Today
O Fallon, Illinois
Tomorrow
71°
HIGH
53°
LOW
Thursday
66°
39°
Friday
Saturday
68°
44°
91.01%
90.55%
85.34%
85.10%
82.82%
77.24%
73.48%
63.41%
62.58%
60.01%
55.92%
52.92%
83.73%
82.87%
79.77%
79.68%
77.84%
72.92%
71.60%
69.74%
65.00%
64.53%
63.64%
45.09%
On average, Foreca's low temperature forecasts for O Fallon were off by 2.64 degrees last year.
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