When to paint a house exterior in O'Fallon, IL
When to paint in O'Fallon, IL
A short season: book early and expect weather delays. The painting window is August to September, with 2 good months a year. The best month is September, at about 14 painting days. Book a painter by June.
If you want the house done in August to September, call for quotes in June or earlier; a job pushed past September is likely to wait until next year. For a deck, the months with enough staining days to spare are May, Jun, Jul, Aug, Sep, Oct.
- under 1Jan
- under 1Feb
- 1Mar
- 4Apr
- 11May
- 10Jun
- 9Jul
- 13Aug
- 14Sep
- 7Oct
- 1Nov
- under 1Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | under 1 | under 1 | 2 | 25° / 42°F |
| February | under 1 | under 1 | 3 | 27° / 48°F |
| March | 1 | 1 | 7 | 37° / 59°F |
| April | 4 | 3 | 13 | 46° / 69°F |
| May | 11 | 8 | 15 | 57° / 78°F |
| June | 10 | 9 | 10 | 66° / 88°F |
| July | 9 | 6 | 9 | 69° / 89°F |
| August | 13 | 9 | 13 | 67° / 86°F |
| September | 14 | 13 | 17 | 60° / 84°F |
| October | 7 | 6 | 19 | 48° / 72°F |
| November | 1 | 1 | 8 | 36° / 57°F |
| December | under 1 | under 1 | 2 | 30° / 49°F |
Deck stain does best in September. Low-temperature paint adds about 49 days a year here.
Towns near O'Fallon compared
2 of the 6 nearest places get more painting days, the most in Fairview Heights (75 a year, 5 miles west). A gap like that between towns is usually elevation, a coast or a lake, which is why a painter from a few towns over can be on a different schedule. Shiloh, Swansea, Belleville, Troy are read from the same station as O'Fallon, so their numbers match; the real difference is the distance from that station.
| Place | From O'Fallon | Painting days a year | Window | Station |
|---|---|---|---|---|
| Shiloh, IL | 3 mi south | 70 | August to September | same station |
| Fairview Heights, IL | 5 mi west | 75 | August to September | St Louis Downtown Airport |
| Swansea, IL | 5 mi southwest | 70 | August to September | same station |
| Belleville, IL | 7 mi southwest | 70 | August to September | same station |
| Collinsville, IL | 7 mi northwest | 75 | August to September | St Louis Downtown Airport |
| Troy, IL | 9 mi north | 70 | August to September | same station |
How O'Fallon ranks in IL
Of 225 IL places with 10,000 people or more, O'Fallon (population 32,169, 59th largest) ranks 202nd for painting days, 7 days below the state median of 77. The longest season in the state is Chicago, 131 days, 253 miles northeast. The shortest is Woodstock at 65. Switching to low-temperature paint here is worth 49 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from Scott Air Force Base/Midameri (4.9 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.