When to paint a house exterior in O'Fallon, MO
When to paint in O'Fallon, MO
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 Apr, May, Jun, Jul, Aug, Sep, Oct.
- under 1Jan
- 1Feb
- 1Mar
- 6Apr
- 9May
- 9Jun
- 8Jul
- 14Aug
- 14Sep
- 7Oct
- 2Nov
- under 1Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | under 1 | under 1 | 2 | 24° / 43°F |
| February | 1 | 1 | 4 | 26° / 49°F |
| March | 1 | 1 | 7 | 37° / 60°F |
| April | 6 | 5 | 14 | 45° / 70°F |
| May | 9 | 7 | 14 | 57° / 79°F |
| June | 9 | 7 | 9 | 65° / 88°F |
| July | 8 | 5 | 8 | 69° / 90°F |
| August | 14 | 12 | 14 | 66° / 87°F |
| September | 14 | 12 | 18 | 60° / 84°F |
| October | 7 | 5 | 18 | 47° / 71°F |
| November | 2 | 2 | 8 | 36° / 58°F |
| December | under 1 | under 1 | 3 | 29° / 50°F |
Deck stain does best in August. Low-temperature paint adds about 48 days a year here.
Towns near O'Fallon compared
Every one of the 6 closest places lands within three days of O'Fallon's 71 a year, so the season here is the regional season. Dardenne Prairie, Lake St. Louis, St. Peters, Wentzville, Chesterfield 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 |
|---|---|---|---|---|
| Dardenne Prairie, MO | 3 mi south | 71 | August to September | same station |
| Lake St. Louis, MO | 3 mi west | 71 | August to September | same station |
| St. Peters, MO | 6 mi east | 71 | August to September | same station |
| Wentzville, MO | 8 mi west | 71 | August to September | same station |
| St. Charles, MO | 11 mi east | 70 | September | Lambert-St Louis Internationa |
| Chesterfield, MO | 11 mi southeast | 71 | August to September | same station |
How O'Fallon ranks in MO
Of 80 MO places with 10,000 people or more, O'Fallon (population 95,355, 7th largest) ranks 47th for painting days, 1 day below the state median of 72. The longest season in the state is Branson, 93 days, 205 miles southwest. The shortest is Moberly at 61. Switching to low-temperature paint here is worth 48 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from Spirit Of St Louis Airport (9.1 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.