Weather in O'Fallon, IL
O'Fallon, Sunday, 1 November, 03:08
Overcast. Feels like 60°. High 68°, low 60°.
Two-week outlook for O'Fallon, IL: week one averages a high of 65.1° and week two 61.9°, so week two runs 3.2° cooler than week one. Around 1.6 inches of precipitation are expected over the 14 days, across 4 wet days. The nearest weekend, November 1: 68°, with precipitation.
Week one vs week two
| Week | High | Low | Precipitation | Vs normal |
|---|---|---|---|---|
| 1st (November 1 – November 7) | 65.1° | 56.1° | 1.2 in / 2 d | — |
| 2nd (November 8 – November 14) | 61.9° | 46.5° | 0.4 in / 2 d | — |
Weekend weather
0O'Fallon, Monday, 2 November
Overcast. High 72°, low 61°.
1.13O'Fallon, Tuesday, 3 November
Heavy rain. High 73°, low 63°.
0O'Fallon, Wednesday, 4 November
Overcast. High 62°, low 55°.
0O'Fallon, Thursday, 5 November
Light rain. High 59°, low 51°.
0.01O'Fallon, Friday, 6 November
Light rain. High 58°, low 53°.
0O'Fallon, Saturday, 7 November
Overcast. High 63°, low 50°.
0O'Fallon, Sunday, 8 November
Partly cloudy. High 61°, low 49°.
0O'Fallon, Monday, 9 November
Clear. High 66°, low 46°.
0O'Fallon, Tuesday, 10 November
Overcast. High 70°, low 51°.
0.21O'Fallon, Wednesday, 11 November
Rain. High 67°, low 52°.
0.16O'Fallon, Thursday, 12 November
Light rain. High 58°, low 47°.
0O'Fallon, Friday, 13 November
Light rain. High 54°, low 43°.
0O'Fallon, Saturday, 14 November
Clear. High 56°, low 38°.
About this forecast
Can I plan a trip on a 2-week forecast?
Week one is solid for planning — accuracy is high. Week two shows the trend: go by the averages and the comparison with normal, and check the details closer to the date.
What does the "Vs normal" column mean?
It is the gap between the forecast and the climate normal for those same dates in O'Fallon, IL, computed over 60 years. A positive value means the week runs warmer than usual.
Why are weekends shown separately?
Saturday and Sunday plans are what people check most, so we give them their own cards with temperature and precipitation.
Sun and moon today
Weather history
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