Mount Vernon · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Mount Vernon & 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
39°
Sun, Aug 30
Coldest night
19°
Thu, Aug 27
Days with precip
0 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
39° 20°
5% precip chance
Sat 5 – Sun 6 Sep
36° 25°
4% precip chance
Sat 12 – Sun 13 Sep
36° 23°
typical range
Sat 19 – Sun 20 Sep
36° 23°
typical range
30 days — Mount Vernon
14 forecast + 16 climatology
Thu · Today Sunny
35°19°2%⌄
Wind13 mph N
Gusts22 mph
UV index9 – Very high
Precip chance2%
Sunrise06:42
Sunset19:51
Fri · Tomorrow Sunny
33°20°1%⌄
Wind11 mph NE
Gusts20 mph
UV index8 – Very high
Precip chance1%
Sunrise06:42
Sunset19:50
Saturday 29/8 Mostly cloudy
35°20°5%⌄
Wind15 mph SE
Gusts31 mph
UV index9 – Very high
Precip chance5%
Sunrise06:43
Sunset19:48
Sunday 30/8 Mostly cloudy
39°24°4%⌄
Wind17 mph S
Gusts36 mph
UV index9 – Very high
Precip chance4%
Sunrise06:44
Sunset19:47
Monday 31/8 Sunny
38°26°1%⌄
Wind17 mph SW
Gusts36 mph
UV index9 – Very high
Precip chance1%
Sunrise06:45
Sunset19:45
Tuesday 1/9 Sunny
37°27°2%⌄
Wind15 mph SW
Gusts33 mph
UV index9 – Very high
Precip chance2%
Sunrise06:46
Sunset19:44
Wednesday 2/9 Sunny
37°26°2%⌄
Wind17 mph S
Gusts30 mph
UV index9 – Very high
Precip chance2%
Sunrise06:46
Sunset19:43
Thursday 3/9 Sunny
38°28°2%⌄
Wind18 mph S
Gusts34 mph
UV index9 – Very high
Precip chance2%
Sunrise06:47
Sunset19:41
Friday 4/9 Sunny
37°26°17%⌄
Wind16 mph SW
Gusts28 mph
UV index9 – Very high
Precip chance17%
Sunrise06:48
Sunset19:40
Saturday 5/9 Sunny
36°26°3%⌄
Wind16 mph S
Gusts28 mph
UV index9 – Very high
Precip chance3%
Sunrise06:49
Sunset19:38
Sunday 6/9 Sunny
36°25°4%⌄
Wind14 mph SE
Gusts27 mph
UV index9 – Very high
Precip chance4%
Sunrise06:50
Sunset19:37
Monday 7/9 Sunny
35°25°3%⌄
Wind12 mph S
Gusts28 mph
UV index8 – Very high
Precip chance3%
Sunrise06:51
Sunset19:35
Tuesday 8/9 Sunny
35°27°2%⌄
Wind9 mph SE
Gusts18 mph
UV index9 – Very high
Precip chance2%
Sunrise06:51
Sunset19:34
Wednesday 9/9 Sunny
37°27°2%⌄
Wind13 mph SW
Gusts27 mph
UV index9 – Very high
Precip chance2%
Sunrise06:52
Sunset19:32
Thursday 10/9 Light rain (climatological)
34°22°1.7 mm⌄
Day≈31–37°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
35°23°20%⌄
Day≈32–38°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
36°24°20%⌄
Day≈33–39°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Light rain (climatological)
34°23°1.6 mm⌄
Day≈31–37°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
32°22°20%⌄
Day≈29–35°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
30°20°1.7 mm⌄
Day≈27–33°
Night≈17–23°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
35°23°20%⌄
Day≈32–38°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Light rain (climatological)
36°24°0.8 mm⌄
Day≈33–39°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
36°23°20%⌄
Day≈33–39°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
31°20°1.1 mm⌄
Day≈28–34°
Night≈17–23°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
30°20°20%⌄
Day≈27–33°
Night≈17–23°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
33°22°20%⌄
Day≈30–36°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
36°23°0.9 mm⌄
Day≈33–39°
Night≈20–26°
Precip≈0.6 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 Mount Vernon, 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.