’s Observations:

7 A.M.
Weather: Clear, few stratocumulus distant all quadrants,
few altocumulus distant N-E
Temperature: 33F; Dew Point: 25F; Relative Humidity: 71%
Wind: WNW @ 14G19 kts
Sea-level pressure: 1016.2 mb; 30.01 in. Hg: rising, then more rapidly
Visibility: 50 miles
6-hr Max temp: 33F
6-hr Min temp: 31F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
BHO SA 1155 CLR 50 162/33/25/2914G19/001/ FEW SC DSNT ALQDS
FEW AC DSNT N-E/ 8/550 53026 10033 20031

10 A.M.
Weather: Clear, few stratocumulus distant all quadrants
Temperature: 40F; Dew Point: 26F; Relative Humidity: 56%
Wind: WNW @ 14G23 kts, peak wind W 30mph at 9:04 A.M.
Sea-level pressure: 1017.7 mb; 30.05 in. Hg: rising, then more slowly
Visibility: 60 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 CLR 60 177/40/26/2914G23/005/ FEW SC DSNT ALQDS
PK WND 2826/04/ 8/500 51015

1 P.M.
Weather: Clear, few stratocumulus distant all quadrants,
few cirrus distant S-W
Temperature: 45F Dew Point: 27F; Relative Humidity: 48%
Wind: WNW @ 16G22 kts
Sea-level pressure: 1016.8 mb; 30.03 in. Hg: falling, then more slowly
Visibility: 70 miles
6-hr Max temp: 46F
6-hr Min temp: 33F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
BHO SA 1755 CLR 70 168/45/27/2916G22/003/ FEW SC DSNT ALQDS
FEW CI DSNT S-W/ 8/501 56009 10046 20033

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SUMMARY FOR MONDAY, NOVEMBER 17, 2025

TEMPERATURE (DEGREES F)
MAX…….41   NORMAL…..50
MIN…….29   NORMAL…..33
MEAN……35   NORMAL…..41

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-6
TOTAL DEPARTURE FOR THE MONTH………………………-17 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….30  DEPARTURE……..+6
TOTAL HEATING UNITS FOR THE MONTH……………371  DEPARTURE…….+16
TOTAL HEATING UNITS FOR THE SEASON…………..782  DEPARTURE…….-85
TOTAL HEATING UNITS LAST SEASON TO DATE………649  DEPARTURE……+133

COOLING DEGREE DAYS (SEASON JAN 2025 THRU DEC 2025)
TOTAL COOLING UNITS FOR YESTERDAY……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE MONTH……………..0  DEPARTURE………0
TOTAL COOLING UNITS FOR THE SEASON…………..756  DEPARTURE…….+79
TOTAL COOLING UNITS LAST SEASON TO DATE………768  DEPARTURE…….-12

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)………..45 WNW  @   12:54 P.M.
VECTOR #1 (1-Sec)……….45 WNW  @   08:47 A.M.
VECTOR #2 (1-Sec)……….52 WNW  @   12:54 P.M.
DAVIS #1……………….45 W    @   08:47 A.M.
DAVIS #2 ………………44 W    @   09:19 A.M.
RMY #1 (Instantaneous)…..46 WNW  @   08:47 A.M.
RMY #2 (Instantaneous)…..53 WNW  @   12:54 P.M.
MERLIN…………………43 W
RICHARDS (C5C) (Inst)……46 WNW  @   12:54 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………34 WNW  @   09:37 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..30 WNW  @   11:05 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..33 WNW  @   10:35 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………32 WNW  @   11:05 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………33 WNW  @   09:47 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..29 WNW  @   11:05 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..32 WNW  @   11:29 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………30 WNW  @   11:05 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..19.9 WNW [478 total miles] VECTOR #1………………18.9
VECTOR #2………………20.9
DAVIS #1……………….20.0 WNW
DAVIS #2………………….M
RMY #1…………………17.9 WNW
RMY #2…………………20.2 W
RICHARDS (C5C)………….19.0

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.13
TOTAL PRECIPITATION FOR THE MONTH…………..1.61 DEPARTURE…..-0.82
TOTAL PRECIPITATION FOR THE YEAR (2025)…….43.92 DEPARTURE…..-2.67

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE…..-0.5
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.1 DEPARTURE…..-1.2

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PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/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

11/1  56/38/47/+0/0.00/0.0/619/100       50 W   VEC1 50 W   RMY 50
11/2  53/33/43/-4/0.00/0.0/617/100       23 WNW VEC1 23 WNW RMY 24
11/3  54/42/48/+2/0.16/0.0/012/02        41 WNW VEC1 41 W   RMY 46
11/4  54/42/48/+2/0.00/0.0/605/99        52 NW  VEC1 52 NW  RMY 54
11/5  56/39/48/+2/0.06/0.0/091/15        50 W   VEC1 47 W   RMY 52
11/6  50/34/42/-3/0.02/T/449/74          48 WNW VEC1 48 WNW RMY 49
11/7  52/31/42/-3/0.04/0.0/448/74        43 SSW VEC1 42 SSW RMY 47
11/8  60/45/53/+8/0.18/0.0/307/51        32 WNW VEC1 33 WNW RMY 33
11/9  61/46/54/+10/0.15/0.0/216/36       33 ESE VEC1 34 ESE RMY 35
11/10 54/36/45/+1/0.44/0.0/000/00        32 W   VEC1 31 W   RMY 31
11/11 37/30/34/-9/T/T/131/22             46 WNW VEC1 44 WNW RMY 47
11/12 44/30/37/-6/T/T/148/25             32 W   VEC1 32 W   RMY 33
11/13 47/32/40/-3/T/0.0/…/..           32 NW  VEC1 32 NW  RMY 34
11/14 46/32/39/-3/0.00/0.0/…/..        30 NNW VEC1 30 NNW RMY 30
11/15 44/28/36/-6/0.37/0.1/…/..        26 SSE VEC1 26 SSE RMY 26
11/16 52/33/43/+1/0.19/T/…/..          50 NW  VEC1 49 W   RMY 53
11/17 41/29/35/-6/0.00/0.0/…/..        45 WNW VEC1 45 WNW RMY 46

11/18 The low since midnight is 31F, the daily normal low is 33F.

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NOVEMBER DAILY RECORDS TO DATE

NONE.

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

RECORDS FOR NOVEMBER 18
HIGH 72 IN 1963
LOW 10 IN 1936
PRECIP 1.80 INS IN 1929
SNOWFALL 6.3 INS IN 1980
PEAK GUST 60 SW IN 1987

RECORDS FOR NOVEMBER 19
HIGH 72 IN 1941
LOW 10 IN 1936
PRECIP 1.92 INCHES IN 1926
SNOWFALL 11.0 INS IN 1986
PEAK GUST 59e E IN 1945

TODAY’S REPORT PREPARED BY: Matt Douglas