Caseyville · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Caseyville & 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
105°
Fri, Sep 4
Coldest night
62°
Sun, Aug 23
Days with precip
3 / 14
of 14 forecast days
Nicest day
Sun, Aug 23
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
96° 69°
57% precip chance
Sat 5 – Sun 6 Sep
105° 66°
typical range
Sat 12 – Sun 13 Sep
84° 64°
typical range
Sat 19 – Sun 20 Sep
87° 65°
typical range
30 days — Caseyville
14 forecast + 16 climatology
Sun · Today Mostly cloudy
83°62°12%⌄
Wind8 mph E
Gusts19 mph
UV index7 – High
Precip chance12%
Sunrise06:21
Sunset19:44
Mon · Tomorrow Showers
83°67°0.6 mm⌄
Wind12 mph E
Gusts26 mph
UV index9 – Very high
Precip chance40%
Sunrise06:22
Sunset19:42
Tuesday 25/8 Showers
83°69°0.5 mm⌄
Wind12 mph SE
Gusts20 mph
UV index8 – High
Precip chance45%
Sunrise06:23
Sunset19:41
Wednesday 26/8 Sunny
87°66°0.8 mm⌄
Wind10 mph NE
Gusts21 mph
UV index3 – Moderate
Precip chance47%
Sunrise06:24
Sunset19:39
Thursday 27/8 Sunny
87°69°0.2 mm⌄
Wind9 mph SE
Gusts18 mph
UV index8 – Very high
Precip chance17%
Sunrise06:25
Sunset19:38
Friday 28/8 Sunny
87°67°5%⌄
Wind9 mph E
Gusts19 mph
UV index8 – Very high
Precip chance5%
Sunrise06:25
Sunset19:36
Saturday 29/8 Mostly cloudy
90°69°0.2 mm⌄
Wind13 mph S
Gusts27 mph
UV index7 – High
Precip chance21%
Sunrise06:26
Sunset19:35
Sunday 30/8 Sunny
96°72°2.2 mm⌄
Wind9 mph NE
Gusts22 mph
UV index9 – Very high
Precip chance57%
Sunrise06:27
Sunset19:33
Monday 31/8 Showers
89°69°9.3 mm⌄
Wind13 mph S
Gusts27 mph
UV index8 – Very high
Precip chance79%
Sunrise06:28
Sunset19:32
Tuesday 1/9 Thunderstorms
87°73°4.0 mm⌄
Wind10 mph SE
Gusts32 mph
UV index7 – High
Precip chance77%
Sunrise06:29
Sunset19:30
Wednesday 2/9 Sunny
102°82°0.2 mm⌄
Wind11 mph SW
Gusts35 mph
UV index8 – Very high
Precip chance17%
Sunrise06:30
Sunset19:29
Thursday 3/9 Mostly cloudy
98°78°0.6 mm⌄
Wind12 mph SW
Gusts21 mph
UV index8 – Very high
Precip chance36%
Sunrise06:31
Sunset19:27
Friday 4/9 Sunny
105°80°1%⌄
Wind13 mph W
Gusts26 mph
UV index10 – Very high
Precip chance1%
Sunrise06:32
Sunset19:26
Saturday 5/9 Sunny
105°85°4%⌄
Wind11 mph W
Gusts23 mph
UV index10 – Very high
Precip chance4%
Sunrise06:32
Sunset19:24
Sunday 6/9 Rain (climatological)
84°66°4.8 mm⌄
Day≈79–90°
Night≈61–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
89°69°20%⌄
Day≈84–94°
Night≈64–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
87°68°20%⌄
Day≈82–92°
Night≈62–73°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
85°66°2.9 mm⌄
Day≈79–90°
Night≈61–72°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
80°64°20%⌄
Day≈75–86°
Night≈58–69°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
82°65°20%⌄
Day≈77–87°
Night≈59–70°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
80°64°5.3 mm⌄
Day≈75–86°
Night≈58–69°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
84°66°20%⌄
Day≈79–90°
Night≈61–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
90°69°20%⌄
Day≈85–95°
Night≈64–75°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
89°69°2.5 mm⌄
Day≈84–95°
Night≈64–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
88°68°20%⌄
Day≈83–94°
Night≈63–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
83°65°20%⌄
Day≈77–88°
Night≈60–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
83°65°3.7 mm⌄
Day≈77–88°
Night≈60–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
82°65°20%⌄
Day≈77–88°
Night≈59–70°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
87°68°20%⌄
Day≈82–93°
Night≈62–73°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
91°70°3.3 mm⌄
Day≈86–97°
Night≈65–76°
Precip≈1.6 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 Caseyville, 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.