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

FRIDAY, MAY 1, 2026
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0439E
SUNSET: 1844E

PLENTY OF SUNSHINE TODAY UNDER PARTLY CLOUDY SKIES WITH A STEADY
NORTHWESTERLY FLOW….

Today started with mostly cloudy skies and a chilly wind out of
the northwest. Fortunately, we have had plenty of sunshine to
warm things up and there has been a decrease in cloudiness making
this a beautiful start to the month.

Temperatures started in the upper 40’s today with an overnight
low of 43F. Temperatures have increased nicely and almost hitting
normal for this time of year, with a maximum of 61F so far for
the day. Dew points were in the mid to upper 30’s throughout the
day as well.

Winds have been steady out of the northwest for much of the day.
There has been a slight shift to the west-northwest by the early
afternoon. The average speed for the day so far is around 12mph
with gusts in the 18-21mph range. The peak gust so far is 28mph,
which occurred at 8:20am this morning.

Visibility has been a beautiful 70-80 miles today, with visibility
increasing as the afternoon approached. Crisp blue skies and cooler
air have helped.

The maximum temperature so far today is 61F degrees, which is 2
degrees below the normal high of 63F. The minimum temperature
since midnight is 43F degrees, which is 1 degree below the normal
temperature of 44F.

————————————————————–

PRELIMINARY STATS FOR APRIL 2026

TEMPERATURE, Deg. F
Avg. Max. 57.5 [+1.2] Avg. Min. 37.7 [-0.2] Mean 47.6 [+0.5] 24-hour corrected mean: 46.8
Max. for month: 83F on the 14th
Min. for month: 25F on the 8th

HEATING DEGREE DAYS
Total heating units: 518 [-022] Total for the season: 5836 [-051] Total for last season: 5398

COOLING DEGREE DAYS
Total cooling units: 6 [+003] Total for the season: 6 [+003] Total for last season: 3

PRECIPITATION, Inches
Total: 2.00 [-2.76] Greatest in 24 hrs: 0.54 on the 1st-2nd

SNOWFALL, Inches
Total: Trace [-2.8] Greatest in 24 hrs: Trace on the 7th, 19th, 20th

WIND, mph
Avg. uncorrected wind speed: 10.2 mph
Avg. corrected wind speed: 10.8 mph
Prevailing wind direction: East-Northeast [16%] Peak gust and direction: 46 WNW on the 6th
46 SSW on the 14th

SUNSHINE:
Campbell-Stokes card minutes: 11814 of a possible 23250, or 51%
Astronomical total minutes: 12264 of a possible 24131 or 51%

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Today’s Observations:

7 A.M.
Weather: Broken stratocumulus
Temperature: 48F; Dew Point: 38F; Relative Humidity: 68%
Wind: NW @ 10G21 kts
Sea-level pressure: 1010.5 mb; 29.84 in. Hg: rising, then more rapidly
Visibility: 70 miles
6-hr Max temp: 48F
6-hr Min temp: 43F
24-hr Precip: 0.12 inches
24-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1155 E50 BKN 70 105/48/38/3210G21/984/ 8/500 53011 70012
10048 20043

10 A.M.
Weather: Broken stratocumulus
Temperature: 54F; Dew Point: 36F; Relative Humidity: 49%
Wind: NW @ 11G18 kts
Sea-level pressure: 1010.6 mb; 29.84 in. Hg: rising, then falling
Visibility: 70 miles
3-hr Precip: 0.00 inches
3-hr Snowfall: 0.0 inches
BHO SA 1455 E50 BKN 70 106/54/36/3011G18/984/ 8/500 50001

1 P.M.
Weather: Scattered stratocumulus
Temperature: 60F; Dew Point: 36F; Relative Humidity: 41%
Wind: WNW @ 10G18 kts
Sea-level pressure: 1010.3 mb; 29.83 in. Hg: falling, then more slowly
Visibility: 80 miles
6-hr Max temp: 61F
6-hr Min temp: 48F
6-hr Precip: 0.00 inches
6-hr Snowfall: 0.0 inches
Snow Depth: 0 inches
BHO SA 1755 50 SCT 80 103/60/36/2910G18/983/ 8/500 56003
10061 20048

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SUMMARY FOR THURSDAY, APRIL 30, 2026

TEMPERATURE (DEGREES F)
MAX…….52 NORMAL…..63
MIN…….43 NORMAL…..43
MEAN……48 NORMAL…..53

DEPARTURE FROM 30-YEAR (1991-2020) NORMAL…………….-5
TOTAL DEPARTURE FOR THE MONTH………………………+23 [+0.6 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON: JUL 2025 THRU JUN 2026)
TOTAL HEATING UNITS FOR YESTERDAY…………….17 DEPARTURE……..+5
TOTAL HEATING UNITS FOR THE MONTH (MAR)………518 DEPARTURE…….-22
TOTAL HEATING UNITS FOR THE SEASON………….5836 DEPARTURE…….-51
TOTAL HEATING UNITS LAST SEASON TO DATE……..5398 DEPARTURE……+438

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)………..18 ENE @ 10:14 P.M.
VECTOR #1 (1-Sec)……….18 ENE @ 10:14 P.M.
VECTOR #2 (1-Sec)……….18 NE @ 10:35 P.M.
DAVIS #1………………..M
DAVIS #2 ……………….M
RMY #1 (Instantaneous)…..18 ENE @ 10:14 P.M.
RMY #2 (Instantaneous)…..18 NE @ 10:35 P.M.
MERLIN………………….M
RICHARDS (C5C) (Inst)……17 WNW @ 10:14 P.M.

FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………14 WNW @ 10:15 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..15 NW @ 10:15 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..16 WNW @ 10:15 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE…………….M
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE…………….M
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..15 WNW @ 10:15 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..16 NW @ 10:15 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………15 WNW @ 10:15 P.M.

AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL………2.8 W [67 total miles] VECTOR #1……………….5.0
VECTOR #2……………….5.1
DAVIS #1………………….M
DAVIS #2………………….M
RMY #1………………….4.9 WNW
RMY #2………………….4.9 NW
RICHARDS (C5C)…………..5.4

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.12 DEPARTURE…..-0.02
TOTAL PRECIPITATION FOR THE MONTH (APR)……..2.00 DEPARTURE…..-2.76
TOTAL PRECIPITATION FOR THE YEAR (2026)…….13.67 DEPARTURE…..-5.11

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

————————————————————–

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/+3/0.00/0.0/784/95 43 NW VEC1 43 NW RMY 49
4/24 56/35/46/-5/0.00/0.0/810/98 23 NNW VEC1 24 NNW RMY 23
4/25 51/36/44/-7/0.00/0.0/407/49 18 NE VEC1 18 NE RMY 19
4/26 57/41/49/-3/0.00/0.0/283/34 16 ENE VEC1 16 ENE RMY 16
4/27 63/44/54/+2/0.00/0.0/835/100 23 ENE VEC1 23 ENE RMY 23
4/28 56/41/49/-3/0.00/0.0/746/89 24 E VEC1 25 E RMY 24
4/29 53/42/48/-5/0.02/0.0/185/22 23 ENE VEC1 23 ENE RMY 24
4/30 52/43/48/-5/0.19/0.0/000/00 18 WNW VEC1 18 WNW RMY 18