When to paint a house exterior in Rialto, CA
When to paint in Rialto, CA
A normal season: plan the job, do not leave it late. The painting window is April to June, with 4 good months a year. The best month is May, at about 25 painting days. Book a painter by February.
If you want the house done in April to June, call for quotes in February or earlier; a job pushed past June is likely to wait until next year. For a deck, the months with enough staining days to spare are Mar, Apr, May, Jun, Sep, Oct, Nov.
- 4Jan
- 5Feb
- 12Mar
- 20Apr
- 25May
- 12Jun
- 3Jul
- 3Aug
- 11Sep
- 18Oct
- 8Nov
- 2Dec
Month by month
| Month | Painting days | Staining days | With low-temp paint | Avg low / high |
|---|---|---|---|---|
| January | 4 | 3 | 29 | 43° / 69°F |
| February | 5 | 2 | 26 | 44° / 73°F |
| March | 12 | 8 | 30 | 48° / 75°F |
| April | 20 | 19 | 26 | 53° / 80°F |
| May | 25 | 24 | 26 | 57° / 82°F |
| June | 12 | 12 | 12 | 63° / 92°F |
| July | 3 | 2 | 3 | 68° / 98°F |
| August | 3 | 3 | 3 | 68° / 98°F |
| September | 11 | 11 | 11 | 65° / 93°F |
| October | 18 | 14 | 21 | 58° / 86°F |
| November | 8 | 6 | 27 | 48° / 78°F |
| December | 2 | 2 | 29 | 43° / 69°F |
Deck stain does best in May. Low-temperature paint adds about 118 days a year here.
Towns near Rialto compared
3 get fewer, down to 103 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. San Bernardino, Colton, Grand Terrace are read from the same station as Rialto, so their numbers match; the real difference is the distance from that station.
| Place | From Rialto | Painting days a year | Window | Station |
|---|---|---|---|---|
| Fontana, CA | 4 mi west | 114 | April to June | Ontario International Airport |
| San Bernardino, CA | 6 mi east | 124 | April to June | same station |
| Colton, CA | 6 mi southeast | 124 | April to June | same station |
| Grand Terrace, CA | 7 mi southeast | 124 | April to June | same station |
| Jurupa Valley, CA | 9 mi southwest | 103 | April to June | Riverside Municipal Airport |
| Loma Linda, CA | 10 mi southeast | 117 | April to June | San Bernardino International |
How Rialto ranks in CA
Of 376 CA places with 10,000 people or more, Rialto (population 104,918, 66th largest) ranks 197th for painting days, 4 days below the state median of 128. The longest season in the state is Santa Clarita, 269 days, 67 miles west. The shortest is Susanville at 4. Switching to low-temperature paint here is worth 118 extra days, more than most of the summer months on their own.
Where these numbers come from
Daily records from Norton Army Airfield (8.1 miles away), 2015 to 2024, NOAA Global Summary of the Day. A month is good at 12+ painting days and possible at 6+.