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
90°
Thu, Sep 3
Coldest night
58°
Sun, Sep 13
Days with precip
4 / 14
of 14 forecast days
Nicest day
Mon, Sep 14
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
79° 65°
6% precip chance
Sat 12 – Sun 13 Sep
75° 58°
2% precip chance
Sat 19 – Sun 20 Sep
80° 66°
typical range
Sat 26 – Sun 27 Sep
76° 65°
typical range
30 days — South Valley Stream
14 forecast + 16 climatology
Tue · Today Showers
88°70°13.4 mm⌄
Wind14 mph NE
Gusts19 mph
UV index6 – High
Precip chance88%
Sunrise06:22
Sunset19:27
Wed · Tomorrow Showers
73°69°1.5 mm⌄
Wind12 mph E
Gusts21 mph
UV index2 – Low
Precip chance70%
Sunrise06:23
Sunset19:26
Thursday 3/9 Showers
90°72°2.3 mm⌄
Wind15 mph W
Gusts32 mph
UV index5 – Moderate
Precip chance67%
Sunrise06:24
Sunset19:24
Friday 4/9 Sunny
87°75°4%⌄
Wind13 mph NW
Gusts18 mph
UV index7 – High
Precip chance4%
Sunrise06:24
Sunset19:22
Saturday 5/9 Sunny
75°68°6%⌄
Wind12 mph N
Gusts21 mph
UV index6 – High
Precip chance6%
Sunrise06:25
Sunset19:21
Sunday 6/9 Sunny
79°65°2%⌄
Wind10 mph N
Gusts14 mph
UV index7 – High
Precip chance2%
Sunrise06:26
Sunset19:19
Monday 7/9 Mostly cloudy
81°68°11%⌄
Wind14 mph SW
Gusts24 mph
UV index6 – High
Precip chance11%
Sunrise06:27
Sunset19:17
Tuesday 8/9 Mostly cloudy
73°70°1.7 mm⌄
Wind13 mph SW
Gusts27 mph
UV index5 – Moderate
Precip chance64%
Sunrise06:28
Sunset19:16
Wednesday 9/9 Sunny
83°69°5%⌄
Wind10 mph N
Gusts17 mph
UV index7 – High
Precip chance5%
Sunrise06:29
Sunset19:14
Thursday 10/9 Sunny
79°70°10%⌄
Wind17 mph S
Gusts30 mph
UV index7 – High
Precip chance10%
Sunrise06:30
Sunset19:12
Friday 11/9 Sunny
83°70°1%⌄
Wind15 mph NW
Gusts28 mph
UV index7 – High
Precip chance1%
Sunrise06:31
Sunset19:11
Saturday 12/9 Sunny
75°60°2%⌄
Wind19 mph NW
Gusts21 mph
UV index6 – High
Precip chance2%
Sunrise06:32
Sunset19:09
Sunday 13/9 Sunny
74°58°1%⌄
Wind11 mph N
Gusts17 mph
UV index6 – High
Precip chance1%
Sunrise06:33
Sunset19:07
Monday 14/9 Sunny
73°61°3%⌄
Wind11 mph S
Gusts18 mph
UV index6 – High
Precip chance3%
Sunrise06:34
Sunset19:06
Tuesday 15/9 Rain (climatological)
82°69°4.8 mm⌄
Day≈76–87°
Night≈64–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
83°70°20%⌄
Day≈78–88°
Night≈64–75°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
82°69°20%⌄
Day≈77–88°
Night≈64–75°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
79°67°3.4 mm⌄
Day≈74–85°
Night≈62–73°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
80°68°20%⌄
Day≈74–85°
Night≈62–73°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°66°20%⌄
Day≈72–83°
Night≈61–72°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
74°65°2.5 mm⌄
Day≈69–80°
Night≈59–70°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
78°67°20%⌄
Day≈73–83°
Night≈61–72°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
81°68°20%⌄
Day≈75–86°
Night≈63–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
84°70°5.3 mm⌄
Day≈79–89°
Night≈65–76°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
80°68°20%⌄
Day≈75–86°
Night≈63–74°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
76°66°20%⌄
Day≈71–82°
Night≈60–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
76°65°2.6 mm⌄
Day≈71–82°
Night≈60–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
76°65°20%⌄
Day≈70–81°
Night≈60–71°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
78°66°20%⌄
Day≈72–83°
Night≈61–72°
Precip≈1.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
84°70°4.8 mm⌄
Day≈79–89°
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 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.