Delta · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Delta & 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
37°
Thu, Aug 20
Coldest night
18°
Tue, Aug 18
Days with precip
4 / 14
of 14 forecast days
Nicest day
Wed, Aug 26
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
36° 21°
36% precip chance
Sat 29 – Sun 30 Aug
33° 21°
57% precip chance
Sat 5 – Sun 6 Sep
30° 17°
typical range
Sat 12 – Sun 13 Sep
28° 16°
typical range
30 days — Delta
14 forecast + 16 climatology
Tue · Today Mostly cloudy
35°18°5%⌄
Wind13 mph SW
Gusts18 mph
UV index10 – Very high
Precip chance5%
Sunrise06:46
Sunset20:22
Wed · Tomorrow Sunny
36°24°2%⌄
Wind11 mph W
Gusts12 mph
UV index10 – Very high
Precip chance2%
Sunrise06:46
Sunset20:20
Thursday 20/8 Mostly cloudy
37°25°7%⌄
Wind12 mph W
Gusts19 mph
UV index10 – Very high
Precip chance7%
Sunrise06:47
Sunset20:19
Friday 21/8 Mostly cloudy
37°20°3.0 mm⌄
Wind20 mph SE
Gusts26 mph
UV index10 – Very high
Precip chance57%
Sunrise06:48
Sunset20:18
Saturday 22/8 Mostly cloudy
35°21°0.5 mm⌄
Wind15 mph E
Gusts21 mph
UV index8 – Very high
Precip chance36%
Sunrise06:49
Sunset20:16
Sunday 23/8 Sunny
36°21°0.1 mm⌄
Wind14 mph SE
Gusts21 mph
UV index9 – Very high
Precip chance17%
Sunrise06:50
Sunset20:15
Monday 24/8 Showers
33°21°3.0 mm⌄
Wind25 mph SW
Gusts28 mph
UV index7 – High
Precip chance58%
Sunrise06:51
Sunset20:13
Tuesday 25/8 Partly cloudy
31°19°0.4 mm⌄
Wind9 mph SE
Gusts15 mph
UV index8 – Very high
Precip chance36%
Sunrise06:52
Sunset20:12
Wednesday 26/8 Sunny
34°21°1%⌄
Wind14 mph W
Gusts15 mph
UV index8 – Very high
Precip chance1%
Sunrise06:53
Sunset20:10
Thursday 27/8 Sunny
35°22°1%⌄
Wind9 mph W
Gusts19 mph
UV index9 – Very high
Precip chance1%
Sunrise06:54
Sunset20:09
Friday 28/8 Mostly cloudy
35°22°5%⌄
Wind11 mph W
Gusts22 mph
UV index8 – Very high
Precip chance5%
Sunrise06:55
Sunset20:07
Saturday 29/8 Partly cloudy
33°21°9%⌄
Wind21 mph SW
Gusts30 mph
UV index7 – High
Precip chance9%
Sunrise06:56
Sunset20:06
Sunday 30/8 Sunny
33°21°2.1 mm⌄
Wind11 mph W
Gusts11 mph
UV index8 – Very high
Precip chance57%
Sunrise06:57
Sunset20:04
Monday 31/8 Partly cloudy
32°20°1.2 mm⌄
Wind11 mph W
Gusts22 mph
UV index8 – Very high
Precip chance57%
Sunrise06:57
Sunset20:03
Tuesday 1/9 Rain (climatological)
31°18°2.6 mm⌄
Day≈28–34°
Night≈15–21°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 2/9 Partly cloudy (climatological)
34°19°20%⌄
Day≈31–37°
Night≈16–22°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 3/9 Partly cloudy (climatological)
33°19°20%⌄
Day≈30–36°
Night≈16–22°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Light rain (climatological)
30°18°1.2 mm⌄
Day≈27–33°
Night≈15–21°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
30°17°20%⌄
Day≈27–33°
Night≈14–20°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
30°17°20%⌄
Day≈27–33°
Night≈14–20°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Light rain (climatological)
29°17°1.6 mm⌄
Day≈26–32°
Night≈14–20°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
30°17°20%⌄
Day≈27–33°
Night≈14–20°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
34°20°20%⌄
Day≈31–37°
Night≈17–23°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
34°20°2.3 mm⌄
Day≈31–37°
Night≈17–23°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
31°18°20%⌄
Day≈28–34°
Night≈15–21°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
28°16°20%⌄
Day≈25–31°
Night≈13–19°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Light rain (climatological)
28°16°1.4 mm⌄
Day≈25–31°
Night≈13–19°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
29°17°20%⌄
Day≈26–32°
Night≈14–20°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
30°18°20%⌄
Day≈27–33°
Night≈15–21°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
32°19°1.8 mm⌄
Day≈29–35°
Night≈16–22°
Precip≈0.9 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 Delta, 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.