Sunday, November 30, 2025

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

SUNDAY, NOVEMBER 30, 2025
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0653E
SUNSET:  1613E

A RAW, DAMP FINISH TO METEOROLOGICAL FALL AS LIGHT RAIN
LINGERS ON THE LAST DAY OF NOVEMBER….

This morning at sunrise there were some peaks of red that
attempted to break through the clouds, but just couldn’t get
through. As the day progressed, we remained under overcast
skies. There was a brief rain event at 10am and then it
dried out before more rain moved into the area and has
settled over for quite a bit longer. As of 1pm we have a trace
of precipitation, but it seems like there will be some
measurable rain before the end of the day. Even so, we will
more than likely finish at a deficit for the month, as we were
-4.01″ for the month as of this morning.

Temperatures have been more seasonable today, though it hasn’t
felt like it with the rainy and raw conditions. Temperatures
hovered just below freezing during the overnight and rose quite
steadily until the late morning. During the afternoon with the
arrival of some light rain, temperatures started to decrease.
Dew points started in the upper teens this morning but have
increased with the rain. At the final observation, the dew point
was at 36F.

The wind has been steady with a mostly southerly flow. The average
speed for the day so far is around 10mph. The peak gust for the day
so far is around 27mph, which occurred at 11:23am this morning.

Visibility was around 30-40 miles for most of the day until the
rain moved in, which degraded to around 15 miles.

The maximum temperature so far today is 42F degrees, which is
3 degrees below the normal high of 45F. The minimum temperature
since midnight is 28F degrees, which is 1 degree below the
normal low of 29F.

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Today’s Observations:

7 A.M.
Weather: Overcast altocumulus, few breaks in overcast NNE-NE,
few sctratocumulus distant NE-ESE
Temperature: 32F; Dew Point: 19F; Relative Humidity: 58%
Wind: SE @ 11 kts
Sea-level pressure: 1030.6 mb; 30.43 in. Hg: falling, then
more slowly
Visibility: 30 miles
6-hr Max temp: 32F
6-hr Min temp: 28F
24-hr Precip: 0.00 inches
24-hr Snowfall: 0.0 inches
BHO SA 1155 E120 OVC 30 306/32/19/1411/043/ FEW BINOVC NNE-NE
FEW SC DSNT NE-ESE/ 8/55/ 56023 10032 20028

10 A.M.
Weather: Light rain, broken stratocumulus, overcast altocumulus
Temperature: 36F; Dew Point: 29F; Relative Humidity: 75%
Wind: SE @ 12 kts
Sea-level pressure: 1028.0 mb; 30.36 in. Hg: falling, then
more slowly
Visibility: 40 miles
3-hr Precip: Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 E50 BKN 120 OVC 40R- 280/36/29/1412/036/ VIRGA WSW-W
PCPN VRY LGT/ 8/55/ 56026 6000/

1 P.M.
Weather: Light rain, overcast stratus
Temperature: 41F; Dew Point: 36F; Relative Humidity: 82%
Wind: S @ 11 kts
Sea-level pressure: 1023.4 mb; 30.22 in. Hg: falling, then more
slowly
Visibility: 15 miles, 8 miles N-ENE
6-hr Max temp: 42F
6-hr Min temp: 32F
6-hr Precip: Trace
6-hr Snowfall: 0.0 inches
BHO SA 1755 E45 OVC 15R- 234/41/36/1811/022/ VSBY 8 N-ENE
PCPN VRY LGT/ 8/6// 56046 6000/ 10042 20032

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SUMMARY FOR SATURDAY, NOVEMBER 29, 2025

TEMPERATURE (DEGREES F)
MAX…….40   NORMAL…..45
MIN…….27   NORMAL…..30
MEAN……34   NORMAL…..38

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-4
TOTAL DEPARTURE FOR THE MONTH………………………-16 [-0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….31  DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH……………679  DEPARTURE…….+15
TOTAL HEATING UNITS FOR THE SEASON………….1090  DEPARTURE…….-86
TOTAL HEATING UNITS LAST SEASON TO DATE………911  DEPARTURE……+179

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)………..36 WNW  @   12:11 A.M.
VECTOR #1 (1-Sec)……….36 WNW  @   12:05 A.M.
VECTOR #2 (1-Sec)……….38 WNW  @   11:49 A.M.
DAVIS #1……………….36 W    @   12:05 A.M.
DAVIS #2 ………………35 WNW  @   12:00 A.M.
RMY #1 (Instantaneous)…..36 NW   @   12:12 A.M.
RMY #2 (Instantaneous)…..38 WNW  @   11:49 A.M.
MERLIN…………………35 NW
RICHARDS (C5C) (Inst)……36 W    @   12:05 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………26 WNW  @   12:11 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 WNW  @   12:11 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..38 WNW  @   11:50 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………27 W    @   12:11 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………27 W    @   12:11 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..24 WNW  @   09:08 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..26 WNW  @   11:50 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………25 WNW  @   09:08 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..13.3 WNW [320 total miles] VECTOR #1………………13.0
VECTOR #2………………14.1
DAVIS #1……………….13.6 WNW
DAVIS #2……………….13.8 WNW
RMY #1…………………12.4 WNW
RMY #2…………………13.7 WNW
RICHARDS (C5C)………….13.3

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH…………..1.99 DEPARTURE…..-2.16
TOTAL PRECIPITATION FOR THE YEAR (2025)…….44.30 DEPARTURE…..-4.01

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.2
TOTAL SNOWFALL FOR THE MONTH………………..0.1 DEPARTURE…..-1.6
TOTAL SNOWFALL FOR THE SEASON (2025-2026)…….0.1 DEPARTURE…..-2.3

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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/0.0/071/12           32 NW  VEC1 32 NW  RMY 34
11/14 46/32/39/-3/0.00/0.0/495/84        30 NNW VEC1 30 NNW RMY 30
11/15 44/28/36/-6/0.37/0.1/522/89        26 SSE VEC1 26 SSE RMY 26
11/16 52/33/43/+1/0.19/T/280/48          50 NW  VEC1 49 W   RMY 53
11/17 41/29/35/-6/0.00/0.0/495/85        45 WNW VEC1 45 WNW RMY 46
11/18 46/30/38/-3/0.00/0.0/574/99        31 WNW VEC1 32 WNW RMY 33
11/19 44/27/36/-5/0.00/0.0/527/91        20 NNW VEC1 19 NW  RMY 20
11/20 45/27/36/-4/0.00/0.0/300/52        16 NNW VEC1 16 NNW RMY 16
11/21 45/34/40/0/0.00/0.0/075/13         28 SW  VEC1 28 SW  RMY 26
11/22 45/31/38/-2/0.16/0.0/046/08        22 NNW VEC1 22 NNW RMY 23
11/23 39/28/34/-5/T/T/154/27             18 WNW VEC1 19 WNW RMY 19
11/24 49/33/41/+2/T/T/506/89             30 NW  VEC1 31 NW  RMY 30
11/25 49/35/42/+3/0.14/0.0/000/00        32 S   VEC1 32 S   RMY 32
11/26 59/48/54/+16/0.08/0.0/040/07       33 S   VEC1 33 S   RMY 35
11/27 52/34/43/+5/T/0.0/525/93           43 WNW VEC1 43 WNW RMY 43
11/28 40/31/36/-2/T/T/417/74             42 W   VEC1 42 W   RMY 45
11/29 40/27/34/-4/0.00/0.0/…/..        36 WNW VEC1 36 W   RMY 36

11/30 The low since midnight is 28F, the daily normal low is 29F.

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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 30
HIGH 67 IN 2006
LOW 6 IN 1891
PRECIP 2.50 INCHES IN 1944
SNOWFALL 10.2 INS IN 1945
PEAK GUST 90 SSW IN 1963

RECORDS FOR DECEMBER 1
HIGH 70 IN 2001
LOW 3 IN 1887
PRECIP 1.46 INS. IN 1917
SNOW 5.7 INS. IN 2019
PEAK GUST 72 MPH NW IN 1964

TODAY’S REPORT PREPARED BY: Amanda Joly