Marion weather live forecast

Today's maximum temperature in Marion is expected to be 28°C. Select a day from the live weather forecast for Marion, Illinois, USA for more weather parameters.

Saturday
27th Jun
28

22

3

6
Sunday
28th Jun
33

22

10

10
Monday
29th Jun
35

23

13

10
Tuesday
30th Jun
36

24

13

10
Wednesday
1st Jul
35

24

12

10

5-day weather forecast updated at 04:01 on Saturday 27th June 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 Saturday 27th June 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 79% chance of some rain and a gentle breeze of 13 kph from the south-west.

28
°C maximum temperature
22
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
6
UV index (High)
79
% chance of some rain
<30
mm of rainfall expected
L
low heat & humidity
13
kph wind from SW

Marion weather for Sunday 28th June 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 10 (Very High) and 10 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
22
°C minimum temperature
scattered clouds
10
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
17
kph wind from S

Marion weather for Monday 29th June 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 10 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

35
°C maximum temperature
23
°C minimum temperature
scattered clouds
13
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
17
kph wind from S

Marion weather for Tuesday 30th June 2026

Expect clear skies in Marion, Illinois with a maximum temperature of 36°C, very high levels of heat & humidity, maximum UV of 10 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.

36
°C maximum temperature
24
°C minimum temperature
clear skies
13
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
12
kph wind from S

Marion weather for Wednesday 1st July 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 10 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south.