Saint Louis · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Saint Louis & 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
92°
Tue, Sep 1
Coldest night
52°
Sat, Sep 12
Days with precip
3 / 14
of 14 forecast days
Nicest day
Sat, Sep 12
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
77° 55°
8% precip chance
Sat 12 – Sun 13 Sep
87° 52°
7% precip chance
Sat 19 – Sun 20 Sep
69° 51°
typical range
Sat 26 – Sun 27 Sep
72° 51°
typical range
30 days — Saint Louis
14 forecast + 16 climatology
Mon · Today Showers
85°69°3.1 mm⌄
Wind16 mph SW
Gusts28 mph
UV index6 – High
Precip chance73%
Sunrise07:01
Sunset20:16
Tue · Tomorrow Mostly cloudy
92°70°0.7 mm⌄
Wind16 mph SW
Gusts26 mph
UV index6 – Moderate
Precip chance47%
Sunrise07:02
Sunset20:14
Wednesday 2/9 Mostly cloudy
88°74°0.1 mm⌄
Wind10 mph SW
Gusts27 mph
UV index6 – Moderate
Precip chance19%
Sunrise07:03
Sunset20:12
Thursday 3/9 Sunny
88°65°2.1 mm⌄
Wind12 mph NE
Gusts20 mph
UV index7 – High
Precip chance57%
Sunrise07:04
Sunset20:10
Friday 4/9 Mostly cloudy
80°60°7.8 mm⌄
Wind12 mph E
Gusts20 mph
UV index6 – High
Precip chance78%
Sunrise07:05
Sunset20:09
Saturday 5/9 Sunny
75°58°4%⌄
Wind13 mph E
Gusts23 mph
UV index6 – High
Precip chance4%
Sunrise07:06
Sunset20:07
Sunday 6/9 Sunny
77°55°8%⌄
Wind9 mph E
Gusts22 mph
UV index6 – High
Precip chance8%
Sunrise07:08
Sunset20:05
Monday 7/9 Mostly cloudy
78°58°10%⌄
Wind12 mph SE
Gusts20 mph
UV index6 – High
Precip chance10%
Sunrise07:09
Sunset20:03
Tuesday 8/9 Mostly cloudy
77°59°12%⌄
Wind13 mph S
Gusts22 mph
UV index6 – High
Precip chance12%
Sunrise07:10
Sunset20:01
Wednesday 9/9 Sunny
76°65°0.7 mm⌄
Wind10 mph SE
Gusts20 mph
UV index6 – High
Precip chance44%
Sunrise07:11
Sunset20:00
Thursday 10/9 Fog
83°66°14%⌄
Wind8 mph S
Gusts17 mph
UV index7 – High
Precip chance14%
Sunrise07:12
Sunset19:58
Friday 11/9 Sunny
91°58°6%⌄
Wind17 mph NE
Gusts28 mph
UV index8 – Very high
Precip chance6%
Sunrise07:13
Sunset19:56
Saturday 12/9 Sunny
70°52°7%⌄
Wind15 mph NE
Gusts30 mph
UV index6 – High
Precip chance7%
Sunrise07:14
Sunset19:54
Sunday 13/9 Sunny
87°54°3%⌄
Wind9 mph SW
Gusts15 mph
UV index8 – Very high
Precip chance3%
Sunrise07:15
Sunset19:52
Monday 14/9 Rain (climatological)
74°54°2.2 mm⌄
Day≈69–79°
Night≈49–60°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
79°57°20%⌄
Day≈74–84°
Night≈52–63°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
79°57°20%⌄
Day≈73–84°
Night≈52–63°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Rain (climatological)
78°56°2.1 mm⌄
Day≈72–83°
Night≈51–62°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
72°53°20%⌄
Day≈66–77°
Night≈47–58°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
69°51°20%⌄
Day≈64–74°
Night≈46–57°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Rain (climatological)
68°51°2.9 mm⌄
Day≈62–73°
Night≈45–56°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
72°53°20%⌄
Day≈67–78°
Night≈48–59°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
77°56°20%⌄
Day≈71–82°
Night≈51–61°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Rain (climatological)
75°55°3.4 mm⌄
Day≈70–81°
Night≈50–61°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
74°54°20%⌄
Day≈69–79°
Night≈49–60°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
70°52°20%⌄
Day≈64–75°
Night≈46–57°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Rain (climatological)
72°53°3.0 mm⌄
Day≈66–77°
Night≈47–58°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
68°51°20%⌄
Day≈62–73°
Night≈45–56°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
74°54°20%⌄
Day≈69–79°
Night≈49–60°
Precip≈1.3 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Rain (climatological)
75°55°4.3 mm⌄
Day≈70–80°
Night≈49–60°
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 Saint Louis, 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.