Mason · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Mason & 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
39°
Sun, Aug 23
Coldest night
21°
Mon, Aug 31
Days with precip
1 / 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
36° 22°
4% precip chance
Sat 5 – Sun 6 Sep
37° 22°
typical range
Sat 12 – Sun 13 Sep
35° 21°
typical range
Sat 19 – Sun 20 Sep
36° 20°
typical range
30 days — Mason
14 forecast + 16 climatology
Sun · Today Sunny
39°25°3%⌄
Wind10 mph S
Gusts24 mph
UV index11 – Very high
Precip chance3%
Sunrise07:08
Sunset20:10
Mon · Tomorrow Sunny
37°24°2%⌄
Wind15 mph S
Gusts28 mph
UV index11 – Very high
Precip chance2%
Sunrise07:08
Sunset20:09
Tuesday 25/8 Sunny
37°22°1%⌄
Wind13 mph S
Gusts28 mph
UV index10 – Very high
Precip chance1%
Sunrise07:09
Sunset20:08
Wednesday 26/8 Sunny
38°22°2%⌄
Wind15 mph S
Gusts27 mph
UV index7 – High
Precip chance2%
Sunrise07:09
Sunset20:07
Thursday 27/8 Partly cloudy
36°25°7.8 mm⌄
Wind24 mph E
Gusts30 mph
UV index9 – Very high
Precip chance63%
Sunrise07:10
Sunset20:06
Friday 28/8 Mostly cloudy
35°23°7%⌄
Wind11 mph S
Gusts25 mph
UV index8 – Very high
Precip chance7%
Sunrise07:11
Sunset20:05
Saturday 29/8 Sunny
35°22°3%⌄
Wind15 mph S
Gusts30 mph
UV index8 – Very high
Precip chance3%
Sunrise07:11
Sunset20:04
Sunday 30/8 Partly cloudy
36°22°4%⌄
Wind15 mph S
Gusts29 mph
UV index9 – Very high
Precip chance4%
Sunrise07:12
Sunset20:02
Monday 31/8 Sunny
35°21°1%⌄
Wind17 mph S
Gusts35 mph
UV index8 – Very high
Precip chance1%
Sunrise07:12
Sunset20:01
Tuesday 1/9 Sunny
36°22°1%⌄
Wind16 mph S
Gusts32 mph
UV index9 – Very high
Precip chance1%
Sunrise07:13
Sunset20:00
Wednesday 2/9 Sunny
36°23°1%⌄
Wind14 mph S
Gusts29 mph
UV index9 – Very high
Precip chance1%
Sunrise07:13
Sunset19:59
Thursday 3/9 Sunny
36°25°1%⌄
Wind14 mph E
Gusts25 mph
UV index9 – Very high
Precip chance1%
Sunrise07:14
Sunset19:58
Friday 4/9 Sunny
38°27°1%⌄
Wind14 mph SE
Gusts26 mph
UV index9 – Very high
Precip chance1%
Sunrise07:15
Sunset19:56
Saturday 5/9 Sunny
37°22°3%⌄
Wind14 mph S
Gusts29 mph
UV index9 – Very high
Precip chance3%
Sunrise07:15
Sunset19:55
Sunday 6/9 Light rain (climatological)
35°22°1.9 mm⌄
Day≈32–38°
Night≈19–25°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 7/9 Partly cloudy (climatological)
37°23°20%⌄
Day≈34–40°
Night≈20–26°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 8/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 9/9 Light rain (climatological)
36°23°0.9 mm⌄
Day≈33–39°
Night≈20–26°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 10/9 Partly cloudy (climatological)
32°20°20%⌄
Day≈29–35°
Night≈17–23°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 11/9 Partly cloudy (climatological)
31°20°20%⌄
Day≈28–34°
Night≈17–23°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 12/9 Light rain (climatological)
34°21°1.1 mm⌄
Day≈31–37°
Night≈18–24°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 13/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 14/9 Partly cloudy (climatological)
36°23°20%⌄
Day≈33–39°
Night≈20–26°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Light rain (climatological)
36°23°1.9 mm⌄
Day≈33–39°
Night≈20–26°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
35°22°20%⌄
Day≈32–38°
Night≈19–25°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
33°21°20%⌄
Day≈30–36°
Night≈18–24°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
33°21°2.1 mm⌄
Day≈30–36°
Night≈18–24°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
31°20°20%⌄
Day≈28–34°
Night≈17–23°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
36°22°20%⌄
Day≈33–39°
Night≈19–25°
Precip≈0.7 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Light rain (climatological)
37°23°1.0 mm⌄
Day≈34–40°
Night≈20–26°
Precip≈0.7 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 Mason, 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.