Heritage Lake · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Heritage 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
92°
Fri, Sep 18
Coldest night
52°
Tue, Sep 15
Days with precip
6 / 14
of 14 forecast days
Nicest day
Fri, Sep 11
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 12 – Sun 13 Sep
83° 65°
74% precip chance
Sat 19 – Sun 20 Sep
89° 64°
typical range
Sat 26 – Sun 27 Sep
79° 61°
typical range
Sat 3 – Sun 4 Oct
71° 50°
typical range
30 days — Heritage Lake
14 forecast + 16 climatology
Sun · Today Sunny
82°65°7%⌄
Wind12 mph NE
Gusts26 mph
UV index8 – High
Precip chance7%
Sunrise07:19
Sunset20:10
Mon · Tomorrow Sunny
76°60°11%⌄
Wind11 mph NE
Gusts21 mph
UV index7 – High
Precip chance11%
Sunrise07:20
Sunset20:09
Tuesday 8/9 Mostly cloudy
86°65°17%⌄
Wind9 mph SE
Gusts22 mph
UV index7 – High
Precip chance17%
Sunrise07:21
Sunset20:07
Wednesday 9/9 Sunny
89°74°6%⌄
Wind15 mph SW
Gusts39 mph
UV index8 – High
Precip chance6%
Sunrise07:22
Sunset20:05
Thursday 10/9 Mostly cloudy
75°65°25.3 mm⌄
Wind11 mph W
Gusts27 mph
UV index5 – Moderate
Precip chance89%
Sunrise07:23
Sunset20:04
Friday 11/9 Sunny
76°63°9%⌄
Wind8 mph SE
Gusts13 mph
UV index6 – High
Precip chance9%
Sunrise07:24
Sunset20:02
Saturday 12/9 Mostly cloudy
83°65°2.9 mm⌄
Wind14 mph S
Gusts26 mph
UV index6 – High
Precip chance69%
Sunrise07:25
Sunset20:01
Sunday 13/9 Sunny
83°69°5.3 mm⌄
Wind18 mph SW
Gusts30 mph
UV index7 – High
Precip chance74%
Sunrise07:26
Sunset19:59
Monday 14/9 Showers
72°54°5.8 mm⌄
Wind12 mph N
Gusts22 mph
UV index4 – Moderate
Precip chance91%
Sunrise07:27
Sunset19:57
Tuesday 15/9 Sunny
70°52°0.7 mm⌄
Wind13 mph N
Gusts25 mph
UV index6 – High
Precip chance39%
Sunrise07:28
Sunset19:56
Wednesday 16/9 Sunny
77°54°6%⌄
Wind9 mph SE
Gusts21 mph
UV index6 – High
Precip chance6%
Sunrise07:29
Sunset19:54
Thursday 17/9 Showers
74°63°8.5 mm⌄
Wind12 mph SE
Gusts26 mph
UV index5 – Moderate
Precip chance80%
Sunrise07:29
Sunset19:52
Friday 18/9 Showers
92°73°1.0 mm⌄
Wind10 mph SW
Gusts30 mph
UV index8 – Very high
Precip chance49%
Sunrise07:30
Sunset19:51
Saturday 19/9 Sunny
89°73°2.5 mm⌄
Wind9 mph S
Gusts24 mph
UV index8 – Very high
Precip chance58%
Sunrise07:31
Sunset19:49
Sunday 20/9 Rain (climatological)
81°64°6.3 mm⌄
Day≈76–87°
Night≈59–70°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
83°65°20%⌄
Day≈78–89°
Night≈60–71°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
84°66°20%⌄
Day≈79–90°
Night≈61–72°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
80°64°10.8 mm⌄
Day≈74–85°
Night≈58–69°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
80°64°20%⌄
Day≈75–86°
Night≈58–69°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
77°62°20%⌄
Day≈71–82°
Night≈56–67°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
76°61°13.1 mm⌄
Day≈71–82°
Night≈56–67°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
79°63°20%⌄
Day≈73–84°
Night≈58–68°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
82°65°20%⌄
Day≈77–87°
Night≈59–70°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
83°65°13.8 mm⌄
Day≈78–88°
Night≈60–71°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Partly cloudy (climatological)
85°66°20%⌄
Day≈79–90°
Night≈61–72°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 1/10 Partly cloudy (climatological)
66°52°20%⌄
Day≈61–72°
Night≈46–57°
Precip≈4.4 in / October
(climatological)Typical range for these dates · 1991–2020
Friday 2/10 Rain (climatological)
67°52°9.7 mm⌄
Day≈62–73°
Night≈47–58°
Precip≈4.4 in / October
(climatological)Typical range for these dates · 1991–2020
Saturday 3/10 Partly cloudy (climatological)
63°50°20%⌄
Day≈58–69°
Night≈44–55°
Precip≈4.4 in / October
(climatological)Typical range for these dates · 1991–2020
Sunday 4/10 Partly cloudy (climatological)
71°54°20%⌄
Day≈65–76°
Night≈49–60°
Precip≈4.4 in / October
(climatological)Typical range for these dates · 1991–2020
Monday 5/10 Rain (climatological)
70°54°14.9 mm⌄
Day≈65–76°
Night≈49–59°
Precip≈4.4 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 Heritage 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.