Lakes by the Bay · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Lakes by the Bay & 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
35°
Wed, Sep 9
Coldest night
24°
Sun, Aug 30
Days with precip
9 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
34° 27°
46% precip chance
Sat 12 – Sun 13 Sep
35° 27°
typical range
Sat 19 – Sun 20 Sep
32° 24°
typical range
Sat 26 – Sun 27 Sep
31° 24°
typical range
30 days — Lakes by the Bay
14 forecast + 16 climatology
Sun · Today Partly cloudy
34°24°6.6 mm⌄
Wind12 mph N
Gusts22 mph
UV index11 – Very high
Precip chance71%
Sunrise07:01
Sunset19:42
Mon · Tomorrow Sunny
34°26°1.1 mm⌄
Wind12 mph E
Gusts21 mph
UV index11 – Very high
Precip chance57%
Sunrise07:01
Sunset19:41
Tuesday 1/9 Mostly cloudy
34°28°0.9 mm⌄
Wind14 mph E
Gusts23 mph
UV index11 – Very high
Precip chance45%
Sunrise07:01
Sunset19:40
Wednesday 2/9 Showers
30°26°6.2 mm⌄
Wind10 mph E
Gusts18 mph
UV index11 – Very high
Precip chance80%
Sunrise07:02
Sunset19:39
Thursday 3/9 Mostly cloudy
30°25°2.8 mm⌄
Wind11 mph E
Gusts18 mph
UV index7 – High
Precip chance75%
Sunrise07:02
Sunset19:38
Friday 4/9 Showers
31°26°4.6 mm⌄
Wind11 mph SE
Gusts18 mph
UV index7 – High
Precip chance79%
Sunrise07:03
Sunset19:37
Saturday 5/9 Partly cloudy
34°27°0.2 mm⌄
Wind12 mph E
Gusts21 mph
UV index8 – Very high
Precip chance22%
Sunrise07:03
Sunset19:36
Sunday 6/9 Showers
33°27°0.7 mm⌄
Wind10 mph SE
Gusts21 mph
UV index8 – Very high
Precip chance46%
Sunrise07:03
Sunset19:35
Monday 7/9 Partly cloudy
34°27°0.1 mm⌄
Wind9 mph SE
Gusts21 mph
UV index8 – Very high
Precip chance20%
Sunrise07:04
Sunset19:34
Tuesday 8/9 Sunny
35°27°2.2 mm⌄
Wind11 mph SE
Gusts22 mph
UV index8 – Very high
Precip chance57%
Sunrise07:04
Sunset19:33
Wednesday 9/9 Partly cloudy
35°27°1.1 mm⌄
Wind12 mph S
Gusts13 mph
UV index9 – Very high
Precip chance57%
Sunrise07:04
Sunset19:32
Thursday 10/9 Mostly cloudy
35°27°6.3 mm⌄
Wind10 mph S
Gusts21 mph
UV index8 – Very high
Precip chance73%
Sunrise07:05
Sunset19:31
Friday 11/9 Showers
35°27°0.6 mm⌄
Wind11 mph SW
Gusts18 mph
UV index8 – Very high
Precip chance39%
Sunrise07:05
Sunset19:30
Saturday 12/9 Showers
35°27°17.6 mm⌄
Wind11 mph NE
Gusts17 mph
UV index8 – Very high
Precip chance80%
Sunrise07:06
Sunset19:29
Sunday 13/9 Rain (climatological)
33°27°13.0 mm⌄
Day≈30–36°
Night≈24–30°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
35°28°20%⌄
Day≈32–38°
Night≈25–31°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
35°28°20%⌄
Day≈32–38°
Night≈25–31°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
32°26°13.0 mm⌄
Day≈29–35°
Night≈23–29°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
32°26°20%⌄
Day≈29–35°
Night≈23–29°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
31°25°20%⌄
Day≈28–34°
Night≈22–28°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
29°24°12.2 mm⌄
Day≈26–32°
Night≈21–27°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
32°25°20%⌄
Day≈29–35°
Night≈22–28°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
34°27°20%⌄
Day≈31–37°
Night≈24–30°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Rain (climatological)
35°27°13.7 mm⌄
Day≈32–38°
Night≈24–30°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
34°27°20%⌄
Day≈31–37°
Night≈24–30°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
30°25°20%⌄
Day≈27–33°
Night≈22–28°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Rain (climatological)
28°23°6.7 mm⌄
Day≈25–31°
Night≈20–26°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
30°24°20%⌄
Day≈27–33°
Night≈21–27°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
31°25°20%⌄
Day≈28–34°
Night≈22–28°
Precip≈4.4 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Rain (climatological)
35°27°14.4 mm⌄
Day≈32–38°
Night≈24–30°
Precip≈4.4 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 Lakes by the Bay, 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.