Weather in O'Fallon, IL
O'Fallon, Wednesday, 28 October, 13:10
Clear. Feels like 75°. High 76°, low 50°.
Two-week outlook for O'Fallon, IL: week one averages a high of 72.5° and week two 57.8°, so week two runs 14.7° cooler than week one. Around 3.4 inches of precipitation are expected over the 14 days, across 6 wet days. The nearest weekend, October 31: 69°, dry.
Week one vs week two
| Week | High | Low | Precipitation | Vs normal |
|---|---|---|---|---|
| 1st (October 28 – November 3) | 72.5° | 56.9° | 0.3 in / 2 d | — |
| 2nd (November 4 – November 10) | 57.8° | 48.3° | 3.1 in / 4 d | — |
Weekend weather
0O'Fallon, Thursday, 29 October
Clear. High 79°, low 52°.
0O'Fallon, Friday, 30 October
Overcast. High 76°, low 56°.
0O'Fallon, Saturday, 31 October
Overcast. High 69°, low 61°.
0.02O'Fallon, Sunday, 1 November
Light rain. High 72°, low 59°.
0.07O'Fallon, Monday, 2 November
Light rain. High 71°, low 58°.
0.22O'Fallon, Tuesday, 3 November
Rain. High 65°, low 61°.
1.01O'Fallon, Wednesday, 4 November
Heavy rain. High 63°, low 61°.
1.13O'Fallon, Thursday, 5 November
Heavy rain. High 61°, low 57°.
0O'Fallon, Friday, 6 November
Overcast. High 59°, low 48°.
0O'Fallon, Saturday, 7 November
Overcast. High 55°, low 42°.
0O'Fallon, Sunday, 8 November
Overcast. High 54°, low 40°.
0.32O'Fallon, Monday, 9 November
Rain. High 56°, low 40°.
0.67O'Fallon, Tuesday, 10 November
Rain. High 57°, low 51°.
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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