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

Weather in Cornwall, Pennsylvania

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

Cornwall, PA
Sunday, May 17 at 1:42 AM
71
°
Overcast
Feels like
69°
Humidity
53%
Wind
6 mph
Sunrise
5:48 AM
Sunset
8:15 PM
Cornwall, PA
Hour by hour · 24h
51°
9p
51°
10p
50°
11p
50°
12a
50°
1a
49°
2a
49°
3a
50°
4a
49°
5a
49°
6a
49°
7a
51°
8a
53°
9a
55°
10a
58°
11a
60°
12p
62°
1p
64°
2p
65°
3p
66°
4p
67°
5p
68°
6p
67°
7p
65°
8p
L 49°H 68°
Cornwall, PA
7-day forecast
  1. Today
    May 16
    Overcast
    11%
    80°52°
  2. Sunday
    May 17
    Overcast
    13%
    84°62°
  3. Monday
    May 18
    Thunderstorm
    85°66°
  4. Tuesday
    May 19
    Thunderstorm
    11%
    87°63°
  5. Wednesday
    May 20
    Heavy Drizzle
    78%
    83°57°
  6. Thursday
    May 21
    Overcast
    27%
    68°46°
  7. Friday
    May 22
    Drizzle
    36%
    55°47°
Cornwall, PA
Anemometer · 24h winds · from true
NESW
From · True
SW
231° · veering 42°
Direction
SW
231°
Sustained
6
mph
Gust
13
mph
Peak 24h
24
avg 7
Beaufort · 2 · LIGHT 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 7 · pk 24 @ 5:00p
−24h−18h−12h−6hnow
Light breeze veering 42° from the sw.
Cornwall, PA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
993.3
-0.2 mb in 3h · steady · 29.33 inHg
Now
993.3
mb
3h
-0.2
mb
12h
-1.9
mb
24h
-2.4
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 992998
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Cornwall, PA
Air quality
86
AQI
Moderate
PM 2.5
10.9 μg/m³
PM 10
11.7 μg/m³
NO₂
6.5 μg/m³
Ozone
97.0 μg/m³
UV Index
0.0 Low
Cornwall, PA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
9:19 AM
Sunrise
5:48 AM
Daylight
14h 27m
Sunset
8:15 PM
Civil dusk
12:47 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Cornwall, PA
The moon
New Moon
0% illuminated
Moonrise
9:52 AM
Moonset
12:43 AM
In sign
♉︎ Taurus
Cornwall, PA
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 →

Cornwall at a glance

  • Today vs. normal: 71°F — typical for the season
  • Last frost: April 18 (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.

ZIP codes in Cornwall

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.