Prospect Heights · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Prospect Heights & 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
39°
Wed, Sep 2
Coldest night
18°
Mon, Sep 7
Days with precip
1 / 14
of 14 forecast days
Nicest day
Sun, Sep 6
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
32° 20°
17% precip chance
Sat 12 – Sun 13 Sep
34° 25°
5% precip chance
Sat 19 – Sun 20 Sep
32° 22°
typical range
Sat 26 – Sun 27 Sep
32° 21°
typical range
30 days — Prospect Heights
14 forecast + 16 climatology
Wed · Today Sunny
39°25°5%⌄
Wind11 mph SW
Gusts31 mph
UV index7 – High
Precip chance5%
Sunrise06:18
Sunset19:24
Thu · Tomorrow Sunny
33°25°0.6 mm⌄
Wind10 mph SW
Gusts31 mph
UV index6 – Moderate
Precip chance36%
Sunrise06:19
Sunset19:22
Friday 4/9 Sunny
33°23°0.2 mm⌄
Wind9 mph E
Gusts29 mph
UV index5 – Moderate
Precip chance17%
Sunrise06:20
Sunset19:21
Saturday 5/9 Sunny
32°22°0.1 mm⌄
Wind11 mph NE
Gusts22 mph
UV index7 – High
Precip chance17%
Sunrise06:21
Sunset19:19
Sunday 6/9 Sunny
26°20°5%⌄
Wind11 mph E
Gusts22 mph
UV index7 – High
Precip chance5%
Sunrise06:22
Sunset19:17
Monday 7/9 Sunny
29°18°5%⌄
Wind8 mph SE
Gusts19 mph
UV index7 – High
Precip chance5%
Sunrise06:23
Sunset19:15
Tuesday 8/9 Mostly cloudy
32°21°7%⌄
Wind13 mph SW
Gusts32 mph
UV index8 – Very high
Precip chance7%
Sunrise06:24
Sunset19:14
Wednesday 9/9 Sunny
34°26°7%⌄
Wind14 mph SW
Gusts39 mph
UV index8 – Very high
Precip chance7%
Sunrise06:25
Sunset19:12
Thursday 10/9 Sunny
25°19°1.1 mm⌄
Wind9 mph NE
Gusts20 mph
UV index6 – High
Precip chance57%
Sunrise06:26
Sunset19:10
Friday 11/9 Sunny
34°19°4%⌄
Wind10 mph SW
Gusts28 mph
UV index8 – Very high
Precip chance4%
Sunrise06:27
Sunset19:09
Saturday 12/9 Sunny
34°27°4%⌄
Wind14 mph SW
Gusts31 mph
UV index8 – Very high
Precip chance4%
Sunrise06:28
Sunset19:07
Sunday 13/9 Sunny
34°25°5%⌄
Wind16 mph SW
Gusts35 mph
UV index8 – Very high
Precip chance5%
Sunrise06:29
Sunset19:05
Monday 14/9 Sunny
30°22°1%⌄
Wind7 mph W
Gusts23 mph
UV index8 – Very high
Precip chance1%
Sunrise06:30
Sunset19:03
Tuesday 15/9 Sunny
33°22°2%⌄
Wind7 mph SW
Gusts14 mph
UV index8 – Very high
Precip chance2%
Sunrise06:31
Sunset19:02
Wednesday 16/9 Light rain (climatological)
33°23°1.6 mm⌄
Day≈30–36°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
34°24°20%⌄
Day≈31–37°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
34°23°20%⌄
Day≈31–37°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Light rain (climatological)
32°22°0.8 mm⌄
Day≈29–35°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
32°22°20%⌄
Day≈29–35°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
31°21°20%⌄
Day≈28–34°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Light rain (climatological)
32°22°1.7 mm⌄
Day≈29–35°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
31°22°20%⌄
Day≈28–34°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
34°24°20%⌄
Day≈31–37°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Light rain (climatological)
35°24°1.7 mm⌄
Day≈32–38°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
32°22°20%⌄
Day≈29–35°
Night≈19–25°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
30°21°20%⌄
Day≈27–33°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Light rain (climatological)
30°21°1.0 mm⌄
Day≈27–33°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
30°21°20%⌄
Day≈27–33°
Night≈18–24°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
33°23°20%⌄
Day≈30–36°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Light rain (climatological)
27°17°1.9 mm⌄
Day≈24–30°
Night≈14–20°
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 Prospect Heights, 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.