When to paint a house exterior in Diamond Bar, CA
When to paint in Diamond Bar, 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 Diamond Bar compared
1 of the 6 nearest places get more painting days, the most in West Covina (246 a year, 6 miles northwest); 2 get fewer, down to 76 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. Walnut, Pomona, Covina are read from the same station as Diamond Bar, so their numbers match; the real difference is the distance from that station.
| Place | From Diamond Bar | Painting days a year | Window | Station |
|---|---|---|---|---|
| Walnut, CA | 3 mi northwest | 205 | March to November | same station |
| Pomona, CA | 5 mi northeast | 205 | March to November | same station |
| Brea, CA | 6 mi southwest | 188 | April to October | Fullerton Municipal Airport |
| West Covina, CA | 6 mi northwest | 246 | February to December | El Monte Airport |
| Chino Hills, CA | 7 mi southeast | 76 | May to June | Chino Airport |
| Covina, CA | 7 mi northwest | 205 | March to November | same station |
How Diamond Bar ranks in CA
Of 376 CA places with 10,000 people or more, Diamond Bar (population 52,292, 173rd largest) ranks 99th for painting days, 78 days above the state median of 128. The longest season in the state is Santa Clarita, 269 days, 48 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 (7.1 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.