Weather O'Fallon today

PLACES IN THE AREA

81 °F	90 °F	9 am
88 °F	97 °F	12 pm
90 °F	95 °F	3 pm
75 °F	84 °F	9 pm

sunrise 5:40 am
sunset 8:27 pm

HOURLY

Weather forecast O'Fallon July 5, 2026

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 90 °F. Total rainfall 0.87 in. Cloudy overnight with a low of 73 °F.

Interactive map weather Illinois, USA

GPS: 38.5923; -89.9112

altitude: 551 ft
local time:

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Weather forecast O'Fallon, Illinois, USA extended forecast

Time			Precip.	Wind	Pressure	Humidity	Dew	total	Fog	Low	Middle	High
Today, Sunday 07/05/2026
12 AM 6 AM	partly cloudy	81 °F 88 °F	0.0 in	11 fps 8 mph west-southwest	29.9 in	72 %	70 °F	32 %	0%	0%	23%	10%
1 AM 7 AM	overcast	79 °F 86 °F	0.0 in	10 fps 7 mph west-southwest	29.9 in	77 %	70 °F	100 %	0%	0%	100%	47%
2 AM 8 AM	clear	79 °F 86 °F	0.0 in	10 fps 7 mph west-southwest	29.9 in	77 %	70 °F	3 %	0%	0%	0%	3%
3 AM 9 AM	partly cloudy	79 °F 86 °F	0.0 in	10 fps 7 mph west	29.9 in	80 %	70 °F	33 %	0%	0%	2%	32%
4 AM 10 AM	clear	77 °F 84 °F	0.0 in	10 fps 6 mph west-northwest	29.9 in	81 %	72 °F	12 %	0%	10%	3%	0%
5 AM 11 AM	clear	77 °F 86 °F	0.0 in	5 fps 3 mph north-northwest	29.9 in	86 %	72 °F	0 %	0%	0%	0%	0%
6 AM 12 PM	clear	75 °F 84 °F	0.0 in	3 fps 2 mph northeast	29.9 in	90 %	72 °F	8 %	0%	0%	8%	0%
7 AM 1 PM	partly cloudy	77 °F 84 °F	0.0 in	7 fps 5 mph northwest	29.9 in	85 %	72 °F	20 %	0%	0%	20%	0%
8 AM 2 PM	overcast	79 °F 86 °F	0.0 in	5 fps 3 mph north	29.9 in	78 %	72 °F	86 %	0%	3%	85%	0%
9 AM 3 PM	cloudy	81 °F 88 °F	0.0 in	3 fps 2 mph north	29.9 in	73 %	72 °F	46 %	0%	3%	18%	32%
10 AM 4 PM	light rain showers	84 °F 91 °F	0.00 in	3 fps 2 mph north	29.9 in	65 %	72 °F	69 %	0%	7%	4%	65%
11 AM 5 PM	rain showers	86 °F 93 °F	0.01 in	3 fps 2 mph northwest	29.9 in	61 %	72 °F	57 %	0%	10%	12%	45%
12 PM 6 PM	rain showers	88 °F 95 °F	0.01 in	4 fps 3 mph west-northwest	29.9 in	57 %	70 °F	42 %	0%	19%	6%	23%
1 PM 7 PM	light rain	90 °F 97 °F	0.00 in	5 fps 3 mph west-northwest	29.9 in	52 %	70 °F	100 %	0%	100%	11%	48%
2 PM 8 PM	overcast	90 °F 95 °F	0.0 in	5 fps 3 mph north-northwest	29.9 in	49 %	66 °F	96 %	0%	96%	44%	13%
3 PM 9 PM	heavy rain	90 °F 95 °F	0.48 in	11 fps 7 mph east	29.9 in	49 %	66 °F	100 %	0%	83%	100%	11%
4 PM 10 PM	heavy rain	73 °F 81 °F	0.26 in	22 fps 15 mph northeast	29.9 in	97 %	72 °F	95 %	16%	60%	69%	69%
5 PM 11 PM	heavy rain	75 °F 84 °F	0.06 in	11 fps 7 mph northwest	29.9 in	94 %	72 °F	99 %	0%	4%	78%	96%
6 PM 12 AM	light rain showers	75 °F 84 °F	0.00 in	7 fps 5 mph northwest	29.9 in	94 %	73 °F	98 %	0%	0%	3%	98%
7 PM 1 AM	cloudy	77 °F 86 °F	0.0 in	8 fps 6 mph north	29.9 in	91 %	73 °F	49 %	0%	26%	5%	28%
8 PM 2 AM	cloudy	77 °F 86 °F	0.0 in	6 fps 4 mph northeast	29.9 in	92 %	73 °F	52 %	0%	0%	2%	50%
9 PM 3 AM	rain showers	75 °F 84 °F	0.02 in	6 fps 4 mph north-northeast	29.9 in	94 %	73 °F	63 %	0%	10%	2%	57%
10 PM 4 AM	light rain showers	75 °F 84 °F	0.00 in	7 fps 5 mph north-northeast	29.9 in	93 %	72 °F	69 %	0%	20%	3%	60%
11 PM 5 AM	overcast	73 °F 82 °F	0.0 in	6 fps 4 mph northeast	29.9 in	96 %	72 °F	89 %	0%	13%	1%	86%
Tomorrow, Monday 07/06/2026
12 AM 6 AM	cloudy	73 °F 82 °F	0.0 in	5 fps 4 mph north-northeast	29.9 in	97 %	72 °F	51 %	0%	0%	0%	51%
1 AM 7 AM	clear	72 °F 79 °F	0.0 in	5 fps 3 mph north-northeast	29.9 in	97 %	70 °F	7 %	0%	2%	0%	3%
2 AM 8 AM	clear	72 °F 79 °F	0.0 in	6 fps 4 mph north	29.9 in	98 %	70 °F	7 %	0%	1%	0%	5%
3 AM 9 AM	partly cloudy	72 °F 79 °F	0.0 in	7 fps 5 mph north	29.9 in	98 %	70 °F	13 %	0%	5%	0%	7%
4 AM 10 AM	cloudy	72 °F 79 °F	0.0 in	7 fps 5 mph north	29.9 in	99 %	70 °F	75 %	0%	73%	0%	9%
5 AM 11 AM	overcast	72 °F 79 °F	0.0 in	7 fps 5 mph north	29.9 in	99 %	70 °F	97 %	0%	97%	0%	1%
6 AM 12 PM	overcast	72 °F 79 °F	0.0 in	7 fps 5 mph north-northeast	29.9 in	99 %	70 °F	100 %	0%	100%	0%	4%
7 AM 1 PM	overcast	72 °F 79 °F	0.0 in	8 fps 6 mph north-northeast	29.9 in	97 %	70 °F	100 %	0%	100%	0%	3%
8 AM 2 PM	overcast	73 °F 81 °F	0.0 in	7 fps 4 mph north-northeast	30.0 in	94 %	70 °F	100 %	0%	100%	3%	0%
9 AM 3 PM	overcast	75 °F 82 °F	0.0 in	6 fps 4 mph north-northeast	30.0 in	89 %	72 °F	99 %	0%	99%	6%	1%
10 AM 4 PM	overcast	79 °F 88 °F	0.0 in	6 fps 4 mph north-northeast	30.0 in	81 %	72 °F	99 %	0%	99%	8%	2%
11 AM 5 PM	light rain showers	79 °F 86 °F	0.01 in	7 fps 4 mph north	30.0 in	77 %	70 °F	82 %	0%	80%	10%	2%
12 PM 6 PM	partly cloudy	82 °F 91 °F	0.0 in	8 fps 5 mph north	30.0 in	73 %	72 °F	25 %	0%	8%	16%	2%
1 PM 7 PM	partly cloudy	84 °F 91 °F	0.0 in	8 fps 5 mph north-northeast	30.0 in	68 %	72 °F	22 %	0%	3%	12%	8%
2 PM 8 PM	partly cloudy	84 °F 91 °F	0.0 in	8 fps 5 mph north-northeast	29.9 in	65 %	72 °F	28 %	0%	16%	7%	8%
3 PM 9 PM	overcast	86 °F 93 °F	0.0 in	8 fps 5 mph north-northeast	29.9 in	63 %	70 °F	100 %	0%	100%	4%	8%
4 PM 10 PM	light rain	84 °F 91 °F	0.01 in	10 fps 7 mph north-northeast	29.9 in	65 %	70 °F	93 %	0%	89%	5%	32%
5 PM 11 PM	cloudy	82 °F 90 °F	0.0 in	10 fps 7 mph north	29.9 in	68 %	70 °F	61 %	0%	0%	17%	53%
6 PM 12 AM	light rain showers	84 °F 91 °F	0.00 in	9 fps 6 mph north	29.9 in	66 %	70 °F	34 %	0%	3%	5%	28%
7 PM 1 AM	partly cloudy	81 °F 88 °F	0.0 in	10 fps 7 mph north-northeast	29.9 in	72 %	72 °F	32 %	0%	4%	6%	25%
8 PM 2 AM	cloudy	79 °F 88 °F	0.0 in	5 fps 4 mph east-northeast	29.9 in	81 %	72 °F	42 %	0%	5%	2%	37%
9 PM 3 AM	partly cloudy	77 °F 84 °F	0.0 in	6 fps 4 mph northeast	29.9 in	84 %	72 °F	18 %	0%	4%	3%	12%
10 PM 4 AM	partly cloudy	77 °F 86 °F	0.0 in	5 fps 4 mph northeast	29.9 in	86 %	72 °F	27 %	0%	9%	2%	18%
11 PM 5 AM	cloudy	75 °F 82 °F	0.0 in	7 fps 4 mph northeast	30.0 in	87 %	70 °F	46 %	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: 551 ft
The administrative part:

Illinois, Springfield
Saint Clair County, Belleville

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Weather O'Fallon, Illinois, USA. Weather forecast O'Fallon.

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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 pm	14:46
Start of civil twilight*:	End of civil twilight*:
5:08 am	8:59 pm
Start of nautical twilight*:	End of nautical twilight*:
4:30 am	9:38 pm
Start of astronomical twilight*:	End of astronomical twilight*:
3:45 am	10:23 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:
07/14/2026	07/29/2026