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Sunday, April 5, 2026

April 5, 2026

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA SUNDAY, APRIL 5, 2026 ALL TIMES ARE…

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

SUNDAY, APRIL 5, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0520E
SUNSET:  1815E

OVERCAST SKIES WITH DENSE FOG, DRIZZLE, AND PERIODS OF SHOWERS….

It’s been another dreary day so far with the summit in the
clouds leading to very low visibility. Drizzle was fairly
continuous from last evening into the mid morning hours of
this morning. Since then intermittent rain showers have been
occurring. All of this simply translates into another
miserable early spring day here in eastern Massachusetts.

Temperatures are gradually rising as the return flow ahead
of a cold front tries to pull warmer air up from the Mid
Atlantic region. This warm air advection is what’s resulting
in all the clouds and fog today. Readings were in the mid 30s
during the wee hours, then began to slowing rise, reaching
near 50F by late this morning, and into the mid 50s by early
this afternoon. The dew point has been rising in tandem, thus
keeping the air saturated.

Winds have gradually veered from the east and southeast to the
south-southwest and southwest, and then to the west. Speeds
were steady overnight, then dropped off for a time early this
morning, before increasing again during the mid to late morning
period. It has since dropped off again early this afternoon.
The average speed for the day so far is around 9mph. It was a
bit gusty for a time during the mid to late morning period as
well. The peak gust so far for the day occurred just before
10am this morning with a speed of 24mph.

Visibility has been quite limited with the dense fog. The view
has been holding at around 1/8th of a mile all day.

The maximum temperature so far today is 52F degrees, which is
equal to the normal high of 52F. The minimum temperature since
midnight is 36F degrees, which is 2 degrees above the normal
low of 34F.

————————————————————–

Today’s Observations:

7 A.M.
Weather: Sky obscured, vertical visibility 200ft, light drizzle
Temperature: 40F; Dew Point: 40F; Relative Humidity: 100%
Wind: SSW @ 5 kts, wind light
Sea-level pressure: 1014.5 mb; 29.96 in. Hg: falling, then more slowly
Visibility: 1/8 mile, fog
6-hr Max temp: 40F
6-hr Min temp: 36F
24-hr Precip: 0.02 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 X W2 1/8L-F 145/40/40/2105/996/ WND LGT/
8//// 56041 6001/ 70002 10040 20036

10 A.M.
Weather: Sky obscured, vertical visibility 200ft
Temperature: 49F; Dew Point: 49F; Relative Humidity: 100%
Wind: SSW @ 13G18 kts
Sea-level pressure: 1010.7 mb; 29.85 in. Hg: falling steadily
Visibility: 1/8 mile, fog
3-hr Precip: 0.01 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 X W2 1/8F 107/49/49/2113G18/985/ INTMT RW-E35/
8//// 57038 6001/

1 P.M.
Weather: Sky obscured, vertical visibility 200ft, intermittent
light rain showers
Temperature: 50F; Dew Point: 50F; Relative Humidity: 100%
Wind: W @ 7 kts
Sea-level pressure: 1009.4 mb; 29.81 in. Hg: falling, then more slowly
Visibility: 1/8 mile, fog
6-hr Max temp: 52F
6-hr Min temp: 40F
6-hr Precip: 0.03 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 X W2 1/8RW-F 094/50/50/2607/981/ RW- INTMT/
8//// 56013 6003/ 10052 20040

————————————————————–

SUMMARY FOR SATURDAY, APRIL 4, 2026

TEMPERATURE (DEGREES F)
MAX…….58   NORMAL…..51
MIN…….35   NORMAL…..33
MEAN……47   NORMAL…..42

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….+5
TOTAL DEPARTURE FOR THE MONTH………………………+24 [+5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….18  DEPARTURE……..-5
TOTAL HEATING UNITS FOR THE MONTH (MAR)……….70  DEPARTURE…….-24
TOTAL HEATING UNITS FOR THE SEASON………….5388  DEPARTURE…….-53
TOTAL HEATING UNITS LAST SEASON TO DATE……..5005  DEPARTURE……+383

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)………..39 ENE  @   10:53 A.M.
VECTOR #1 (1-Sec)……….38 ENE  @   10:53 A.M.
VECTOR #2 (1-Sec)……….39 ENE  @   11:04 A.M.
DAVIS #1……………….39 E    @   10:53 A.M.
DAVIS #2 ………………38 ENE  @   11:04 A.M.
RMY #1 (Instantaneous)…..42 ENE  @   10:52 A.M.
RMY #2 (Instantaneous)…..40 ENE  @   10:52 A.M.
MERLIN…………………39 ENE
RICHARDS (C5C) (Inst)……40 ENE  @   10:52 A.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………28 E    @   11:04 A.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..25 ENE  @   10:54 A.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..28 ENE  @   10:54 A.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………29 ENE  @   10:54 A.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………28 E    @   10:54 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..26 ENE  @   10:54 A.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..28 ENE  @   10:54 A.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………26 ENE  @   10:54 A.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..14.1 E  [339 total miles] VECTOR #1………………13.5
VECTOR #2………………14.5
DAVIS #1……………….14.8 E
DAVIS #2……………….14.5 E
RMY #1…………………13.9 ENE
RMY #2…………………14.2 ENE
RICHARDS (C5C)………….14.1

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.02 DEPARTURE…..-0.15
TOTAL PRECIPITATION FOR THE MONTH (APR)……..0.67 DEPARTURE……0.00
TOTAL PRECIPITATION FOR THE YEAR (2026)…….12.34 DEPARTURE…..-2.35

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE…..-0.2
TOTAL SNOWFALL FOR THE MONTH (APR)…………..0.0 DEPARTURE…..-0.8
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+13.9

————————————————————–

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/…/..        35 NE  VEC1 34 ENE RMY 35
4/2  38/34/36/-5/0.45/0.0/…/..         31 E   VEC1 31 E   RMY 33
4/3  67/35/51/+9/0.04/0.0/…/..         31 SW  VEC1 31 SW  RMY 35
4/4  58/35/47/+5/0.01/0.0/…/..         39 ENE VEC1 38 ENE RMY 42

4/5 The low since midnight is 36F, the daily normal low is 34F.

————————————————————–

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 5
HIGH 81 IN 1928
LOW 15 IN 1995
PRECIP 2.15 IN. IN 1987
SNOWFALL 4.0 IN. IN 1898
PEAK GUST 76 MPH WNW IN 1963

RECORDS FOR APRIL 6
HIGH 82 IN 1921
LOW 16 IN 1982
PRE 1.72 INS IN 1886
SNOW 12.3 INS IN 1982
WIND 71e MPH WNW IN 1940

TODAY’S REPORT PREPARED BY: Matt Douglas

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Please read the full Policy before accessing Observatory data · Effective January 1, 2025

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