Chatham · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Chatham & 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
41°
Sun, Sep 6
Coldest night
16°
Thu, Sep 10
Days with precip
2 / 14
of 14 forecast days
Nicest day
Fri, Aug 28
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 29 – Sun 30 Aug
34° 17°
15% precip chance
Sat 5 – Sun 6 Sep
41° 28°
1% precip chance
Sat 12 – Sun 13 Sep
35° 22°
typical range
Sat 19 – Sun 20 Sep
35° 21°
typical range
30 days — Chatham
14 forecast + 16 climatology
Fri · Today Sunny
28°17°6%⌄
Wind7 mph SE
Gusts16 mph
UV index7 – High
Precip chance6%
Sunrise06:23
Sunset19:36
Sat · Tomorrow Mostly cloudy
26°17°15%⌄
Wind9 mph SE
Gusts23 mph
UV index6 – High
Precip chance15%
Sunrise06:24
Sunset19:35
Sunday 30/8 Mostly cloudy
34°20°8%⌄
Wind16 mph S
Gusts39 mph
UV index8 – Very high
Precip chance8%
Sunrise06:25
Sunset19:33
Monday 31/8 Mostly cloudy
36°25°7%⌄
Wind17 mph S
Gusts40 mph
UV index9 – Very high
Precip chance7%
Sunrise06:26
Sunset19:32
Tuesday 1/9 Sunny
39°26°1%⌄
Wind17 mph S
Gusts41 mph
UV index9 – Very high
Precip chance1%
Sunrise06:27
Sunset19:30
Wednesday 2/9 Sunny
40°28°1%⌄
Wind15 mph SW
Gusts36 mph
UV index9 – Very high
Precip chance1%
Sunrise06:28
Sunset19:29
Thursday 3/9 Sunny
40°28°3%⌄
Wind13 mph SW
Gusts38 mph
UV index9 – Very high
Precip chance3%
Sunrise06:28
Sunset19:27
Friday 4/9 Sunny
39°28°1%⌄
Wind16 mph S
Gusts29 mph
UV index9 – Very high
Precip chance1%
Sunrise06:29
Sunset19:25
Saturday 5/9 Sunny
40°28°1%⌄
Wind13 mph SW
Gusts28 mph
UV index10 – Very high
Precip chance1%
Sunrise06:30
Sunset19:24
Sunday 6/9 Sunny
41°28°1%⌄
Wind9 mph W
Gusts16 mph
UV index10 – Very high
Precip chance1%
Sunrise06:31
Sunset19:22
Monday 7/9 Sunny
39°27°3%⌄
Wind12 mph S
Gusts29 mph
UV index9 – Very high
Precip chance3%
Sunrise06:32
Sunset19:21
Tuesday 8/9 Mostly cloudy
35°26°0.1 mm⌄
Wind15 mph SW
Gusts35 mph
UV index8 – Very high
Precip chance17%
Sunrise06:33
Sunset19:19
Wednesday 9/9 Showers
36°21°11.4 mm⌄
Wind10 mph E
Gusts22 mph
UV index8 – Very high
Precip chance80%
Sunrise06:34
Sunset19:17
Thursday 10/9 Showers
23°16°4.2 mm⌄
Wind13 mph N
Gusts19 mph
UV index4 – Moderate
Precip chance84%
Sunrise06:35
Sunset19:16
Friday 11/9 Rain (climatological)
33°21°3.6 mm⌄
Day≈30–36°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Partly cloudy (climatological)
34°22°20%⌄
Day≈31–37°
Night≈19–25°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
35°23°20%⌄
Day≈32–38°
Night≈20–26°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Rain (climatological)
33°21°2.3 mm⌄
Day≈30–36°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
28°18°20%⌄
Day≈25–31°
Night≈15–21°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
30°20°2.2 mm⌄
Day≈27–33°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
30°20°20%⌄
Day≈27–33°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
32°21°20%⌄
Day≈29–35°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
35°22°4.1 mm⌄
Day≈32–38°
Night≈19–25°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
31°20°20%⌄
Day≈28–34°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
30°19°20%⌄
Day≈27–33°
Night≈16–22°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
30°20°3.1 mm⌄
Day≈27–33°
Night≈17–23°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
28°19°20%⌄
Day≈25–31°
Night≈16–22°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
33°21°20%⌄
Day≈30–36°
Night≈18–24°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
33°22°3.2 mm⌄
Day≈30–36°
Night≈19–25°
Precip≈1.3 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 Chatham, 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.