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
90°
Wed, Sep 9
Coldest night
54°
Sat, Sep 12
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
75° 60°
87% precip chance
Sat 12 – Sun 13 Sep
80° 54°
19% precip chance
Sat 19 – Sun 20 Sep
77° 62°
typical range
Sat 26 – Sun 27 Sep
79° 62°
typical range
30 days — Prairie du Sac
14 forecast + 16 climatology
Tue · Today Mostly cloudy
86°69°22%⌄
Wind7 mph SW
Gusts14 mph
UV index6 – High
Precip chance22%
Sunrise06:23
Sunset19:34
Wed · Tomorrow Sunny
84°75°0.2 mm⌄
Wind12 mph S
Gusts37 mph
UV index6 – High
Precip chance19%
Sunrise06:24
Sunset19:32
Thursday 3/9 Showers
80°71°0.5 mm⌄
Wind8 mph E
Gusts14 mph
UV index6 – Moderate
Precip chance49%
Sunrise06:25
Sunset19:31
Friday 4/9 Showers
82°67°8.3 mm⌄
Wind14 mph E
Gusts29 mph
UV index7 – High
Precip chance85%
Sunrise06:26
Sunset19:29
Saturday 5/9 Fog
75°64°36.8 mm⌄
Wind12 mph N
Gusts21 mph
UV index6 – High
Precip chance87%
Sunrise06:27
Sunset19:27
Sunday 6/9 Fog
75°60°17%⌄
Wind9 mph SE
Gusts23 mph
UV index6 – High
Precip chance17%
Sunrise06:28
Sunset19:25
Monday 7/9 Mostly cloudy
79°61°19%⌄
Wind13 mph SW
Gusts22 mph
UV index7 – High
Precip chance19%
Sunrise06:29
Sunset19:24
Tuesday 8/9 Sunny
89°71°6%⌄
Wind7 mph E
Gusts16 mph
UV index8 – Very high
Precip chance6%
Sunrise06:30
Sunset19:22
Wednesday 9/9 Sunny
90°68°11%⌄
Wind19 mph NW
Gusts34 mph
UV index8 – Very high
Precip chance11%
Sunrise06:31
Sunset19:20
Thursday 10/9 Mostly cloudy
75°62°8%⌄
Wind15 mph N
Gusts33 mph
UV index6 – High
Precip chance8%
Sunrise06:33
Sunset19:18
Friday 11/9 Sunny
73°55°3%⌄
Wind11 mph NW
Gusts18 mph
UV index6 – High
Precip chance3%
Sunrise06:34
Sunset19:16
Saturday 12/9 Sunny
74°54°4%⌄
Wind12 mph SE
Gusts29 mph
UV index6 – High
Precip chance4%
Sunrise06:35
Sunset19:15
Sunday 13/9 Mostly cloudy
80°62°0.1 mm⌄
Wind20 mph SW
Gusts42 mph
UV index6 – High
Precip chance19%
Sunrise06:36
Sunset19:13
Monday 14/9 Sunny
71°54°1.1 mm⌄
Wind17 mph NW
Gusts34 mph
UV index6 – High
Precip chance57%
Sunrise06:37
Sunset19:11
Tuesday 15/9 Rain (climatological)
78°63°6.8 mm⌄
Day≈73–83°
Night≈58–68°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
83°66°20%⌄
Day≈78–89°
Night≈61–72°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
82°65°20%⌄
Day≈76–87°
Night≈60–71°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
82°65°6.1 mm⌄
Day≈76–87°
Night≈60–71°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
77°62°20%⌄
Day≈71–82°
Night≈57–67°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
77°63°20%⌄
Day≈72–83°
Night≈57–68°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
76°62°11.6 mm⌄
Day≈71–82°
Night≈56–67°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
78°63°20%⌄
Day≈73–83°
Night≈58–68°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
81°65°20%⌄
Day≈76–87°
Night≈59–70°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
82°65°5.1 mm⌄
Day≈77–88°
Night≈60–71°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
80°64°20%⌄
Day≈74–85°
Night≈59–69°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
79°64°20%⌄
Day≈73–84°
Night≈58–69°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
76°62°5.8 mm⌄
Day≈71–82°
Night≈56–67°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
78°63°20%⌄
Day≈73–83°
Night≈58–68°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
80°64°20%⌄
Day≈74–85°
Night≈58–69°
Precip≈4.0 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
81°65°7.8 mm⌄
Day≈76–86°
Night≈59–70°
Precip≈4.0 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.