Deltana · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Deltana & 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
57°
Sat, Sep 5
Coldest night
32°
Thu, Sep 3
Days with precip
10 / 14
of 14 forecast days
Nicest day
Mon, Aug 31
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
49° 43°
84% precip chance
Sat 5 – Sun 6 Sep
57° 35°
91% precip chance
Sat 12 – Sun 13 Sep
37° 22°
typical range
Sat 19 – Sun 20 Sep
35° 23°
typical range
30 days — Deltana
14 forecast + 16 climatology
Wed · Today Showers
52°41°1.3 mm⌄
Wind8 mph NW
Gusts25 mph
UV index2 – Low
Precip chance61%
Sunrise06:08
Sunset21:20
Thu · Tomorrow Showers
53°41°7.7 mm⌄
Wind8 mph E
Gusts22 mph
UV index3 – Low
Precip chance82%
Sunrise06:11
Sunset21:17
Friday 28/8 Mostly cloudy
52°46°1.2 mm⌄
Wind12 mph S
Gusts20 mph
UV index3 – Moderate
Precip chance61%
Sunrise06:14
Sunset21:13
Saturday 29/8 Showers
48°43°2.8 mm⌄
Wind6 mph W
Gusts16 mph
UV index2 – Low
Precip chance84%
Sunrise06:17
Sunset21:10
Sunday 30/8 Showers
49°43°1.2 mm⌄
Wind5 mph NE
Gusts19 mph
UV index3 – Moderate
Precip chance66%
Sunrise06:20
Sunset21:06
Monday 31/8 Partly cloudy
54°45°16%⌄
Wind4 mph E
Gusts10 mph
UV index4 – Moderate
Precip chance16%
Sunrise06:23
Sunset21:03
Tuesday 1/9 Showers
49°39°8.3 mm⌄
Wind5 mph W
Gusts12 mph
UV index2 – Low
Precip chance91%
Sunrise06:26
Sunset20:59
Wednesday 2/9 Showers
39°33°2.7 mm⌄
Wind9 mph NW
Gusts21 mph
UV index1 – Low
Precip chance77%
Sunrise06:29
Sunset20:56
Thursday 3/9 Mostly cloudy
49°32°10%⌄
Wind8 mph SE
Gusts16 mph
UV index3 – Moderate
Precip chance10%
Sunrise06:32
Sunset20:52
Friday 4/9 Showers
47°42°9.3 mm⌄
Wind9 mph E
Gusts19 mph
UV index2 – Low
Precip chance89%
Sunrise06:35
Sunset20:48
Saturday 5/9 Showers
57°42°8.2 mm⌄
Wind10 mph E
Gusts24 mph
UV index3 – Moderate
Precip chance91%
Sunrise06:37
Sunset20:45
Sunday 6/9 Showers
52°35°12.3 mm⌄
Wind15 mph NW
Gusts31 mph
UV index2 – Low
Precip chance90%
Sunrise06:40
Sunset20:41
Monday 7/9 Sunny
49°35°10%⌄
Wind5 mph E
Gusts14 mph
UV index3 – Moderate
Precip chance10%
Sunrise06:43
Sunset20:38
Tuesday 8/9 Mostly cloudy
52°36°12%⌄
Wind6 mph E
Gusts14 mph
UV index3 – Moderate
Precip chance12%
Sunrise06:46
Sunset20:34
Wednesday 9/9 Rain (climatological)
37°26°10.0 mm⌄
Day≈31–42°
Night≈20–31°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
38°27°20%⌄
Day≈33–43°
Night≈21–32°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
40°28°20%⌄
Day≈35–46°
Night≈23–34°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
37°26°8.4 mm⌄
Day≈31–42°
Night≈20–31°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
31°22°20%⌄
Day≈26–37°
Night≈17–28°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
28°20°20%⌄
Day≈22–33°
Night≈15–26°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
29°21°11.2 mm⌄
Day≈24–35°
Night≈16–27°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
32°23°20%⌄
Day≈27–38°
Night≈18–29°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
36°25°20%⌄
Day≈30–41°
Night≈20–31°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
38°27°12.4 mm⌄
Day≈33–44°
Night≈21–32°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
35°25°20%⌄
Day≈29–40°
Night≈19–30°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
32°23°20%⌄
Day≈27–37°
Night≈18–28°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
31°22°7.6 mm⌄
Day≈26–37°
Night≈17–28°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
29°21°20%⌄
Day≈24–35°
Night≈16–27°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
32°23°20%⌄
Day≈27–38°
Night≈18–29°
Precip≈4.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
37°26°14.8 mm⌄
Day≈31–42°
Night≈20–31°
Precip≈4.7 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 Deltana, 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.