Bay · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
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
42°
Wed, Sep 2
Coldest night
20°
Tue, Sep 1
Days with precip
5 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 22 – Sun 23 Aug
36° 21°
57% precip chance
Sat 29 – Sun 30 Aug
38° 25°
4% precip chance
Sat 5 – Sun 6 Sep
35° 21°
typical range
Sat 12 – Sun 13 Sep
36° 22°
typical range
30 days — Bay
14 forecast + 16 climatology
Fri · Today Sunny
37°23°4%⌄
Wind10 mph N
Gusts19 mph
UV index9 – Very high
Precip chance4%
Sunrise06:25
Sunset19:44
Sat · Tomorrow Sunny
36°22°2.2 mm⌄
Wind9 mph E
Gusts21 mph
UV index8 – Very high
Precip chance57%
Sunrise06:26
Sunset19:43
Sunday 23/8 Mostly cloudy
35°21°0.2 mm⌄
Wind9 mph NE
Gusts21 mph
UV index9 – Very high
Precip chance19%
Sunrise06:27
Sunset19:42
Monday 24/8 Showers
26°21°21.2 mm⌄
Wind14 mph S
Gusts30 mph
UV index3 – Low
Precip chance90%
Sunrise06:28
Sunset19:41
Tuesday 25/8 Sunny
37°22°0.1 mm⌄
Wind18 mph SW
Gusts32 mph
UV index9 – Very high
Precip chance17%
Sunrise06:29
Sunset19:39
Wednesday 26/8 Sunny
36°22°18.4 mm⌄
Wind19 mph N
Gusts29 mph
UV index8 – Very high
Precip chance77%
Sunrise06:29
Sunset19:38
Thursday 27/8 Sunny
33°21°2.3 mm⌄
Wind11 mph SW
Gusts16 mph
UV index8 – Very high
Precip chance58%
Sunrise06:30
Sunset19:37
Friday 28/8 Sunny
35°25°7%⌄
Wind10 mph S
Gusts18 mph
UV index8 – Very high
Precip chance7%
Sunrise06:31
Sunset19:35
Saturday 29/8 Sunny
37°25°4%⌄
Wind11 mph SW
Gusts27 mph
UV index9 – Very high
Precip chance4%
Sunrise06:32
Sunset19:34
Sunday 30/8 Sunny
38°26°2%⌄
Wind12 mph S
Gusts32 mph
UV index9 – Very high
Precip chance2%
Sunrise06:32
Sunset19:32
Monday 31/8 Sunny
38°26°1%⌄
Wind17 mph S
Gusts34 mph
UV index9 – Very high
Precip chance1%
Sunrise06:33
Sunset19:31
Tuesday 1/9 Sunny
38°20°2.8 mm⌄
Wind20 mph S
Gusts31 mph
UV index9 – Very high
Precip chance57%
Sunrise06:34
Sunset19:30
Wednesday 2/9 Sunny
42°26°2%⌄
Wind12 mph NE
Gusts16 mph
UV index10 – Very high
Precip chance2%
Sunrise06:35
Sunset19:28
Thursday 3/9 Sunny
41°23°1%⌄
Wind10 mph NE
Gusts25 mph
UV index10 – Very high
Precip chance1%
Sunrise06:35
Sunset19:27
Friday 4/9 Rain (climatological)
34°21°12.0 mm⌄
Day≈31–37°
Night≈18–24°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 5/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 6/9 Partly cloudy (climatological)
35°21°20%⌄
Day≈32–38°
Night≈18–24°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Rain (climatological)
34°21°11.7 mm⌄
Day≈31–37°
Night≈18–24°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
32°20°20%⌄
Day≈29–35°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Partly cloudy (climatological)
32°20°20%⌄
Day≈29–35°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Rain (climatological)
30°19°9.6 mm⌄
Day≈27–33°
Night≈16–22°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
33°20°20%⌄
Day≈30–36°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Rain (climatological)
36°22°6.9 mm⌄
Day≈33–39°
Night≈19–25°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
34°21°20%⌄
Day≈31–37°
Night≈18–24°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
33°20°20%⌄
Day≈30–36°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Rain (climatological)
32°20°13.0 mm⌄
Day≈29–35°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
32°20°20%⌄
Day≈29–35°
Night≈17–23°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
34°21°20%⌄
Day≈31–37°
Night≈18–24°
Precip≈4.1 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Rain (climatological)
35°22°10.6 mm⌄
Day≈32–38°
Night≈19–25°
Precip≈4.1 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 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.