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
11th Sep
26

20

5

5
Saturday
12th Sep
30

20

5

6
Sunday
13th Sep
32

20

8

6
Monday
14th Sep
32

20

11

7
Tuesday
15th Sep
33

20

8

7

5-day weather forecast updated at 04:01 on Thursday 10th September 2026 GMT

More about Marion

Marion by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Illinois

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

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 11th September 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 46% chance of some rain and a light breeze of 7 kph from the south-east.

26
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
5
UV index (Moderate)
46
% chance of some rain
<10
mm of rainfall expected
L
low heat & humidity
7
kph wind from SE

Marion weather for Saturday 12th September 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a light breeze of 9 kph from the south-west.

30
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
6
UV index (High)
33
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
9
kph wind from SW

Marion weather for Sunday 13th September 2026

Expect broken clouds in Marion, Illinois with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south.

32
°C maximum temperature
20
°C minimum temperature
broken clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
9
kph wind from S

Marion weather for Monday 14th September 2026

Expect clear skies in Marion, Illinois with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south.

32
°C maximum temperature
20
°C minimum temperature
clear skies
11
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from S

Marion weather for Tuesday 15th September 2026

Expect isolated thunderstorms in Marion, Illinois with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 54% chance of some rain and a gentle breeze of 14 kph from the south-west.