Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Onset, Massachusetts

Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →

Onset, MA
Sunday, May 17 at 2:39 AM
57
°
Clear
Feels like
50°
Humidity
73%
Wind
13 mph
Sunrise
5:21 AM
Sunset
7:56 PM
Onset, MA
Hour by hour · 24h
54°
11%
10p
51°
13%
11p
50°
12a
49°
1a
48°
2a
47°
3a
47°
4a
49°
5a
51°
6a
51°
7a
52°
8a
54°
9a
53°
10a
54°
11a
58°
12p
60°
1p
59°
2p
60°
3p
56°
4p
54°
5p
53°
6p
53°
7p
53°
8p
51°
9p
L 47°H 60°
Onset, MA
7-day forecast
  1. Today
    May 16
    Overcast
    —
    66°44°
  2. Sunday
    May 17
    Light Drizzle
    17%
    76°56°
  3. Monday
    May 18
    Overcast
    —
    73°56°
  4. Tuesday
    May 19
    Light Drizzle
    —
    76°56°
  5. Wednesday
    May 20
    Drizzle
    29%
    76°61°
  6. Thursday
    May 21
    Overcast
    29%
    64°50°
  7. Friday
    May 22
    Overcast
    —
    65°48°
Onset, MA
Next 24 hours · Cool now
44°53°62°12a6a12p6pnow 54°high 60°low 47°PRECIP %
Onset, MA
Anemometer · 24h winds · from true
NESW
From · True
SSW
201° · backing 26°
Direction
SSW
201°
Sustained
13
mph
Gust
24
mph
Peak 24h
33
avg 13
Beaufort · 4 · MOD BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 13 · pk 33 @ 7:00p
−24h−18h−12h−6hnow
Sustained 13 mph with gusts pulsing to 24 — flags snap, branches bend.
Onset, MA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1014.3
-0.3 mb in 3h · falling · 29.95 inHg
Now
1014.3
mb
3h
-0.3
mb
12h
-2.0
mb
24h
-2.5
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1013–1019
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Onset, MA
Air quality
55
AQI
Moderate
PM 2.5
15.3 μg/m³
PM 10
22.4 μg/m³
NO₂
2.1 μg/m³
Ozone
108.0 μg/m³
UV Index
0.0 Low
Onset, MA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
8:51 AM
Sunrise
5:21 AM
Daylight
14h 35m
Sunset
7:56 PM
Civil dusk
12:29 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Onset, MA
The moon
New Moon
0% illuminated
Moonrise
9:22 AM
Moonset
12:24 AM
In sign
♊︎ Gemini
Onset, MA
Microseason · 28 of 72
May 16–20

Roses open along the stoops

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Onset at a glance

  • Today vs. normal: 13°F below the seasonal normal for this latitude
  • Last frost: April 26 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Warm-season window is open

As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.

All cities in Massachusetts →

ZIP codes in Onset

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.