Florissant · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Florissant & 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
40°
Tue, Sep 1
Coldest night
15°
Wed, Sep 9
Days with precip
7 / 14
of 14 forecast days
Nicest day
Mon, Sep 14
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
39° 25°
57% precip chance
Sat 12 – Sun 13 Sep
27° 18°
93% precip chance
Sat 19 – Sun 20 Sep
32° 21°
typical range
Sat 26 – Sun 27 Sep
33° 21°
typical range
30 days — Florissant
14 forecast + 16 climatology
Tue · Today Sunny
40°23°2%⌄
Wind10 mph S
Gusts30 mph
UV index8 – Very high
Precip chance2%
Sunrise06:30
Sunset19:31
Wed · Tomorrow Sunny
39°29°1%⌄
Wind10 mph SW
Gusts21 mph
UV index9 – Very high
Precip chance1%
Sunrise06:31
Sunset19:30
Thursday 3/9 Sunny
38°29°2%⌄
Wind9 mph SW
Gusts25 mph
UV index9 – Very high
Precip chance2%
Sunrise06:32
Sunset19:28
Friday 4/9 Sunny
38°29°3%⌄
Wind9 mph SW
Gusts19 mph
UV index8 – Very high
Precip chance3%
Sunrise06:32
Sunset19:27
Saturday 5/9 Sunny
39°28°0.4 mm⌄
Wind11 mph E
Gusts19 mph
UV index7 – High
Precip chance36%
Sunrise06:33
Sunset19:25
Sunday 6/9 Showers
38°25°2.5 mm⌄
Wind13 mph S
Gusts27 mph
UV index8 – Very high
Precip chance57%
Sunrise06:34
Sunset19:24
Monday 7/9 Mostly cloudy
33°25°5.1 mm⌄
Wind11 mph N
Gusts18 mph
UV index7 – High
Precip chance71%
Sunrise06:35
Sunset19:22
Tuesday 8/9 Mostly cloudy
28°18°12.9 mm⌄
Wind12 mph NE
Gusts24 mph
UV index6 – High
Precip chance88%
Sunrise06:36
Sunset19:21
Wednesday 9/9 Mostly cloudy
27°15°3.2 mm⌄
Wind13 mph SE
Gusts32 mph
UV index7 – High
Precip chance75%
Sunrise06:37
Sunset19:19
Thursday 10/9 Sunny
38°24°5%⌄
Wind12 mph SW
Gusts34 mph
UV index8 – Very high
Precip chance5%
Sunrise06:38
Sunset19:17
Friday 11/9 Showers
30°22°1.1 mm⌄
Wind17 mph SW
Gusts36 mph
UV index7 – High
Precip chance57%
Sunrise06:39
Sunset19:16
Saturday 12/9 Showers
27°21°4.2 mm⌄
Wind9 mph SW
Gusts17 mph
UV index6 – High
Precip chance82%
Sunrise06:39
Sunset19:14
Sunday 13/9 Showers
21°18°9.4 mm⌄
Wind7 mph NE
Gusts15 mph
UV index5 – Moderate
Precip chance93%
Sunrise06:40
Sunset19:13
Monday 14/9 Mostly cloudy
24°16°13%⌄
Wind9 mph N
Gusts23 mph
UV index5 – Moderate
Precip chance13%
Sunrise06:41
Sunset19:11
Tuesday 15/9 Rain (climatological)
34°24°8.7 mm⌄
Day≈31–37°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
35°24°20%⌄
Day≈32–38°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Partly cloudy (climatological)
35°24°20%⌄
Day≈32–38°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Rain (climatological)
34°24°8.4 mm⌄
Day≈31–37°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
30°21°20%⌄
Day≈27–33°
Night≈18–24°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Partly cloudy (climatological)
32°22°20%⌄
Day≈29–35°
Night≈19–25°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Rain (climatological)
31°22°10.4 mm⌄
Day≈28–34°
Night≈19–25°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
33°23°20%⌄
Day≈30–36°
Night≈20–26°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Partly cloudy (climatological)
35°24°20%⌄
Day≈32–38°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Rain (climatological)
37°25°9.0 mm⌄
Day≈34–40°
Night≈22–28°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
36°24°20%⌄
Day≈33–39°
Night≈21–27°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Partly cloudy (climatological)
33°23°20%⌄
Day≈30–36°
Night≈20–26°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Rain (climatological)
30°21°9.8 mm⌄
Day≈27–33°
Night≈18–24°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
30°21°20%⌄
Day≈27–33°
Night≈18–24°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Partly cloudy (climatological)
32°22°20%⌄
Day≈29–35°
Night≈19–25°
Precip≈3.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 30/9 Rain (climatological)
37°25°9.2 mm⌄
Day≈34–40°
Night≈22–28°
Precip≈3.3 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 Florissant, 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.