Weather O'Fallon weekend

Weather forecast for O'Fallon for this and next weekend.
Today
7/4/26
33 / 28 °C
Tomorrow
7/5/26
32 / 23 °C
Monday
7/6/26
30 / 22 °C
Sunday partly cloudy morning, turning to light rain showers by midday, then changing to heavy rain in the afternoon, becoming light rain showers in the evening.
Sunday, Jul 5
image/svg+xml
32 / 23°C
21.9 mm image/svg+xml 24 km/h
27 °C 32 °C 9 am
31 °C 36 °C 12 pm
32 °C 35 °C 3 pm
24 °C 29 °C 9 pm
sunrise 5:40 am
sunset 8:27 pm
HOURLY
Partly cloudy morning, turning to light rain showers by midday, then changing to heavy rain in the afternoon, becoming light rain showers in the evening. High of 32 °C. Total rainfall 22.0 mm. Cloudy overnight with a low of 23 °C.

Interactive map weather Illinois, USA


GPS: 38.5923; -89.9112
altitude: 168 m
local time:
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Weather forecast O'Fallon, Illinois, USA extended forecast

Time State   Temp.   Feels like Precip. Wind PressureHumidity Dew total
 
 Fog Low
 
 Middle
 
 High
 

Sunday 07/05/2026
12 AM
1 AM 
partly cloudy 27 °C
31 °C		 0.0 mm
 3.4 m/s12 km/h
west-southwest		 1013 hPa72 % 21  °C32 % 0% 0% 23% 10%
1 AM
2 AM 
overcast 26 °C
30 °C		 0.0 mm
 3.2 m/s12 km/h
west-southwest		 1013 hPa77 % 21  °C100 % 0% 0% 100% 47%
2 AM
3 AM 
clear 26 °C
30 °C		 0.0 mm
 3.1 m/s11 km/h
west-southwest		 1013 hPa77 % 21  °C3 % 0% 0% 0% 3%
3 AM
4 AM 
partly cloudy 26 °C
30 °C		 0.0 mm
 3.0 m/s11 km/h
west		 1013 hPa80 % 21  °C33 % 0% 0% 2% 32%
4 AM
5 AM 
clear 25 °C
29 °C		 0.0 mm
 2.9 m/s10 km/h
west-northwest		 1013 hPa81 % 22  °C12 % 0% 10% 3% 0%
5 AM
6 AM 
clear 25 °C
30 °C		 0.0 mm
 1.4 m/s5 km/h
north-northwest		 1012 hPa86 % 22  °C0 % 0% 0% 0% 0%
6 AM
7 AM 
clear 24 °C
29 °C		 0.0 mm
 0.9 m/s3 km/h
northeast		 1012 hPa90 % 22  °C8 % 0% 0% 8% 0%
7 AM
8 AM 
partly cloudy 25 °C
29 °C		 0.0 mm
 2.1 m/s8 km/h
northwest		 1013 hPa85 % 22  °C20 % 0% 0% 20% 0%
8 AM
9 AM 
overcast 26 °C
30 °C		 0.0 mm
 1.4 m/s5 km/h
north		 1013 hPa78 % 22  °C86 % 0% 3% 85% 0%
9 AM
10 AM 
cloudy 27 °C
31 °C		 0.0 mm
 0.9 m/s3 km/h
north		 1014 hPa73 % 22  °C46 % 0% 3% 18% 32%
10 AM
11 AM 
light rain showers 29 °C
33 °C		 0.1 mm
 0.9 m/s3 km/h
north		 1014 hPa65 % 22  °C69 % 0% 7% 4% 65%
11 AM
12 PM 
rain showers 30 °C
34 °C		 0.3 mm
 0.8 m/s3 km/h
northwest		 1013 hPa61 % 22  °C57 % 0% 10% 12% 45%
12 PM
1 PM 
rain showers 31 °C
35 °C		 0.3 mm
 1.2 m/s4 km/h
west-northwest		 1013 hPa57 % 21  °C42 % 0% 19% 6% 23%
1 PM
2 PM 
light rain 32 °C
36 °C		 0.1 mm
 1.5 m/s5 km/h
west-northwest		 1013 hPa52 % 21  °C100 % 0% 100% 11% 48%
2 PM
3 PM 
overcast 32 °C
35 °C		 0.0 mm
 1.5 m/s5 km/h
north-northwest		 1012 hPa49 % 19  °C96 % 0% 96% 44% 13%
3 PM
4 PM 
heavy rain 32 °C
35 °C		 12.3 mm
 3.3 m/s12 km/h
east		 1011 hPa49 % 19  °C100 % 0% 83% 100% 11%
4 PM
5 PM 
heavy rain 23 °C
27 °C		 6.6 mm
 6.7 m/s24 km/h
northeast		 1012 hPa97 % 22  °C95 % 16% 60% 69% 69%
5 PM
6 PM 
heavy rain 24 °C
29 °C		 1.4 mm
 3.3 m/s12 km/h
northwest		 1012 hPa94 % 22  °C99 % 0% 4% 78% 96%
6 PM
7 PM 
light rain showers 24 °C
29 °C		 0.1 mm
 2.1 m/s8 km/h
northwest		 1011 hPa94 % 23  °C98 % 0% 0% 3% 98%
7 PM
8 PM 
cloudy 25 °C
30 °C		 0.0 mm
 2.5 m/s9 km/h
north		 1012 hPa91 % 23  °C49 % 0% 26% 5% 28%
8 PM
9 PM 
cloudy 25 °C
30 °C		 0.0 mm
 1.7 m/s6 km/h
northeast		 1012 hPa92 % 23  °C52 % 0% 0% 2% 50%
9 PM
10 PM 
rain showers 24 °C
29 °C		 0.6 mm
 1.7 m/s6 km/h
north-northeast		 1012 hPa94 % 23  °C63 % 0% 10% 2% 57%
10 PM
11 PM 
light rain showers 24 °C
29 °C		 0.1 mm
 2.2 m/s8 km/h
north-northeast		 1013 hPa93 % 22  °C69 % 0% 20% 3% 60%
11 PM
12 AM 
overcast 23 °C
28 °C		 0.0 mm
 1.9 m/s7 km/h
northeast		 1013 hPa96 % 22  °C89 % 0% 13% 1% 86%

Monday 07/06/2026
12 AM
1 AM 
cloudy 23 °C
28 °C		 0.0 mm
 1.6 m/s6 km/h
north-northeast		 1013 hPa97 % 22  °C51 % 0% 0% 0% 51%
1 AM
2 AM 
clear 22 °C
26 °C		 0.0 mm
 1.4 m/s5 km/h
north-northeast		 1013 hPa97 % 21  °C7 % 0% 2% 0% 3%
2 AM
3 AM 
clear 22 °C
26 °C		 0.0 mm
 1.8 m/s6 km/h
north		 1013 hPa98 % 21  °C7 % 0% 1% 0% 5%
3 AM
4 AM 
partly cloudy 22 °C
26 °C		 0.0 mm
 2.1 m/s8 km/h
north		 1013 hPa98 % 21  °C13 % 0% 5% 0% 7%
4 AM
5 AM 
cloudy 22 °C
26 °C		 0.0 mm
 2.2 m/s8 km/h
north		 1013 hPa99 % 21  °C75 % 0% 73% 0% 9%
5 AM
6 AM 
overcast 22 °C
26 °C		 0.0 mm
 2.1 m/s8 km/h
north		 1013 hPa99 % 21  °C97 % 0% 97% 0% 1%
6 AM
7 AM 
overcast 22 °C
26 °C		 0.0 mm
 2.1 m/s8 km/h
north-northeast		 1014 hPa99 % 21  °C100 % 0% 100% 0% 4%
7 AM
8 AM 
overcast 22 °C
26 °C		 0.0 mm
 2.5 m/s9 km/h
north-northeast		 1014 hPa97 % 21  °C100 % 0% 100% 0% 3%
8 AM
9 AM 
overcast 23 °C
27 °C		 0.0 mm
 2.0 m/s7 km/h
north-northeast		 1015 hPa94 % 21  °C100 % 0% 100% 3% 0%
9 AM
10 AM 
overcast 24 °C
28 °C		 0.0 mm
 1.7 m/s6 km/h
north-northeast		 1015 hPa89 % 22  °C99 % 0% 99% 6% 1%
10 AM
11 AM 
overcast 26 °C
31 °C		 0.0 mm
 1.7 m/s6 km/h
north-northeast		 1015 hPa81 % 22  °C99 % 0% 99% 8% 2%
11 AM
12 PM 
light rain showers 26 °C
30 °C		 0.2 mm
 2.0 m/s7 km/h
north		 1015 hPa77 % 21  °C82 % 0% 80% 10% 2%
12 PM
1 PM 
partly cloudy 28 °C
33 °C		 0.0 mm
 2.4 m/s9 km/h
north		 1015 hPa73 % 22  °C25 % 0% 8% 16% 2%
1 PM
2 PM 
partly cloudy 29 °C
33 °C		 0.0 mm
 2.4 m/s9 km/h
north-northeast		 1015 hPa68 % 22  °C22 % 0% 3% 12% 8%
2 PM
3 PM 
partly cloudy 29 °C
33 °C		 0.0 mm
 2.3 m/s8 km/h
north-northeast		 1014 hPa65 % 22  °C28 % 0% 16% 7% 8%
3 PM
4 PM 
overcast 30 °C
34 °C		 0.0 mm
 2.4 m/s9 km/h
north-northeast		 1014 hPa63 % 21  °C100 % 0% 100% 4% 8%
4 PM
5 PM 
light rain 29 °C
33 °C		 0.2 mm
 3.0 m/s11 km/h
north-northeast		 1013 hPa65 % 21  °C93 % 0% 89% 5% 32%
5 PM
6 PM 
cloudy 28 °C
32 °C		 0.0 mm
 3.1 m/s11 km/h
north		 1013 hPa68 % 21  °C61 % 0% 0% 17% 53%
6 PM
7 PM 
light rain showers 29 °C
33 °C		 0.1 mm
 2.8 m/s10 km/h
north		 1013 hPa66 % 21  °C34 % 0% 3% 5% 28%
7 PM
8 PM 
partly cloudy 27 °C
31 °C		 0.0 mm
 3.0 m/s11 km/h
north-northeast		 1013 hPa72 % 22  °C32 % 0% 4% 6% 25%
8 PM
9 PM 
cloudy 26 °C
31 °C		 0.0 mm
 1.6 m/s6 km/h
east-northeast		 1014 hPa81 % 22  °C42 % 0% 5% 2% 37%
9 PM
10 PM 
partly cloudy 25 °C
29 °C		 0.0 mm
 1.8 m/s6 km/h
northeast		 1014 hPa84 % 22  °C18 % 0% 4% 3% 12%
10 PM
11 PM 
partly cloudy 25 °C
30 °C		 0.0 mm
 1.6 m/s6 km/h
northeast		 1014 hPa86 % 22  °C27 % 0% 9% 2% 18%
11 PM
12 AM 
cloudy 24 °C
28 °C		 0.0 mm
 2.0 m/s7 km/h
northeast		 1015 hPa87 % 21  °C46 % 0% 6% 1% 41%
 

O'Fallon, Illinois, USA - information

State: Illinois, USA
GPS coordinates: 38.5923; -89.9112
Time zone: America / Chicago time difference in hours with time in US is -7 hours

Population: 29 002
Altitude: 168 m
The administrative part:



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Data source

Weather forecast for O'Fallon is supplied by MET Norway Norwegian Meteorological Institute and the NRK.

Feels like

To calculate the perceived temperature, we use the Australian Apparent Temperature (AAT) model, which is designed for year-round calculations and takes air humidity into account in addition to temperature and wind speed.

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Astronomical information O'Fallon

data are always in the local time

Sun and light

 July 5, 2026 
Sunrise: Sunset: 
5:40 am 8:27 pm
Noon: Length of day: 
1:04 pm14:46
Start of civil twilight*: End of civil twilight*: 
5:08 am8:59 pm
Start of nautical twilight*: End of nautical twilight*: 
4:30 am9:38 pm
Start of astronomical twilight*:  End of astronomical twilight*: 
3:45 am10:23 pm
* What is Twilight?

Moon and moon phases

Moonrise: Moonset: 
07/04/2026 11:17 pm 07/05/2026 11:05 am
Next new moon: Next full moon: 
07/14/202607/29/2026

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