Greater Grand Crossing · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Greater Grand Crossing & 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
98°
Tue, Sep 1
Coldest night
54°
Wed, Sep 9
Days with precip
9 / 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
84° 67°
77% precip chance
Sat 12 – Sun 13 Sep
83° 65°
84% precip chance
Sat 19 – Sun 20 Sep
81° 65°
typical range
Sat 26 – Sun 27 Sep
78° 65°
typical range
30 days — Greater Grand Crossing
14 forecast + 16 climatology
Tue · Today Mostly cloudy
98°73°13%⌄
Wind10 mph SW
Gusts35 mph
UV index8 – High
Precip chance13%
Sunrise06:16
Sunset19:24
Wed · Tomorrow Sunny
92°78°4%⌄
Wind12 mph SW
Gusts30 mph
UV index8 – High
Precip chance4%
Sunrise06:17
Sunset19:22
Thursday 3/9 Showers
93°78°0.9 mm⌄
Wind11 mph SW
Gusts35 mph
UV index5 – Moderate
Precip chance37%
Sunrise06:18
Sunset19:20
Friday 4/9 Sunny
87°71°2.0 mm⌄
Wind9 mph E
Gusts20 mph
UV index7 – High
Precip chance57%
Sunrise06:19
Sunset19:19
Saturday 5/9 Sunny
84°70°19.1 mm⌄
Wind10 mph E
Gusts20 mph
UV index7 – High
Precip chance77%
Sunrise06:20
Sunset19:17
Sunday 6/9 Mostly cloudy
78°67°0.9 mm⌄
Wind7 mph SE
Gusts21 mph
UV index7 – High
Precip chance55%
Sunrise06:21
Sunset19:15
Monday 7/9 Mostly cloudy
85°68°19.1 mm⌄
Wind11 mph N
Gusts22 mph
UV index6 – High
Precip chance88%
Sunrise06:22
Sunset19:14
Tuesday 8/9 Mostly cloudy
69°55°4.7 mm⌄
Wind10 mph NE
Gusts24 mph
UV index4 – Moderate
Precip chance88%
Sunrise06:23
Sunset19:12
Wednesday 9/9 Showers
85°54°5.0 mm⌄
Wind10 mph SW
Gusts25 mph
UV index7 – High
Precip chance80%
Sunrise06:24
Sunset19:10
Thursday 10/9 Sunny
80°66°1.9 mm⌄
Wind10 mph W
Gusts17 mph
UV index7 – High
Precip chance58%
Sunrise06:25
Sunset19:09
Friday 11/9 Showers
71°66°43.6 mm⌄
Wind15 mph SE
Gusts27 mph
UV index5 – Moderate
Precip chance89%
Sunrise06:26
Sunset19:07
Saturday 12/9 Mostly cloudy
83°69°6.5 mm⌄
Wind11 mph SE
Gusts35 mph
UV index7 – High
Precip chance84%
Sunrise06:27
Sunset19:05
Sunday 13/9 Mostly cloudy
71°65°1.7 mm⌄
Wind12 mph S
Gusts34 mph
UV index5 – Moderate
Precip chance74%
Sunrise06:28
Sunset19:03
Monday 14/9 Sunny
74°64°6%⌄
Wind14 mph S
Gusts39 mph
UV index6 – High
Precip chance6%
Sunrise06:29
Sunset19:02
Tuesday 15/9 Rain (climatological)
83°68°26.7 mm⌄
Day≈77–88°
Night≈62–73°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
84°69°20%⌄
Day≈79–90°
Night≈63–74°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
88°71°20%⌄
Day≈82–93°
Night≈65–76°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
86°70°29.0 mm⌄
Day≈80–91°
Night≈64–75°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
81°67°20%⌄
Day≈76–87°
Night≈62–72°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
78°65°20%⌄
Day≈72–83°
Night≈59–70°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
80°66°27.5 mm⌄
Day≈74–85°
Night≈61–71°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
83°68°20%⌄
Day≈77–88°
Night≈62–73°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
87°70°20%⌄
Day≈81–92°
Night≈65–76°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
88°71°14.5 mm⌄
Day≈83–94°
Night≈66–77°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
85°69°20%⌄
Day≈79–90°
Night≈64–74°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
78°65°20%⌄
Day≈73–83°
Night≈60–70°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
78°65°30.5 mm⌄
Day≈72–83°
Night≈59–70°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
81°67°20%⌄
Day≈76–86°
Night≈62–72°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
80°66°20%⌄
Day≈74–85°
Night≈61–72°
Precip≈9.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
87°71°30.5 mm⌄
Day≈82–93°
Night≈65–76°
Precip≈9.0 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 Greater Grand Crossing, 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.