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.

Friday
31st Jul
28

21

6

7
Saturday
1st Aug
25

20

1

2
Sunday
2nd Aug
24

20

1

5
Monday
3rd Aug
27

19

4

9
Tuesday
4th Aug
29

19

5

8

5-day weather forecast updated at 04:01 on Friday 31st 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 31st July 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 64% chance of some rain and a gentle breeze of 17 kph from the south-east.

28
°C maximum temperature
21
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
7
UV index (High)
64
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
17
kph wind from SE

Marion weather for Saturday 1st August 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 25°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 45% chance of some rain and a gentle breeze of 18 kph from the west.

25
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
2
UV index (Low)
45
% chance of some rain
<10
mm of rainfall expected
25
°C wind chill
18
kph wind from W

Marion weather for Sunday 2nd August 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 24°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 53% chance of some rain and a gentle breeze of 16 kph from the north-west.

24
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
5
UV index (Moderate)
53
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
16
kph wind from NW

Marion weather for Monday 3rd August 2026

Expect broken clouds in Marion, Illinois with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.

27
°C maximum temperature
19
°C minimum temperature
broken clouds
4
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
13
kph wind from N

Marion weather for Tuesday 4th August 2026

Expect broken clouds 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 0 mm of rainfall expected and a light breeze of 9 kph from the north-east.