St Louis weather live forecast

Today's maximum temperature in St Louis is expected to be 21°C. Select a day from the live weather forecast for St Louis, Missouri, USA for more weather parameters.

Thursday
21st May
21

15

6

UV6
Friday
22nd May
18

16

0

UV3
Saturday
23rd May
26

16

5

UV4
Sunday
24th May
25

20

3

UV7
Monday
25th May
27

19

2

UV2

5-day weather forecast updated at 04:00 on Thursday 21st May 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 Thursday 21st May 2026

Expect broken clouds in St Louis, Missouri with a maximum temperature of 21°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the east.

21
°C maximum temperature
15
°C minimum temperature
broken clouds
6
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
21
°C wind chill
4
kph wind from E

St Louis weather for Friday 22nd May 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 71% chance of some rain and little or no wind of 4 kph from the north-east.

18
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
UV3
UV index (Moderate)
71
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
4
kph wind from NE

St Louis weather for Saturday 23rd May 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 46% chance of some rain and little or no wind of 1 kph from the west.

26
°C maximum temperature
16
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
UV4
UV index (Moderate)
46
% chance of some rain
<2
mm of rainfall expected
L
low heat & humidity
1
kph wind from W

St Louis weather for Sunday 24th May 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 25°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 41% chance of some rain and little or no wind of 0 kph from the north-east.

25
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
UV7
UV index (High)
41
% chance of some rain
<10
mm of rainfall expected
25
°C wind chill
0
kph wind from NE

St Louis weather for Monday 25th May 2026

Expect isolated thunderstorms in St Louis, Missouri with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and little or no wind of 2 kph from the east.