When to paint a house exterior in Waterloo, IL
When to paint in Waterloo, 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 Apr, May, Jun, Jul, Aug, Sep, Oct.
- under 1Jan
- 1Feb
- 2Mar
- 6Apr
- 10May
- 10Jun
- 9Jul
- 14Aug
- 14Sep
- 8Oct
- 2Nov
- under 1Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | under 1 | under 1 | 2 | 26° / 43°F |
| February | 1 | 1 | 5 | 28° / 49°F |
| March | 2 | 2 | 9 | 38° / 60°F |
| April | 6 | 4 | 15 | 46° / 70°F |
| May | 10 | 7 | 14 | 57° / 79°F |
| June | 10 | 8 | 10 | 66° / 89°F |
| July | 9 | 6 | 9 | 70° / 90°F |
| August | 14 | 13 | 14 | 67° / 88°F |
| September | 14 | 12 | 17 | 60° / 85°F |
| October | 8 | 6 | 19 | 48° / 72°F |
| November | 2 | 2 | 10 | 37° / 58°F |
| December | under 1 | under 1 | 4 | 31° / 49°F |
Deck stain does best in August. Low-temperature paint adds about 52 days a year here.
Towns near Waterloo compared
2 get fewer, down to 70 a year. 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. Columbia, Arnold, Cahokia Heights, Festus are read from the same station as Waterloo, so their numbers match; the real difference is the distance from that station.
| Place | From Waterloo | Painting days a year | Window | Station |
|---|---|---|---|---|
| Columbia, IL | 9 mi northwest | 75 | August to September | same station |
| Arnold, MO | 13 mi northwest | 75 | August to September | same station |
| Belleville, IL | 15 mi northeast | 70 | August to September | Scott Air Force Base/Midameri |
| Cahokia Heights, IL | 16 mi north | 75 | August to September | same station |
| Festus, MO | 16 mi southwest | 75 | August to September | same station |
| Swansea, IL | 17 mi northeast | 70 | August to September | Scott Air Force Base/Midameri |
How Waterloo ranks in IL
Of 225 IL places with 10,000 people or more, Waterloo (population 11,165, 207th largest) ranks 171st for painting days, 2 days below the state median of 77. The longest season in the state is Chicago, 131 days, 274 miles northeast. The shortest is Woodstock at 65. Switching to low-temperature paint here is worth 52 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from St Louis Downtown Airport (15.9 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.