Weather in O'Fallon, IL
O'Fallon, Tuesday, 27 October, 15:56
Mostly clear. Feels like 70°. High 71°, low 50°.
Two-week outlook for O'Fallon, IL: week one averages a high of 71.8° and week two 59.1°, so week two runs 12.7° cooler than week one. Around 2.8 inches of precipitation are expected over the 14 days, across 5 wet days. The nearest weekend, October 31: 71°, dry.
Week one vs week two
| Week | High | Low | Precipitation | Vs normal |
|---|---|---|---|---|
| 1st (October 27 – November 2) | 71.8° | 55.4° | 0.1 in / 1 d | — |
| 2nd (November 3 – November 9) | 59.1° | 48.3° | 2.7 in / 4 d | — |
Weekend weather
0O'Fallon, Wednesday, 28 October
Clear. High 78°, low 50°.
0.01O'Fallon, Thursday, 29 October
Light rain. High 79°, low 53°.
0O'Fallon, Friday, 30 October
Overcast. High 76°, low 60°.
0O'Fallon, Saturday, 31 October
Overcast. High 71°, low 60°.
0.1O'Fallon, Sunday, 1 November
Light rain. High 63°, low 57°.
0.02O'Fallon, Monday, 2 November
Light rain. High 65°, low 58°.
1.65O'Fallon, Tuesday, 3 November
Heavy rain. High 71°, low 61°.
0.81O'Fallon, Wednesday, 4 November
Rain. High 60°, low 47°.
0.08O'Fallon, Thursday, 5 November
Light rain. High 58°, low 49°.
0.17O'Fallon, Friday, 6 November
Light rain. High 58°, low 54°.
0.01O'Fallon, Saturday, 7 November
Light rain. High 56°, low 50°.
0O'Fallon, Sunday, 8 November
Clear. High 56°, low 41°.
0O'Fallon, Monday, 9 November
Clear. High 54°, low 36°.
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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