Weather in O'Fallon, IL
O'Fallon, Tuesday, 27 October, 05:35
Clear. Feels like 49°. High 74°, low 50°.
Two-week outlook for O'Fallon, IL: week one averages a high of 72.6° and week two 58.7°, so week two runs 13.9° cooler than week one. Around 2.4 inches of precipitation are expected over the 14 days, across 3 wet days. The nearest weekend, October 31: 74°, dry.
Week one vs week two
| Week | High | Low | Precipitation | Vs normal |
|---|---|---|---|---|
| 1st (October 27 – November 2) | 72.6° | 55.7° | 0.5 in / 1 d | — |
| 2nd (November 3 – November 9) | 58.7° | 47.3° | 1.9 in / 2 d | — |
Weekend weather
0
O'Fallon, Wednesday, 28 October
Clear. High 79°, low 50°.
0O'Fallon, Thursday, 29 October
Clear. High 79°, low 59°.
0.02O'Fallon, Friday, 30 October
Light rain. High 75°, low 59°.
0O'Fallon, Saturday, 31 October
Overcast. High 74°, low 60°.
0.44O'Fallon, Sunday, 1 November
Rain. High 66°, low 60°.
0O'Fallon, Monday, 2 November
Overcast. High 62°, low 51°.
0.02O'Fallon, Tuesday, 3 November
Light rain. High 62°, low 56°.
1.77O'Fallon, Wednesday, 4 November
Heavy rain. High 55°, low 53°.
0.15O'Fallon, Thursday, 5 November
Light rain. High 58°, low 52°.
0
O'Fallon, Friday, 6 November
Mostly clear. High 56°, low 42°.
0O'Fallon, Saturday, 7 November
Overcast. High 52°, low 38°.
0O'Fallon, Sunday, 8 November
Overcast. High 60°, low 42°.
0O'Fallon, Monday, 9 November
Overcast. High 68°, low 48°.
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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