Marion weather live forecast

Today's maximum temperature in Marion is expected to be 26°C. Select a day from the live weather forecast for Marion, Illinois, USA for more weather parameters.

Friday
24th Jul
26

17

4

6
Saturday
25th Jul
29

20

5

8
Sunday
26th Jul
33

22

7

8
Monday
27th Jul
36

24

7

8
Tuesday
28th Jul
35

23

14

9

5-day weather forecast updated at 04:01 on Saturday 25th July 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 Friday 24th July 2026

Expect mostly cloudy with light rain in Marion, Illinois with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 21% chance of some rain and little or no wind of 4 kph from the north-east.

26
°C maximum temperature
17
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
6
UV index (High)
21
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
4
kph wind from NE

Marion weather for Saturday 25th July 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 49% chance of some rain and a light breeze of 10 kph from the south.

29
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
8
UV index (Very High)
49
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from S

Marion weather for Sunday 26th July 2026

Expect broken clouds in Marion, Illinois with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the west.

33
°C maximum temperature
22
°C minimum temperature
broken clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
7
kph wind from W

Marion weather for Monday 27th July 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 36°C, very high levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.

36
°C maximum temperature
24
°C minimum temperature
scattered clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
16
kph wind from SW

Marion weather for Tuesday 28th July 2026

Expect scattered clouds in Marion, Illinois with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 9 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.