Blue Grass · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Blue Grass & 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
95°
Wed, Sep 9
Coldest night
57°
Wed, Sep 16
Days with precip
3 / 14
of 14 forecast days
Nicest day
Fri, Sep 11
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
82° 64°
5% precip chance
Sat 12 – Sun 13 Sep
83° 62°
3% precip chance
Sat 19 – Sun 20 Sep
91° 67°
typical range
Sat 26 – Sun 27 Sep
90° 69°
typical range
30 days — Blue Grass
14 forecast + 16 climatology
Thu · Today Heavy rain
92°69°150.1 mm⌄
Wind11 mph W
Gusts20 mph
UV index7 – High
Precip chance84%
Sunrise06:29
Sunset19:29
Fri · Tomorrow Sunny
85°72°0.3 mm⌄
Wind11 mph NW
Gusts22 mph
UV index6 – Moderate
Precip chance36%
Sunrise06:30
Sunset19:27
Saturday 5/9 Sunny
81°66°3%⌄
Wind12 mph N
Gusts24 mph
UV index6 – High
Precip chance3%
Sunrise06:31
Sunset19:25
Sunday 6/9 Sunny
82°64°5%⌄
Wind8 mph S
Gusts16 mph
UV index6 – Moderate
Precip chance5%
Sunrise06:32
Sunset19:24
Monday 7/9 Sunny
85°61°1.0 mm⌄
Wind7 mph SW
Gusts14 mph
UV index7 – High
Precip chance36%
Sunrise06:33
Sunset19:22
Tuesday 8/9 Mostly cloudy
87°70°0.6 mm⌄
Wind8 mph NW
Gusts17 mph
UV index7 – High
Precip chance46%
Sunrise06:34
Sunset19:21
Wednesday 9/9 Sunny
95°77°6%⌄
Wind11 mph W
Gusts32 mph
UV index8 – Very high
Precip chance6%
Sunrise06:35
Sunset19:19
Thursday 10/9 Sunny
85°72°1%⌄
Wind13 mph NW
Gusts31 mph
UV index7 – High
Precip chance1%
Sunrise06:36
Sunset19:17
Friday 11/9 Sunny
76°60°1%⌄
Wind12 mph N
Gusts24 mph
UV index6 – High
Precip chance1%
Sunrise06:37
Sunset19:16
Saturday 12/9 Sunny
81°62°3%⌄
Wind10 mph SE
Gusts17 mph
UV index7 – High
Precip chance3%
Sunrise06:38
Sunset19:14
Sunday 13/9 Sunny
83°64°2%⌄
Wind9 mph S
Gusts18 mph
UV index7 – High
Precip chance2%
Sunrise06:39
Sunset19:12
Monday 14/9 Sunny
88°68°1.0 mm⌄
Wind9 mph SW
Gusts18 mph
UV index8 – Very high
Precip chance57%
Sunrise06:40
Sunset19:11
Tuesday 15/9 Sunny
88°73°2.1 mm⌄
Wind10 mph NW
Gusts18 mph
UV index8 – Very high
Precip chance57%
Sunrise06:41
Sunset19:09
Wednesday 16/9 Sunny
77°57°1%⌄
Wind17 mph N
Gusts24 mph
UV index7 – High
Precip chance1%
Sunrise06:42
Sunset19:07
Thursday 17/9 Rain (climatological)
85°67°15.0 mm⌄
Day≈80–91°
Night≈62–73°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
90°70°20%⌄
Day≈84–95°
Night≈64–75°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
91°71°20%⌄
Day≈85–96°
Night≈65–76°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
85°67°17.0 mm⌄
Day≈80–91°
Night≈62–72°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
85°67°20%⌄
Day≈80–91°
Night≈62–72°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
78°63°20%⌄
Day≈73–84°
Night≈57–68°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
82°65°17.0 mm⌄
Day≈77–88°
Night≈60–71°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
84°66°20%⌄
Day≈79–90°
Night≈61–72°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
89°69°20%⌄
Day≈84–95°
Night≈64–75°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
90°70°29.0 mm⌄
Day≈84–95°
Night≈64–75°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
88°69°20%⌄
Day≈83–94°
Night≈63–74°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
81°65°20%⌄
Day≈76–87°
Night≈59–70°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
82°65°36.0 mm⌄
Day≈76–87°
Night≈60–70°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
84°66°20%⌄
Day≈78–89°
Night≈61–72°
Precip≈11.8 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
72°55°20%⌄
Day≈67–78°
Night≈50–61°
Precip≈11.8 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
76°57°18.0 mm⌄
Day≈70–81°
Night≈52–63°
Precip≈11.8 in / October
(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 Blue Grass, 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.