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
94°
Wed, Sep 16
Coldest night
49°
Fri, Sep 4
Days with precip
4 / 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
77° 53°
5% precip chance
Sat 12 – Sun 13 Sep
77° 52°
11% precip chance
Sat 19 – Sun 20 Sep
80° 57°
typical range
Sat 26 – Sun 27 Sep
82° 58°
typical range
30 days — Hidden Valley Lake
14 forecast + 16 climatology
Thu · Today Showers
64°53°51.6 mm⌄
Wind5 mph SW
Gusts15 mph
UV index0 – Low
Precip chance88%
Sunrise06:41
Sunset19:38
Fri · Tomorrow Sunny
72°49°14.0 mm⌄
Wind11 mph SW
Gusts17 mph
UV index8 – High
Precip chance62%
Sunrise06:42
Sunset19:36
Saturday 5/9 Sunny
77°53°5%⌄
Wind9 mph SW
Gusts18 mph
UV index7 – High
Precip chance5%
Sunrise06:42
Sunset19:34
Sunday 6/9 Sunny
74°53°2%⌄
Wind10 mph SW
Gusts21 mph
UV index7 – High
Precip chance2%
Sunrise06:43
Sunset19:33
Monday 7/9 Sunny
79°52°2%⌄
Wind7 mph SW
Gusts18 mph
UV index7 – High
Precip chance2%
Sunrise06:44
Sunset19:31
Tuesday 8/9 Sunny
75°56°5%⌄
Wind9 mph SW
Gusts14 mph
UV index6 – High
Precip chance5%
Sunrise06:45
Sunset19:30
Wednesday 9/9 Mostly cloudy
76°54°6%⌄
Wind9 mph S
Gusts16 mph
UV index5 – Moderate
Precip chance6%
Sunrise06:46
Sunset19:28
Thursday 10/9 Mostly cloudy
67°62°2.4 mm⌄
Wind5 mph E
Gusts14 mph
UV index4 – Moderate
Precip chance65%
Sunrise06:47
Sunset19:27
Friday 11/9 Showers
60°54°16.6 mm⌄
Wind6 mph SE
Gusts19 mph
UV index3 – Moderate
Precip chance94%
Sunrise06:48
Sunset19:25
Saturday 12/9 Sunny
70°52°11%⌄
Wind9 mph SW
Gusts15 mph
UV index6 – High
Precip chance11%
Sunrise06:49
Sunset19:23
Sunday 13/9 Sunny
77°58°3%⌄
Wind7 mph SW
Gusts16 mph
UV index7 – High
Precip chance3%
Sunrise06:50
Sunset19:22
Monday 14/9 Sunny
85°62°1%⌄
Wind5 mph N
Gusts16 mph
UV index7 – High
Precip chance1%
Sunrise06:50
Sunset19:20
Tuesday 15/9 Sunny
86°67°1%⌄
Wind6 mph SW
Gusts14 mph
UV index7 – High
Precip chance1%
Sunrise06:51
Sunset19:19
Wednesday 16/9 Sunny
94°70°0%⌄
Wind6 mph SW
Gusts17 mph
UV index8 – Very high
Precip chance0%
Sunrise06:52
Sunset19:17
Thursday 17/9 Rain (climatological)
73°55°23.3 mm⌄
Day≈68–79°
Night≈50–61°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
80°59°20%⌄
Day≈74–85°
Night≈54–65°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
80°60°20%⌄
Day≈75–86°
Night≈54–65°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
76°57°14.7 mm⌄
Day≈70–81°
Night≈51–62°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
75°56°20%⌄
Day≈70–81°
Night≈51–62°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
73°55°20%⌄
Day≈67–78°
Night≈49–60°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
69°53°10.4 mm⌄
Day≈64–75°
Night≈48–58°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
78°58°20%⌄
Day≈72–83°
Night≈53–63°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
77°58°20%⌄
Day≈71–82°
Night≈52–63°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
82°61°20.2 mm⌄
Day≈77–87°
Night≈55–66°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
78°58°20%⌄
Day≈73–84°
Night≈53–64°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
72°54°20%⌄
Day≈66–77°
Night≈49–60°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
73°55°17.8 mm⌄
Day≈68–79°
Night≈50–61°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
72°55°20%⌄
Day≈67–78°
Night≈49–60°
Precip≈7.2 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
66°48°20%⌄
Day≈61–72°
Night≈42–53°
Precip≈7.2 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
70°50°20.9 mm⌄
Day≈64–75°
Night≈44–55°
Precip≈7.2 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.