Duncan · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Duncan & 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
36°
Thu, Sep 3
Coldest night
19°
Sat, Aug 22
Days with precip
1 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
33° 19°
47% precip chance
Sat 29 – Sun 30 Aug
35° 23°
9% precip chance
Sat 5 – Sun 6 Sep
34° 21°
typical range
Sat 12 – Sun 13 Sep
32° 21°
typical range
30 days — Duncan
14 forecast + 16 climatology
Fri · Today Mostly cloudy
36°21°0.1 mm⌄
Wind9 mph NE
Gusts18 mph
UV index9 – Very high
Precip chance19%
Sunrise06:53
Sunset20:10
Sat · Tomorrow Showers
31°19°0.8 mm⌄
Wind8 mph SW
Gusts19 mph
UV index9 – Very high
Precip chance47%
Sunrise06:54
Sunset20:08
Sunday 23/8 Sunny
33°22°1%⌄
Wind14 mph N
Gusts22 mph
UV index8 – Very high
Precip chance1%
Sunrise06:54
Sunset20:07
Monday 24/8 Mostly cloudy
33°21°0.1 mm⌄
Wind7 mph SW
Gusts18 mph
UV index9 – Very high
Precip chance17%
Sunrise06:55
Sunset20:06
Tuesday 25/8 Sunny
34°22°0.1 mm⌄
Wind7 mph E
Gusts17 mph
UV index8 – Very high
Precip chance17%
Sunrise06:56
Sunset20:05
Wednesday 26/8 Sunny
33°21°5%⌄
Wind6 mph N
Gusts12 mph
UV index8 – Very high
Precip chance5%
Sunrise06:57
Sunset20:03
Thursday 27/8 Showers
26°21°13.5 mm⌄
Wind7 mph SW
Gusts19 mph
UV index5 – Moderate
Precip chance89%
Sunrise06:57
Sunset20:02
Friday 28/8 Sunny
32°20°7%⌄
Wind6 mph SE
Gusts13 mph
UV index8 – Very high
Precip chance7%
Sunrise06:58
Sunset20:01
Saturday 29/8 Sunny
33°23°4%⌄
Wind7 mph SE
Gusts14 mph
UV index8 – Very high
Precip chance4%
Sunrise06:59
Sunset19:59
Sunday 30/8 Mostly cloudy
35°24°9%⌄
Wind6 mph SW
Gusts10 mph
UV index8 – Very high
Precip chance9%
Sunrise06:59
Sunset19:58
Monday 31/8 Sunny
36°24°3%⌄
Wind7 mph W
Gusts17 mph
UV index9 – Very high
Precip chance3%
Sunrise07:00
Sunset19:57
Tuesday 1/9 Sunny
32°22°5%⌄
Wind10 mph NE
Gusts22 mph
UV index8 – Very high
Precip chance5%
Sunrise07:01
Sunset19:55
Wednesday 2/9 Sunny
35°24°5%⌄
Wind8 mph S
Gusts19 mph
UV index8 – Very high
Precip chance5%
Sunrise07:02
Sunset19:54
Thursday 3/9 Sunny
36°24°2%⌄
Wind9 mph NW
Gusts14 mph
UV index9 – Very high
Precip chance2%
Sunrise07:02
Sunset19:52
Friday 4/9 Rain (climatological)
30°20°2.3 mm⌄
Day≈27–33°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
34°22°20%⌄
Day≈31–37°
Night≈19–25°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Rain (climatological)
32°21°2.1 mm⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
28°18°20%⌄
Day≈25–31°
Night≈15–21°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
26°17°20%⌄
Day≈23–29°
Night≈14–20°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
29°19°4.2 mm⌄
Day≈26–32°
Night≈16–22°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
29°19°20%⌄
Day≈26–32°
Night≈16–22°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
32°21°3.0 mm⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
32°20°20%⌄
Day≈29–35°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
28°18°20%⌄
Day≈25–31°
Night≈15–21°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
28°18°1.8 mm⌄
Day≈25–31°
Night≈15–21°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
27°18°20%⌄
Day≈24–30°
Night≈15–21°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
29°19°20%⌄
Day≈26–32°
Night≈16–22°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
32°21°3.3 mm⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 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 Duncan, 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.