Marion weather live forecast

Today's maximum temperature in Marion is expected to be 33°C. Select a day from the live weather forecast for Marion, Illinois, USA for more weather parameters.

Sunday
30th Aug
33

19

11

8
Monday
31st Aug
33

23

11

8
Tuesday
1st Sep
35

24

10

8
Wednesday
2nd Sep
35

24

11

8
Thursday
3rd Sep
35

24

11

8

5-day weather forecast updated at 04:01 on Sunday 30th August 2026 GMT

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

Marion weather forecast by day

Below are the detailed weather forecasts for Marion for the next 5 days.

Marion weather for Sunday 30th August 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

33
°C maximum temperature
19
°C minimum temperature
scattered clouds
11
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
17
kph wind from S

Marion weather for Monday 31st August 2026

33
°C maximum temperature
23
°C minimum temperature
scattered clouds
11
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
15
kph wind from S

Marion weather for Tuesday 1st September 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

35
°C maximum temperature
24
°C minimum temperature
scattered clouds
10
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
11
kph wind from S

Marion weather for Wednesday 2nd September 2026

Expect clear skies in Marion, Illinois with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.