Best Time for Outdoor Projects in California

California weather and outdoor projects

California has a Mediterranean climate along most of the coast: a dry season from about May to October and a wet season in winter. That makes summer and early fall the easiest time for exterior work, because rain is rare. Coastal areas such as Los Angeles and San Francisco stay mild, but morning marine layer and fog can leave surfaces damp until late morning, which matters for paint and stain.

Inland valleys such as Sacramento and Fresno get very hot summers, and the desert southeast is hotter still, so work early in the day there. Winter storms can bring several days of heavy rain. Wildfire smoke and ash in late summer and fall can settle on wet paint and stain, so check air quality as well as the forecast.

Frost dates in California

Los Angeles (LAX) almost never freezes on average, so frost rarely limits outdoor projects there, though a cold snap can still bring a freezing night.

San Francisco (SFO) almost never freezes on average, so frost rarely limits outdoor projects there, though a cold snap can still bring a freezing night.

In Sacramento, the median last spring freeze (32°F) is around February 2 and the median first fall freeze is around December 2, a frost-free season of about 301 days.

Frost dates matter for concrete, which must not freeze in its first 48 hours, for paint and caulk that need nights above their minimum, and for lawn care, since crabgrass preventer goes down as the soil warms in spring. See how late in fall you can stain, paint or seal.

Best time to stain a deck in California

In Los Angeles (LAX), a typical month suits this job all year round.

In San Francisco (SFO), the most reliable months are April–November. December–March can also work on the right days. December–February is cool, with highs around 59°F, so choose the warmest afternoons. In March, nights average about 48°F, so finish early on mild days and check the overnight low.

In Sacramento, the most reliable months are May and October. June, August–September and November–April can also work on the right days. July is hot, with average highs near 93°F and about 21 days a month at 90°F or more, so work early in the day. December–February is cool, with highs around 58°F, so choose the warmest afternoons. In March–April and November, nights average about 45°F, so finish early on mild days and check the overnight low. June and August–September are hot, with highs near 89°F, so start early and keep out of full afternoon sun.

Check this week’s hour-by-hour verdict with the deck staining forecast.

Best time to paint outside in California

In Los Angeles (LAX), the most reliable months are September–May. June–August can also work on the right days. Afternoon humidity in June–August is around 66%, so allow extra drying time and stop well before evening dew.

In San Francisco (SFO), the most reliable months are March–November. December–February can also work on the right days. In December–January, nights average about 45°F, so finish early on mild days and check the overnight low. February averages about 8 wet days a month, so wait for a clear stretch.

In Sacramento, the most reliable months are April–May and October. June, August–September and November–March can also work on the right days. July is hot, with average highs near 93°F and about 21 days a month at 90°F or more, so work early in the day. December–January is cool, with highs around 56°F, so choose the warmest afternoons. In February–March and November, nights average about 43°F, so finish early on mild days and check the overnight low. June and August–September are hot, with highs near 89°F, so start early and keep out of full afternoon sun.

Check this week’s hour-by-hour verdict with the exterior painting forecast.

Best time to pour concrete in California

In Los Angeles (LAX), a typical month suits this job all year round.

In San Francisco (SFO), a typical month suits this job all year round.

In Sacramento, the most reliable months are March–October. November–February can also work on the right days. November–February brings about 4 freezing nights a month, so pick a mild spell and keep curing blankets on hand.

Check this week’s hour-by-hour verdict with the concrete pouring forecast.

Best time to seal a driveway in California

In Los Angeles (LAX), the most reliable months are April–November. December–March can also work on the right days. December–March is cool, with highs around 66°F, so choose the warmest afternoons.

In San Francisco (SFO), the most reliable months are June–October. February–May and November can also work on the right days. December–January is too cold, with average highs around 58°F. February–April and November are cool, with highs around 64°F, so choose the warmest afternoons. In May, nights average about 52°F, so finish early on mild days and check the overnight low.

In Sacramento, the most reliable months are May–September. March–April and October–November can also work on the right days. December–January is too cold, with average highs around 56°F. In February, nights average about 42°F, too cold for the coating to dry and cure overnight. March and November are cool, with highs around 66°F, so choose the warmest afternoons. In April and October, nights average about 49°F, so finish early on mild days and check the overnight low.

Check this week’s hour-by-hour verdict with the driveway sealing forecast.

Best time to fertilize or treat a lawn in California

In Los Angeles (LAX), a typical month suits this job all year round.

In San Francisco (SFO), the most reliable months are February–November. December–January can also work on the right days. December–January is cool, with highs around 58°F, so choose the warmest afternoons.

In Sacramento, the most reliable months are February–May and October–November. June, August–September and December–January can also work on the right days. July is hot, with average highs near 93°F and about 21 days a month at 90°F or more, so work early in the day. December–January is cool, with highs around 56°F, so choose the warmest afternoons. June and August–September are hot, with highs near 89°F, so start early and keep out of full afternoon sun.

Check this week’s hour-by-hour verdict with the lawn fertilizer forecast.

How the weather differs across California

Of the places above, Los Angeles (LAX) has the most good months for staining, painting and concrete combined (33 job-months), and Sacramento has the fewest (13). If you live between them, expect something in between, and higher ground to be cooler with a shorter season.

Monthly weather in Los Angeles (LAX)

*Days with at least 0.1 inch of rain or melted snow. Freezing nights: average nights a month at or below 32°F. Humidity is calculated from NOAA hourly normal temperature and dew point at 3 PM.

Monthly weather in San Francisco (SFO)

Monthly weather in Sacramento

Use the averages, then check the forecast

These ratings describe a typical month, not a particular week. A warm spell in a “poor” month can give you a good day, and a wet week can spoil a “good” one. Use this page to plan the season, then check the 7-day forecast for your ZIP code before you buy materials or book help. Each project forecast checks the hours after you finish too: overnight lows, dew and rain that would ruin fresh stain, paint, sealer or concrete.

About this data

Monthly temperatures, rain days, snowfall and freeze dates are NOAA National Centers for Environmental Information (NCEI) U.S. Climate Normals for 1991–2020 at LOS ANGELES INTL AP, SAN FRANCISCO INTL AP, SACRAMENTO EXECUTIVE AP. Ratings apply the same temperature limits as our forecasts (for example, 50°F or warmer for deck stain and driveway sealer, and no freezing nights for new concrete) to the average month. Your product label always takes priority.