South Valley Stream · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
South Valley Stream & 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
33°
Sat, Sep 12
Coldest night
12°
Wed, Sep 9
Days with precip
7 / 14
of 14 forecast days
Nicest day
Thu, Sep 10
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
28° 17°
4% precip chance
Sat 12 – Sun 13 Sep
33° 23°
24% precip chance
Sat 19 – Sun 20 Sep
27° 19°
typical range
Sat 26 – Sun 27 Sep
25° 18°
typical range
30 days — South Valley Stream
14 forecast + 16 climatology
Tue · Today Showers
31°21°129.6 mm⌄
Wind15 mph NE
Gusts19 mph
UV index7 – High
Precip chance89%
Sunrise06:22
Sunset19:27
Wed · Tomorrow Showers
26°21°0.9 mm⌄
Wind13 mph NE
Gusts20 mph
UV index6 – High
Precip chance59%
Sunrise06:23
Sunset19:25
Thursday 3/9 Showers
28°22°8.0 mm⌄
Wind12 mph SW
Gusts21 mph
UV index6 – High
Precip chance82%
Sunrise06:23
Sunset19:24
Friday 4/9 Sunny
32°23°1.2 mm⌄
Wind13 mph NW
Gusts17 mph
UV index7 – High
Precip chance57%
Sunrise06:24
Sunset19:22
Saturday 5/9 Sunny
28°21°2%⌄
Wind14 mph N
Gusts22 mph
UV index7 – High
Precip chance2%
Sunrise06:25
Sunset19:21
Sunday 6/9 Sunny
25°17°4%⌄
Wind14 mph N
Gusts23 mph
UV index6 – High
Precip chance4%
Sunrise06:26
Sunset19:19
Monday 7/9 Sunny
26°18°3%⌄
Wind9 mph S
Gusts16 mph
UV index7 – High
Precip chance3%
Sunrise06:27
Sunset19:17
Tuesday 8/9 Showers
24°21°10.2 mm⌄
Wind18 mph SW
Gusts36 mph
UV index6 – High
Precip chance84%
Sunrise06:28
Sunset19:16
Wednesday 9/9 Mostly cloudy
23°12°1.1 mm⌄
Wind18 mph W
Gusts35 mph
UV index6 – High
Precip chance57%
Sunrise06:29
Sunset19:14
Thursday 10/9 Mostly cloudy
24°14°5%⌄
Wind11 mph NW
Gusts13 mph
UV index5 – Moderate
Precip chance5%
Sunrise06:30
Sunset19:12
Friday 11/9 Mostly cloudy
25°19°1.3 mm⌄
Wind12 mph S
Gusts22 mph
UV index6 – High
Precip chance57%
Sunrise06:31
Sunset19:11
Saturday 12/9 Mostly cloudy
33°23°0.2 mm⌄
Wind16 mph W
Gusts24 mph
UV index8 – Very high
Precip chance24%
Sunrise06:32
Sunset19:09
Sunday 13/9 Mostly cloudy
29°24°11%⌄
Wind10 mph W
Gusts22 mph
UV index6 – High
Precip chance11%
Sunrise06:33
Sunset19:07
Monday 14/9 Mostly cloudy
25°19°1.3 mm⌄
Wind12 mph NE
Gusts19 mph
UV index5 – Moderate
Precip chance62%
Sunrise06:34
Sunset19:06
Tuesday 15/9 Rain (climatological)
28°20°35.0 mm⌄
Day≈25–31°
Night≈17–23°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
29°21°20%⌄
Day≈26–32°
Night≈18–24°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
29°21°20%⌄
Day≈26–32°
Night≈18–24°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
27°19°25.0 mm⌄
Day≈24–30°
Night≈16–22°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
27°20°20%⌄
Day≈24–30°
Night≈17–23°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
26°19°20%⌄
Day≈23–29°
Night≈16–22°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
24°18°18.0 mm⌄
Day≈21–27°
Night≈15–21°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
26°19°20%⌄
Day≈23–29°
Night≈16–22°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
28°20°20%⌄
Day≈25–31°
Night≈17–23°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
30°21°39.0 mm⌄
Day≈27–33°
Night≈18–24°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
28°20°20%⌄
Day≈25–31°
Night≈17–23°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
25°18°20%⌄
Day≈22–28°
Night≈15–21°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
25°18°19.0 mm⌄
Day≈22–28°
Night≈15–21°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
25°18°20%⌄
Day≈22–28°
Night≈15–21°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
26°19°20%⌄
Day≈23–29°
Night≈16–22°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
30°21°35.0 mm⌄
Day≈27–33°
Night≈18–24°
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 South Valley Stream, 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.