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Monday, April 13, 2026

April 13, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA MONDAY, APRIL 13, 2026 ALL TIMES ARE…

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

MONDAY, APRIL 13, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0506E
SUNSET:  1824E

MAINLY CLOUDY AND BREEZY TODAY, BUT WITH MUCH WARMER TEMPERATURES….

A touch of rain moved through overnight bringing with it only
0.02″ of water. Despite the lack of rainfall today, clouds have
been hanging tough with overcast skies. There has been
some brightening of the skies at times however.

Temperatures have been gradually warming through the day, from the
40s early this morning well into the 60s by early this afternoon.
Dew point levels have also been gradually increasing with values
in the low to mid 40s early this morning rising to the mid 50s
by early this afternoon. As such it does feel a touch more humid,
especially compared to the past couple of days.

Winds began increasing last evening and have remained elevated
through the day today. A south-southwest to southwest flow has been
averaging at around 19mph for the day so far. Gusts have been
frequently exceeding 30mph today. The peak gust so far for the day
is 40mph, which occurred just before 7am this morning.

Visibility has been limited through the day due to haziness.
The view has generally been 20-30 miles all day.

The maximum temperature so far today is 65F degrees, which is
10 degrees above the normal high of 55F. The minimum temperature
since midnight is 41F degrees, which is 4 degrees above the
normal low of 37F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Broken stratocumulus, overcast altostratus
Temperature: 49F; Dew Point: 43F; Relative Humidity: 81%
Wind: SSW @ 21G34 kts, peak wind SSW 39mph at 6:45 A.M.
Sea-level pressure: 1020.2 mb; 30.13 in. Hg: falling, then more slowly
Visibility: 30 miles, hazy
6-hr Max temp: 49F
6-hr Min temp: 42F
24-hr Precip: 0.02 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E20 BKN 30 OVC 30 202/49/43/2021G34/013/ HAZY
PK WND 2034/45/ 8/52/ 56025 6000/ 70002 10049 20042

10 A.M.
Weather: Overcast stratocumulus
Temperature: 56F; Dew Point: 51F; Relative Humidity: 84%
Wind: SW @ 17G27 kts, peak wind SSW 33mph at 9:16 A.M.
Sea-level pressure: 1018.5 mb; 30.08 in. Hg: falling, then more rapidly
Visibility: 25 miles, hazy
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E13 OVC 25 185/56/51/2217G27/008/ HAZY
PK WND 2129/16/ 8/5// 58017

1 P.M.
Weather: Broken altocumulus, few stratus fractus all quadrants
Temperature: 64F; Dew Point: 54F; Relative Humidity: 71%
Wind: SSW @ 19G29 kts, peak wind SSW 35mph at 12:39 P.M.
Sea-level pressure: 1014.3 mb; 29.95 in. Hg: falling, then more rapidly
Visibility: 20 miles, hazy
6-hr Max temp: 65F
6-hr Min temp: 49F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E150 BKN 20 143/64/54/2019G29/995/ FEW STFRA ALQDS
HAZY PK WND 2130/39/ 8/750 58042 10065 20049

————————————————————–

SUMMARY FOR SUNDAY, APRIL 12, 2026

TEMPERATURE (DEGREES F)
MAX…….54   NORMAL…..55
MIN…….35   NORMAL…..37
MEAN……45   NORMAL…..46

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-1
TOTAL DEPARTURE FOR THE MONTH………………………+20 [+1.5 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….20  DEPARTURE……..+1
TOTAL HEATING UNITS FOR THE MONTH (MAR)………240  DEPARTURE…….-21
TOTAL HEATING UNITS FOR THE SEASON………….5558  DEPARTURE…….-50
TOTAL HEATING UNITS LAST SEASON TO DATE……..5219  DEPARTURE……+339

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)………..28 S    @   06:37 P.M.
VECTOR #1 (1-Sec)……….28 S    @   06:37 P.M.
VECTOR #2 (1-Sec)……….28 SSW  @   06:37 P.M.
DAVIS #1……………….30 S    @   08:31 P.M.
DAVIS #2 ……………….M
RMY #1 (Instantaneous)…..28 SSW  @   07:13 P.M.
RMY #2 (Instantaneous)…..29 S    @   06:34 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……26 SSW  @   07:13 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………21 S    @   06:37 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..20 S    @   06:37 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..20 SSW  @   07:23 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………21 S    @   11:40 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….M
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..20 S    @   06:38 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..20 S    @   08:11 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………20 S    @   06:38 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..10.0 S [241 total miles] VECTOR #1………………10.3
VECTOR #2………………10.5
DAVIS #1……………….10.3 SSE
DAVIS #2………………….M
RMY #1…………………10.1 ESE
RMY #2…………………10.5 ESE
RICHARDS (C5C)………….10.5

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.16
TOTAL PRECIPITATION FOR THE MONTH (APR)……..0.94 DEPARTURE…..-1.13
TOTAL PRECIPITATION FOR THE YEAR (2026)…….12.61 DEPARTURE…..-3.48

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH (APR)…………TRACE DEPARTURE…..-1.9
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+12.8

————————————————————–

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1  73/38/56/+15/0.16/0.0/061/08        35 NE  VEC1 34 ENE RMY 35
4/2  38/34/36/-5/0.45/0.0/000/00         31 E   VEC1 31 E   RMY 33
4/3  67/35/51/+9/0.04/0.0/270/35         31 SW  VEC1 31 SW  RMY 35
4/4  58/35/47/+5/0.01/0.0/093/12         39 ENE VEC1 38 ENE RMY 42
4/5  55/36/46/+3/0.16/0.0/008/01         35 NW  VEC1 36 NW  RMY 38
4/6  50/32/41/-2/0.00/0.0/708/91         46 WNW VEC1 46 WNW RMY 47
4/7  50/29/40/-4/0.10/T/336/43           39 WNW VEC1 39 WNW RMY 41
4/8  43/25/34/-10/0.00/0.0/756/96        30 NNW VEC1 31 NNW RMY 32
4/9  56/30/43/-1/0.00/0.0/…/..         35 S   VEC1 35 SSW RMY 35
4/10 67/33/50/+5/0.00/0.0/…/..         37 S   VEC1 36 SSW RMY 37
4/11 60/41/51/+6/0.00/0.0/…/..         37 NW  VEC1 37 NW  RMY 37
4/12 54/35/45/-1/0.02/0.0/…/..         28 S   VEC1 28 S   RMY 28

4/13 The low since midnight is 41F, the daily normal low is 37F.

————————————————————–

APRIL DAILY RECORDS TO DATE

NONE.

————————————————————–

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

RECORDS FOR APRIL 13
HIGH 88 IN 2023
LOW 22 IN 1939
PRECIP 2.51 IN. IN 2004
SNOWFALL 6.8 IN. IN 1933
PEAK GUST 79 MPH S IN 2020

RECORDS FOR APRIL 14
HIGH 88 IN 2023
LOW 21 IN 1923
PRECIP 1.86 IN. IN 1935
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943

TODAY’S REPORT PREPARED BY: Matt Douglas

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Effective January 1, 2025 · Milton, Massachusetts · bluehill.org
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