West Chester · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
West Chester & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
88°
Tue, Sep 1
Coldest night
58°
Thu, Sep 10
Days with precip
8 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
77° 65°
36% precip chance
Sat 12 – Sun 13 Sep
81° 60°
73% precip chance
Sat 19 – Sun 20 Sep
68° 55°
typical range
Sat 26 – Sun 27 Sep
65° 55°
typical range
30 days — West Chester
14 forecast + 16 climatology
Mon · Today Sunny
83°69°127.8 mm⌄
Wind6 mph S
Gusts17 mph
UV index7 – High
Precip chance79%
Sunrise06:29
Sunset19:36
Tue · Tomorrow Fog
88°71°2.6 mm⌄
Wind10 mph W
Gusts20 mph
UV index8 – High
Precip chance65%
Sunrise06:30
Sunset19:34
Wednesday 2/9 Showers
76°69°6.0 mm⌄
Wind8 mph E
Gusts17 mph
UV index2 – Low
Precip chance89%
Sunrise06:31
Sunset19:32
Thursday 3/9 Showers
86°68°13.7 mm⌄
Wind12 mph W
Gusts23 mph
UV index8 – High
Precip chance90%
Sunrise06:32
Sunset19:31
Friday 4/9 Showers
87°71°3.3 mm⌄
Wind11 mph NW
Gusts23 mph
UV index7 – High
Precip chance74%
Sunrise06:33
Sunset19:29
Saturday 5/9 Mostly cloudy
77°65°0.4 mm⌄
Wind9 mph N
Gusts18 mph
UV index7 – High
Precip chance36%
Sunrise06:34
Sunset19:28
Sunday 6/9 Mostly cloudy
76°66°0.3 mm⌄
Wind6 mph N
Gusts11 mph
UV index6 – High
Precip chance36%
Sunrise06:35
Sunset19:26
Monday 7/9 Sunny
75°60°5%⌄
Wind6 mph SE
Gusts13 mph
UV index6 – High
Precip chance5%
Sunrise06:36
Sunset19:24
Tuesday 8/9 Mostly cloudy
74°62°0.6 mm⌄
Wind8 mph S
Gusts22 mph
UV index5 – Moderate
Precip chance47%
Sunrise06:36
Sunset19:23
Wednesday 9/9 Showers
74°62°16.6 mm⌄
Wind11 mph SE
Gusts26 mph
UV index6 – High
Precip chance90%
Sunrise06:37
Sunset19:21
Thursday 10/9 Showers
65°58°0.4 mm⌄
Wind14 mph NE
Gusts31 mph
UV index4 – Moderate
Precip chance53%
Sunrise06:38
Sunset19:20
Friday 11/9 Showers
71°60°1.9 mm⌄
Wind13 mph NE
Gusts32 mph
UV index5 – Moderate
Precip chance72%
Sunrise06:39
Sunset19:18
Saturday 12/9 Mostly cloudy
70°60°3.4 mm⌄
Wind12 mph NE
Gusts30 mph
UV index5 – Moderate
Precip chance73%
Sunrise06:40
Sunset19:16
Sunday 13/9 Sunny
81°66°6%⌄
Wind5 mph N
Gusts14 mph
UV index7 – High
Precip chance6%
Sunrise06:41
Sunset19:15
Monday 14/9 Rain (climatological)
73°60°39.0 mm⌄
Day≈67–78°
Night≈55–65°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
76°62°20%⌄
Day≈71–81°
Night≈56–67°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
74°61°20%⌄
Day≈69–80°
Night≈55–66°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
70°58°36.0 mm⌄
Day≈65–75°
Night≈53–64°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
69°58°20%⌄
Day≈63–74°
Night≈52–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
68°57°20%⌄
Day≈63–74°
Night≈52–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
64°55°16.0 mm⌄
Day≈59–70°
Night≈49–60°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
68°57°20%⌄
Day≈62–73°
Night≈52–62°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
76°62°20%⌄
Day≈70–81°
Night≈56–67°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
75°62°39.0 mm⌄
Day≈70–81°
Night≈56–67°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
73°60°20%⌄
Day≈68–79°
Night≈55–66°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
69°58°20%⌄
Day≈63–74°
Night≈52–63°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
64°55°24.0 mm⌄
Day≈59–70°
Night≈50–60°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
65°55°20%⌄
Day≈59–70°
Night≈50–61°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
71°59°20%⌄
Day≈66–76°
Night≈54–64°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
75°61°22.0 mm⌄
Day≈70–80°
Night≈56–67°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for West Chester, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.