St Louis weather live forecast

Today's maximum temperature in St Louis is expected to be 36°C. Select a day from the live weather forecast for St Louis, Missouri, USA for more weather parameters.

Tuesday
8th Sep
36

22

11

7
Wednesday
9th Sep
35

26

7

7
Thursday
10th Sep
27

24

3

5
Friday
11th Sep
31

22

9

6
Saturday
12th Sep
33

23

11

7

5-day weather forecast updated at 04:00 on Tuesday 8th September 2026 GMT

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The 5-day weather forecast for Missouri (St Louis) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

St Louis weather forecast by day

Below are the detailed weather forecasts for St Louis for the next 5 days.

St Louis weather for Tuesday 8th September 2026

Expect clear skies in St Louis, Missouri with a maximum temperature of 36°C, high levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the south.

36
°C maximum temperature
22
°C minimum temperature
clear skies
11
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
H
high heat & humidity
5
kph wind from S

St Louis weather for Wednesday 9th September 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 72% chance of some rain and a light breeze of 8 kph from the south.

35
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
7
UV index (High)
72
% chance of some rain
<5
mm of rainfall expected
H
high heat & humidity
8
kph wind from S

St Louis weather for Thursday 10th September 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 85% chance of some rain and little or no wind of 4 kph from the north.

27
°C maximum temperature
24
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
5
UV index (Moderate)
85
% chance of some rain
<20
mm of rainfall expected
L
low heat & humidity
4
kph wind from N

St Louis weather for Friday 11th September 2026

Expect scattered clouds in St Louis, Missouri with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 3 kph from the south-east.

31
°C maximum temperature
22
°C minimum temperature
scattered clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
3
kph wind from SE

St Louis weather for Saturday 12th September 2026

Expect scattered clouds in St Louis, Missouri with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the south-west.