Hidden Valley Lake · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Hidden Valley Lake & 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°
Sun, Sep 13
Coldest night
8°
Fri, Sep 4
Days with precip
0 / 14
of 14 forecast days
Nicest day
Sat, Sep 5
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
24° 12°
3% precip chance
Sat 12 – Sun 13 Sep
31° 14°
2% precip chance
Sat 19 – Sun 20 Sep
29° 15°
typical range
Sat 26 – Sun 27 Sep
30° 14°
typical range
30 days — Hidden Valley Lake
14 forecast + 16 climatology
Fri · Today Sunny
22°8°0.2 mm⌄
Wind11 mph SW
Gusts21 mph
UV index8 – High
Precip chance17%
Sunrise06:42
Sunset19:36
Sat · Tomorrow Sunny
24°12°3%⌄
Wind9 mph SW
Gusts20 mph
UV index7 – High
Precip chance3%
Sunrise06:42
Sunset19:34
Sunday 6/9 Sunny
24°12°2%⌄
Wind10 mph SW
Gusts19 mph
UV index7 – High
Precip chance2%
Sunrise06:43
Sunset19:33
Monday 7/9 Sunny
27°12°2%⌄
Wind7 mph SW
Gusts18 mph
UV index7 – High
Precip chance2%
Sunrise06:44
Sunset19:31
Tuesday 8/9 Sunny
25°13°5%⌄
Wind10 mph SW
Gusts17 mph
UV index6 – High
Precip chance5%
Sunrise06:45
Sunset19:30
Wednesday 9/9 Mostly cloudy
23°10°8%⌄
Wind8 mph S
Gusts17 mph
UV index5 – Moderate
Precip chance8%
Sunrise06:46
Sunset19:28
Thursday 10/9 Sunny
26°12°3%⌄
Wind7 mph SW
Gusts19 mph
UV index7 – High
Precip chance3%
Sunrise06:47
Sunset19:27
Friday 11/9 Mostly cloudy
25°14°6%⌄
Wind11 mph SW
Gusts15 mph
UV index7 – High
Precip chance6%
Sunrise06:48
Sunset19:25
Saturday 12/9 Sunny
28°14°2%⌄
Wind4 mph NW
Gusts15 mph
UV index7 – High
Precip chance2%
Sunrise06:49
Sunset19:23
Sunday 13/9 Sunny
31°19°1%⌄
Wind10 mph SW
Gusts21 mph
UV index8 – Very high
Precip chance1%
Sunrise06:50
Sunset19:22
Monday 14/9 Sunny
30°18°1%⌄
Wind9 mph SW
Gusts18 mph
UV index8 – Very high
Precip chance1%
Sunrise06:50
Sunset19:20
Tuesday 15/9 Sunny
28°15°1%⌄
Wind6 mph N
Gusts14 mph
UV index7 – High
Precip chance1%
Sunrise06:51
Sunset19:19
Wednesday 16/9 Sunny
26°15°0%⌄
Wind18 mph N
Gusts37 mph
UV index7 – High
Precip chance0%
Sunrise06:52
Sunset19:17
Thursday 17/9 Sunny
29°18°0%⌄
Wind10 mph N
Gusts28 mph
UV index7 – High
Precip chance0%
Sunrise06:53
Sunset19:15
Friday 18/9 Light rain (climatological)
25°13°1.9 mm⌄
Day≈22–28°
Night≈10–16°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
29°15°20%⌄
Day≈26–32°
Night≈12–18°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
29°15°20%⌄
Day≈26–32°
Night≈12–18°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Light rain (climatological)
27°14°1.2 mm⌄
Day≈24–30°
Night≈11–17°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
26°14°20%⌄
Day≈23–29°
Night≈11–17°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
25°13°20%⌄
Day≈22–28°
Night≈10–16°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Light rain (climatological)
23°12°0.9 mm⌄
Day≈20–26°
Night≈9–15°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
28°14°20%⌄
Day≈25–31°
Night≈11–17°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
27°14°20%⌄
Day≈24–30°
Night≈11–17°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Light rain (climatological)
30°16°1.7 mm⌄
Day≈27–33°
Night≈13–19°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
28°15°20%⌄
Day≈25–31°
Night≈12–18°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
24°12°20%⌄
Day≈21–27°
Night≈9–15°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Light rain (climatological)
25°13°1.5 mm⌄
Day≈22–28°
Night≈10–16°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
19°7°20%⌄
Day≈16–22°
Night≈4–10°
Precip≈0.6 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Partly cloudy (climatological)
21°9°20%⌄
Day≈18–24°
Night≈6–12°
Precip≈0.6 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Light rain (climatological)
23°10°1.7 mm⌄
Day≈20–26°
Night≈7–13°
Precip≈0.6 in / October
(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 Hidden Valley Lake, 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.