Lyons · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Lyons & 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
112°
Sun, Aug 23
Coldest night
65°
Thu, Aug 27
Days with precip
5 / 14
of 14 forecast days
Nicest day
Thu, Aug 27
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
112° 76°
57% precip chance
Sat 29 – Sun 30 Aug
105° 79°
36% precip chance
Sat 5 – Sun 6 Sep
95° 70°
typical range
Sat 12 – Sun 13 Sep
96° 68°
typical range
30 days — Lyons
14 forecast + 16 climatology
Thu · Today Sunny
98°69°4%⌄
Wind20 mph NE
Gusts28 mph
UV index9 – Very high
Precip chance4%
Sunrise06:51
Sunset20:20
Fri · Tomorrow Sunny
101°69°4%⌄
Wind23 mph NE
Gusts38 mph
UV index9 – Very high
Precip chance4%
Sunrise06:52
Sunset20:19
Saturday 22/8 Mostly cloudy
104°82°1.0 mm⌄
Wind12 mph S
Gusts25 mph
UV index9 – Very high
Precip chance57%
Sunrise06:53
Sunset20:17
Sunday 23/8 Mostly cloudy
112°76°4%⌄
Wind18 mph SW
Gusts34 mph
UV index9 – Very high
Precip chance4%
Sunrise06:54
Sunset20:16
Monday 24/8 Mostly cloudy
98°67°6%⌄
Wind16 mph NE
Gusts27 mph
UV index9 – Very high
Precip chance6%
Sunrise06:55
Sunset20:14
Tuesday 25/8 Mostly cloudy
96°78°0.9 mm⌄
Wind12 mph NE
Gusts21 mph
UV index9 – Very high
Precip chance37%
Sunrise06:56
Sunset20:13
Wednesday 26/8 Showers
86°70°3.9 mm⌄
Wind16 mph NE
Gusts27 mph
UV index7 – High
Precip chance60%
Sunrise06:57
Sunset20:12
Thursday 27/8 Mostly cloudy
83°65°5%⌄
Wind12 mph S
Gusts24 mph
UV index7 – High
Precip chance5%
Sunrise06:58
Sunset20:10
Friday 28/8 Sunny
95°70°0.9 mm⌄
Wind18 mph S
Gusts32 mph
UV index9 – Very high
Precip chance36%
Sunrise06:58
Sunset20:09
Saturday 29/8 Showers
96°79°0.7 mm⌄
Wind18 mph S
Gusts37 mph
UV index8 – Very high
Precip chance36%
Sunrise06:59
Sunset20:07
Sunday 30/8 Sunny
105°80°0.3 mm⌄
Wind17 mph SE
Gusts39 mph
UV index10 – Very high
Precip chance36%
Sunrise07:00
Sunset20:06
Monday 31/8 Mostly cloudy
99°80°2.5 mm⌄
Wind20 mph SE
Gusts35 mph
UV index9 – Very high
Precip chance57%
Sunrise07:01
Sunset20:04
Tuesday 1/9 Sunny
98°77°1.5 mm⌄
Wind21 mph S
Gusts39 mph
UV index9 – Very high
Precip chance57%
Sunrise07:02
Sunset20:03
Wednesday 2/9 Sunny
105°72°2.0 mm⌄
Wind21 mph NE
Gusts32 mph
UV index9 – Very high
Precip chance57%
Sunrise07:03
Sunset20:01
Thursday 3/9 Light rain (climatological)
90°67°1.5 mm⌄
Day≈84–95°
Night≈61–72°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 4/9 Partly cloudy (climatological)
95°70°20%⌄
Day≈89–100°
Night≈65–75°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
94°70°20%⌄
Day≈89–100°
Night≈64–75°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Rain (climatological)
95°70°3.8 mm⌄
Day≈89–100°
Night≈65–75°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
91°68°20%⌄
Day≈86–97°
Night≈62–73°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
87°65°20%⌄
Day≈82–92°
Night≈60–71°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Rain (climatological)
89°67°4.0 mm⌄
Day≈84–94°
Night≈61–72°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
92°68°20%⌄
Day≈87–98°
Night≈63–74°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
98°72°20%⌄
Day≈92–103°
Night≈66–77°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Rain (climatological)
96°70°3.7 mm⌄
Day≈90–101°
Night≈65–76°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
91°68°20%⌄
Day≈86–97°
Night≈62–73°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
89°66°20%⌄
Day≈83–94°
Night≈61–72°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Rain (climatological)
89°67°3.3 mm⌄
Day≈84–95°
Night≈61–72°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
87°65°20%⌄
Day≈82–92°
Night≈60–71°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
89°67°20%⌄
Day≈84–95°
Night≈61–72°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
95°70°2.5 mm⌄
Day≈90–100°
Night≈65–75°
Precip≈1.2 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 Lyons, 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.