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

Weather in South Yarmouth, Massachusetts

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

South Yarmouth, MA
Sunday, May 17 at 4:11 AM
56
°
Clear
Feels like
51°
Humidity
80%
Wind
13 mph
Sunrise
5:19 AM
Sunset
7:55 PM
South Yarmouth, MA
Hour by hour · 24h
53°
12a
51°
1a
50°
2a
49°
3a
50°
4a
50°
5a
51°
6a
50°
7a
51°
8a
51°
9a
53°
10a
52°
11a
54°
12p
53°
1p
56°
2p
55°
3p
54°
4p
53°
5p
52°
6p
52°
7p
51°
8p
51°
9p
49°
10p
49°
11p
L 49°H 56°
South Yarmouth, MA
7-day forecast
  1. Today
    May 17
    Light Drizzle
    24%
    76°56°
  2. Monday
    May 18
    Overcast
    —
    65°53°
  3. Tuesday
    May 19
    Partly Cloudy
    —
    66°56°
  4. Wednesday
    May 20
    Light Drizzle
    30%
    66°59°
  5. Thursday
    May 21
    Overcast
    30%
    63°51°
  6. Friday
    May 22
    Overcast
    10%
    59°49°
  7. Saturday
    May 23
    Drizzle
    20%
    54°51°
South Yarmouth, MA
Next 24 hours · Cool now
46°52°58°12a6a12p6pnow 53°high 56°low 49°
South Yarmouth, MA
Anemometer · 24h winds · from true
NESW
From · True
SSW
211° · backing 9°
Direction
SSW
211°
Sustained
13
mph
Gust
22
mph
Peak 24h
29
avg 12
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 12 · pk 29 @ 5:00p
−24h−18h−12h−6hnow
Sustained 13 mph with gusts pulsing to 22 — flags snap, branches bend.
South Yarmouth, MA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1013.1
+0.3 mb in 3h · steady · 29.92 inHg
Now
1013.1
mb
3h
+0.3
mb
12h
-0.8
mb
24h
-3.3
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1013–1018
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
South Yarmouth, MA
Air quality
57
AQI
Moderate
PM 2.5
16.1 μg/m³
PM 10
24.4 μg/m³
NO₂
1.3 μg/m³
Ozone
110.0 μg/m³
UV Index
0.0 Low
South Yarmouth, MA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
8:49 AM
Sunrise
5:19 AM
Daylight
14h 36m
Sunset
7:55 PM
Civil dusk
12:27 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
South Yarmouth, MA
The moon
New Moon
0% illuminated
Moonrise
9:21 AM
Moonset
12:21 AM
In sign
♊︎ Gemini
South Yarmouth, 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 →

South Yarmouth at a glance

  • Today vs. normal: 14°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 South Yarmouth

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.