Wednesday, April 29, 2026

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

WEDNESDAY, APRIL 29, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0442E
SUNSET: 1842E

OVERCAST THROUGH THE MORNING, THEN PARTIAL SUN, STILL COOL….

A weakening frontal system passed through overnight with little
fanfare. Another frontal system pushing into western Pennsylvania
and western New York is slowly heading in our direction. We are
now in the area between these two systems so the weather is quiet
today. Low clouds, drizzle, and fog persisted through the morning,
but now breaks of sun are developing early this afternoon as the
stratus layer slowly burns off. With the continuation of the
onshore flow, temperatures remain on the cooler side again today.

Temperature readings have reached into the lower 50s by early this
afternoon. Normal highs are in the lower 60s now, so it’s yet
another day of below normal readings. Dew points have been holding
in the low to mid 40s through the day.

Winds have been fairly steady again today, generally out of a
northeast to east-northeast direction. The average speed for the
day so far is around 8mph. The peak gust so far is 23mph, which
occurred just after 10:30am this morning.

Visibility was limited through the morning due to the drizzle
and fog, but has improved early this afternoon as the air dries
out a bit. The view varied between 5-20 miles during the morning,
but has improved to around 40-50 miles by early this afternoon.

The maximum temperature so far today is 52F degrees, which is 10
degrees below the normal high of 62F. The minimum temperature
since midnight is 43F degrees, which is equal to the normal low
of 43F.

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Today’s Observations:

7 A.M.
Weather: Overcast stratus, very light drizzle
Temperature: 44F; Dew Point: 43F; Relative Humidity: 96%
Wind: NNE @ 4 kts, wind light
Sea-level pressure: 1019.0 mb; 30.09 in. Hg: rising, then more rapidly
Visibility: 12 miles, 20 miles SW-NW, 5 miles NNE-S, thin fog
6-hr Max temp: 44F
6-hr Min temp: 43F
24-hr Precip: Trace
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E6 OVC 12L- 190/44/43/0304/009/ THN F ALQDS L-B32
PCPN VRY LGT VSBY 20 SW-NW 5 NNE-S WND LGT/ 8/6// 53011 6000/
70000 10044 20043

10 A.M.
Weather: Overcast stratus
Temperature: 47F; Dew Point: 43F; Relative Humidity: 86%
Wind: ENE @ 8 kts
Sea-level pressure: 1017.8 mb; 30.06 in. Hg: steady, then falling
Visibility: 20 miles, 30 miles SE-SW, 8 miles N-E, thin fog
3-hr Precip: Trace
3-hr Snowfall: 0.0 inches
BHO SA 1455 E12 OVC 20 178/47/43/0608/006/ THN F ALQDS L-E40
VSBY 30 SE-SW 8 N-E/ 8/6// 58012 6000/

1 P.M.
Weather: Broken stratocumulus, broken cirrus
Temperature: 51F; Dew Point: 44F; Relative Humidity: 76%
Wind: ENE @ 7 kts, wind NE variable E
Sea-level pressure: 1016.5 mb; 30.02 in. Hg: falling, then more slowly
Visibility: 50 miles, 20 miles N-E
6-hr Max temp: 52F
6-hr Min temp: 44F
6-hr Precip: Trace
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 E15 BKN 250 BKN 50 165/51/44/0707/002/ WND 04V10
VSBY 20 N-E/ 8/501 56013 6000/ 10052 20044

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SUMMARY FOR TUESDAY, APRIL 28, 2026

TEMPERATURE (DEGREES F)
MAX…….56 NORMAL…..62
MIN…….41 NORMAL…..43
MEAN……49 NORMAL…..52

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-3
TOTAL DEPARTURE FOR THE MONTH………………………+33 [+1.0 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….16 DEPARTURE……..+3
TOTAL HEATING UNITS FOR THE MONTH (MAR)………484 DEPARTURE…….-31
TOTAL HEATING UNITS FOR THE SEASON………….5802 DEPARTURE…….-60
TOTAL HEATING UNITS LAST SEASON TO DATE……..5395 DEPARTURE……+407

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)………..24 E @ 02:07 P.M.
VECTOR #1 (1-Sec)……….25 E @ 02:03 P.M.
VECTOR #2 (1-Sec)……….27 E @ 02:03 P.M.
DAVIS #1……………….25 E @ 02:03 P.M.
DAVIS #2 ………………27 E @ 02:03 P.M.
RMY #1 (Instantaneous)…..24 E @ 02:13 P.M.
RMY #2 (Instantaneous)…..27 E @ 02:03 P.M.
MERLIN…………………22 E
RICHARDS (C5C) (Inst)……24 E @ 02:13 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………17 E @ 02:13 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..18 E @ 02:04 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..18 E @ 02:04 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………19 E @ 02:04 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………18 E @ 02:04 P.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..18 E @ 02:04 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..18 E @ 02:04 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………18 E @ 02:04 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………8.2 ENE [197 total miles] VECTOR #1……………….8.7
VECTOR #2……………….9.5
DAVIS #1………………..9.5 ENE
DAVIS #2………………..9.5 ENE
RMY #1………………….8.9 ENE
RMY #2………………….9.2 ENE
RICHARDS (C5C)…………..9.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…….TRACE DEPARTURE…..-0.14
TOTAL PRECIPITATION FOR THE MONTH (APR)……..1.79 DEPARTURE…..-2.69
TOTAL PRECIPITATION FOR THE YEAR (2026)…….13.46 DEPARTURE…..-5.04

SNOWFALL (INCHES) THROUGH THIS MORNING (EST):
TOTAL SNOWFALL 24 HRS ENDING 7 A.M…………..0.0 DEPARTURE……0.0
TOTAL SNOWFALL FOR THE MONTH (APR)…………TRACE DEPARTURE…..-2.8
TOTAL SNOWFALL FOR THE SEASON (2025-2026)……81.6 DEPARTURE….+11.9

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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/-10/0.00/0.0/753/96 30 NNW VEC1 31 NNW RMY 32
4/9 56/30/43/-1/0.00/0.0/755/96 35 S VEC1 35 SSW RMY 35
4/10 67/33/50/+5/0.00/0.0/672/85 37 S VEC1 36 SSW RMY 37
4/11 60/41/51/+6/0.00/0.0/690/87 37 NW VEC1 37 NW RMY 37
4/12 54/35/45/-1/0.02/0.0/549/69 28 S VEC1 28 S RMY 28
4/13 69/41/55/+9/T/0.0/168/21 40 SSW VEC1 41 SSW RMY 42
4/14 83/58/71/+24/0.15/0.0/617/77 46 SSW VEC1 46 SSW RMY 47
4/15 77/44/61/+14/T/0.0/626/78 25 NE VEC1 25 NE RMY 24
4/16 69/45/57/+10/0.37/0.0/347/43 45 NW VEC1 44 NW RMY 50 TSTM
4/17 62/47/55/+7/0.14/0.0/145/18 31 NE VEC1 32 NNW RMY 31
4/18 48/41/45/-3/0.04/0.0/008/01 28 ENE VEC1 26 E RMY 27
4/19 49/34/42/-7/0.14/T/000/00 40 NW VEC1 39 NW RMY 42 TSTM
4/20 50/31/41/-8/T/T/596/73 31 W VEC1 30 W RMY 32
4/21 50/31/41/-9/0.00/0.0/812/99 28 S VEC1 29 S RMY 28
4/22 44/34/39/-11/T/0.0/000/00 31 SSW VEC1 31 SSW RMY 32
4/23 65/40/53/+3/0.00/0.0/…/.. 43 NW VEC1 43 NW RMY 49
4/24 56/35/46/-5/0.00/0.0/…/.. 23 NNW VEC1 24 NNW RMY 23
4/25 51/36/44/-7/0.00/0.0/…/.. 18 NE VEC1 18 NE RMY 19
4/26 57/41/49/-3/0.00/0.0/…/.. 16 ENE VEC1 16 ENE RMY 16
4/27 63/44/54/+2/0.00/0.0/…/.. 23 ENE VEC1 23 ENE RMY 23
4/28 56/41/49/-3/0.00/0.0/…/.. 24 E VEC1 25 E RMY 24