When to paint a house exterior in Walnut, CA
When to paint in Walnut, CA
A long painting season, with room to reschedule. The painting window is March to November, with 9 good months a year. The best month is May, at about 29 painting days. Book a painter by January.
If you want the house done in March to November, call for quotes in January or earlier; a job pushed past November is likely to wait until next year. For a deck, the months with enough staining days to spare are Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.
- 6Jan
- 9Feb
- 14Mar
- 23Apr
- 29May
- 23Jun
- 18Jul
- 16Aug
- 20Sep
- 25Oct
- 16Nov
- 7Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | 6 | 6 | 30 | 45° / 66°F |
| February | 9 | 7 | 27 | 46° / 68°F |
| March | 14 | 14 | 30 | 49° / 70°F |
| April | 23 | 23 | 29 | 53° / 75°F |
| May | 29 | 28 | 30 | 56° / 74°F |
| June | 23 | 23 | 23 | 62° / 84°F |
| July | 18 | 18 | 18 | 66° / 90°F |
| August | 16 | 14 | 16 | 67° / 91°F |
| September | 20 | 19 | 20 | 64° / 87°F |
| October | 25 | 24 | 26 | 59° / 82°F |
| November | 16 | 16 | 30 | 51° / 74°F |
| December | 7 | 7 | 29 | 45° / 66°F |
Deck stain does best in May. Low-temperature paint adds about 102 days a year here.
Towns near Walnut compared
2 of the 6 nearest places get more painting days, the most in West Covina (246 a year, 3 miles northwest). 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. Diamond Bar, Covina, San Dimas, Pomona are read from the same station as Walnut, so their numbers match; the real difference is the distance from that station.
| Place | From Walnut | Painting days a year | Window | Station |
|---|---|---|---|---|
| Diamond Bar, CA | 3 mi southeast | 205 | March to November | same station |
| West Covina, CA | 3 mi northwest | 246 | February to December | El Monte Airport |
| Covina, CA | 4 mi north | 205 | March to November | same station |
| San Dimas, CA | 6 mi northeast | 205 | March to November | same station |
| Pomona, CA | 6 mi east | 205 | March to November | same station |
| La Puente, CA | 6 mi west | 246 | February to December | El Monte Airport |
How Walnut ranks in CA
Of 376 CA places with 10,000 people or more, Walnut (population 27,250, 255th largest) ranks 105th for painting days, 78 days above the state median of 128. The longest season in the state is Santa Clarita, 269 days, 45 miles northwest. The shortest is Susanville at 4. Switching to low-temperature paint here is worth 102 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from Brackett Field Airport (6 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.