Prairie du Sac · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Prairie du Sac & 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
31°
Tue, Sep 1
Coldest night
10°
Sat, Sep 12
Days with precip
2 / 14
of 14 forecast days
Nicest day
Sat, Sep 12
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
24° 15°
17% precip chance
Sat 12 – Sun 13 Sep
30° 10°
12% precip chance
Sat 19 – Sun 20 Sep
21° 12°
typical range
Sat 26 – Sun 27 Sep
22° 12°
typical range
30 days — Prairie du Sac
14 forecast + 16 climatology
Mon · Today Mostly cloudy
29°19°0.3 mm⌄
Wind13 mph SW
Gusts40 mph
UV index8 – High
Precip chance37%
Sunrise06:22
Sunset19:36
Tue · Tomorrow Mostly cloudy
31°22°0.6 mm⌄
Wind11 mph SW
Gusts37 mph
UV index7 – High
Precip chance47%
Sunrise06:23
Sunset19:34
Wednesday 2/9 Mostly cloudy
29°21°0.6 mm⌄
Wind9 mph N
Gusts21 mph
UV index6 – Moderate
Precip chance48%
Sunrise06:24
Sunset19:32
Thursday 3/9 Fog
29°21°0.1 mm⌄
Wind11 mph SE
Gusts25 mph
UV index4 – Moderate
Precip chance25%
Sunrise06:25
Sunset19:31
Friday 4/9 Sunny
29°18°7.3 mm⌄
Wind15 mph NE
Gusts23 mph
UV index7 – High
Precip chance78%
Sunrise06:26
Sunset19:29
Saturday 5/9 Mostly cloudy
24°16°17%⌄
Wind9 mph E
Gusts20 mph
UV index6 – High
Precip chance17%
Sunrise06:27
Sunset19:27
Sunday 6/9 Mostly cloudy
24°15°17%⌄
Wind9 mph SE
Gusts18 mph
UV index6 – High
Precip chance17%
Sunrise06:28
Sunset19:25
Monday 7/9 Mostly cloudy
23°16°5.2 mm⌄
Wind14 mph SE
Gusts28 mph
UV index5 – Moderate
Precip chance80%
Sunrise06:29
Sunset19:24
Tuesday 8/9 Fog
26°17°0.2 mm⌄
Wind7 mph SE
Gusts10 mph
UV index7 – High
Precip chance27%
Sunrise06:30
Sunset19:22
Wednesday 9/9 Sunny
28°20°13%⌄
Wind6 mph SE
Gusts11 mph
UV index7 – High
Precip chance13%
Sunrise06:31
Sunset19:20
Thursday 10/9 Sunny
29°18°8%⌄
Wind7 mph SE
Gusts10 mph
UV index7 – High
Precip chance8%
Sunrise06:33
Sunset19:18
Friday 11/9 Fog
28°14°13%⌄
Wind14 mph NE
Gusts29 mph
UV index7 – High
Precip chance13%
Sunrise06:34
Sunset19:16
Saturday 12/9 Sunny
23°10°8%⌄
Wind13 mph NE
Gusts30 mph
UV index6 – High
Precip chance8%
Sunrise06:35
Sunset19:15
Sunday 13/9 Sunny
30°17°12%⌄
Wind9 mph S
Gusts20 mph
UV index7 – High
Precip chance12%
Sunrise06:36
Sunset19:13
Monday 14/9 Rain (climatological)
22°13°2.1 mm⌄
Day≈19–25°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
25°14°20%⌄
Day≈22–28°
Night≈11–17°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
24°14°20%⌄
Day≈21–27°
Night≈11–17°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
24°14°1.9 mm⌄
Day≈21–27°
Night≈11–17°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
21°12°20%⌄
Day≈18–24°
Night≈9–15°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
21°12°20%⌄
Day≈18–24°
Night≈9–15°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
21°12°3.5 mm⌄
Day≈18–24°
Night≈9–15°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
24°14°20%⌄
Day≈21–27°
Night≈11–17°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
24°14°1.6 mm⌄
Day≈21–27°
Night≈11–17°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
23°13°20%⌄
Day≈20–26°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Light rain (climatological)
21°12°1.8 mm⌄
Day≈18–24°
Night≈9–15°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
22°13°20%⌄
Day≈19–25°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
23°13°20%⌄
Day≈20–26°
Night≈10–16°
Precip≈1.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
23°14°2.4 mm⌄
Day≈20–26°
Night≈11–17°
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 Prairie du Sac, 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.