When to paint a house exterior in Janesville, WI
When to paint in Janesville, WI
A normal season: plan the job, do not leave it late. The painting window is June to September, with 4 good months a year. The best month is August, at about 22 painting days. Book a painter by April.
If you want the house done in June to September, call for quotes in April 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.
- under 1Jan
- under 1Feb
- under 1Mar
- 2Apr
- 10May
- 17Jun
- 21Jul
- 22Aug
- 18Sep
- 5Oct
- 1Nov
- under 1Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | under 1 | under 1 | under 1 | 16° / 29°F |
| February | under 1 | under 1 | 2 | 19° / 35°F |
| March | under 1 | under 1 | 4 | 29° / 47°F |
| April | 2 | 1 | 12 | 39° / 60°F |
| May | 10 | 7 | 19 | 51° / 72°F |
| June | 17 | 9 | 18 | 61° / 81°F |
| July | 21 | 13 | 21 | 64° / 82°F |
| August | 22 | 18 | 22 | 62° / 80°F |
| September | 18 | 14 | 21 | 57° / 76°F |
| October | 5 | 4 | 17 | 44° / 63°F |
| November | 1 | 1 | 7 | 33° / 49°F |
| December | under 1 | under 1 | under 1 | 24° / 37°F |
Deck stain does best in August. Low-temperature paint adds about 48 days a year here.
Towns near Janesville compared
6 get fewer, down to 55 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.
| Place | From Janesville | Painting days a year | Window | Station |
|---|---|---|---|---|
| Beloit, WI | 11 mi south | 69 | July to September | Greater Rockford Airport |
| Whitewater, WI | 18 mi northeast | 55 | July to August | Watertown Municipal Airport |
| Roscoe, IL | 18 mi south | 69 | July to September | Greater Rockford Airport |
| Fort Atkinson, WI | 19 mi northeast | 55 | July to August | Watertown Municipal Airport |
| Stoughton, WI | 20 mi northwest | 69 | July to August | Dane County Regional-Truax Field |
| Machesney Park, IL | 22 mi south | 69 | July to September | Greater Rockford Airport |
How Janesville ranks in WI
Of 98 WI places with 10,000 people or more, Janesville (population 66,428, 10th largest) ranks 9th for painting days, 27 days above the state median of 69. The longest season in the state is Appleton, 111 days, 115 miles north. The shortest is Superior at 29. 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 Monroe Municipal Airport (29.8 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.