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
85°
Fri, Aug 28
Coldest night
60°
Fri, Aug 21
Days with precip
2 / 14
of 14 forecast days
Nicest day
Wed, Sep 2
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
79° 60°
36% precip chance
Sat 29 – Sun 30 Aug
84° 66°
75% precip chance
Sat 5 – Sun 6 Sep
75° 58°
typical range
Sat 12 – Sun 13 Sep
76° 59°
typical range
30 days — Prospect Heights
14 forecast + 16 climatology
Fri · Today Sunny
84°60°17%⌄
Wind8 mph SW
Gusts20 mph
UV index6 – High
Precip chance17%
Sunrise06:05
Sunset19:43
Sat · Tomorrow Sunny
79°62°0.4 mm⌄
Wind14 mph NW
Gusts27 mph
UV index7 – High
Precip chance36%
Sunrise06:06
Sunset19:42
Sunday 23/8 Sunny
75°60°3%⌄
Wind9 mph NE
Gusts19 mph
UV index7 – High
Precip chance3%
Sunrise06:07
Sunset19:40
Monday 24/8 Mostly cloudy
77°60°0.2 mm⌄
Wind7 mph E
Gusts17 mph
UV index8 – High
Precip chance22%
Sunrise06:09
Sunset19:39
Tuesday 25/8 Partly cloudy
80°64°0.2 mm⌄
Wind8 mph SW
Gusts19 mph
UV index7 – High
Precip chance17%
Sunrise06:10
Sunset19:37
Wednesday 26/8 Sunny
84°67°2.6 mm⌄
Wind11 mph SW
Gusts23 mph
UV index7 – High
Precip chance63%
Sunrise06:11
Sunset19:36
Thursday 27/8 Sunny
78°64°6%⌄
Wind7 mph N
Gusts19 mph
UV index7 – High
Precip chance6%
Sunrise06:12
Sunset19:34
Friday 28/8 Sunny
85°65°7%⌄
Wind6 mph S
Gusts19 mph
UV index7 – High
Precip chance7%
Sunrise06:13
Sunset19:32
Saturday 29/8 Showers
84°66°6.0 mm⌄
Wind10 mph S
Gusts32 mph
UV index7 – High
Precip chance75%
Sunrise06:14
Sunset19:31
Sunday 30/8 Sunny
81°67°4%⌄
Wind10 mph N
Gusts25 mph
UV index7 – High
Precip chance4%
Sunrise06:15
Sunset19:29
Monday 31/8 Mostly cloudy
74°67°0.1 mm⌄
Wind6 mph SE
Gusts18 mph
UV index6 – High
Precip chance17%
Sunrise06:16
Sunset19:27
Tuesday 1/9 Mostly cloudy
85°68°0.5 mm⌄
Wind11 mph SW
Gusts23 mph
UV index6 – High
Precip chance37%
Sunrise06:17
Sunset19:26
Wednesday 2/9 Sunny
73°62°5%⌄
Wind11 mph NE
Gusts23 mph
UV index6 – High
Precip chance5%
Sunrise06:18
Sunset19:24
Thursday 3/9 Mostly cloudy
67°60°9%⌄
Wind12 mph NE
Gusts18 mph
UV index5 – Moderate
Precip chance9%
Sunrise06:19
Sunset19:22
Friday 4/9 Rain (climatological)
73°58°2.3 mm⌄
Day≈68–79°
Night≈53–64°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
75°59°20%⌄
Day≈70–80°
Night≈54–65°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
74°58°20%⌄
Day≈68–79°
Night≈53–64°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Light rain (climatological)
71°57°1.2 mm⌄
Day≈65–76°
Night≈51–62°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
71°56°20%⌄
Day≈65–76°
Night≈51–62°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
69°55°20%⌄
Day≈63–74°
Night≈50–61°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
70°56°2.5 mm⌄
Day≈65–76°
Night≈51–62°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
69°56°20%⌄
Day≈64–75°
Night≈50–61°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
75°59°20%⌄
Day≈70–81°
Night≈54–65°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
76°60°2.5 mm⌄
Day≈71–82°
Night≈55–65°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
71°57°20%⌄
Day≈66–77°
Night≈52–62°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈62–72°
Night≈49–60°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Light rain (climatological)
67°54°1.5 mm⌄
Day≈61–72°
Night≈49–60°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
67°54°20%⌄
Day≈61–72°
Night≈49–60°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
72°58°20%⌄
Day≈67–78°
Night≈52–63°
Precip≈0.9 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
74°59°2.7 mm⌄
Day≈69–80°
Night≈53–64°
Precip≈0.9 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 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.