Rio Vista, CA Weather & Growing Conditions
Today
68°F
Sunny
Sunny. High near 68, with temperatures falling to around 65 in the afternoon. North northwest wind 6 to 14 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Sunny | 6 to 14 mph NNW | 1% |
| Tonight | 49°F | Mostly Cloudy | 5 to 8 mph W | 2% |
| Thursday | 71°F | Mostly Sunny | 5 to 9 mph NW | 0% |
| Thursday Night | 49°F | Mostly Clear | 5 mph WNW | 0% |
| Friday | 70°F | Sunny | 1 to 5 mph NNW | 0% |
| Friday Night | 49°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 71°F | Sunny | 0 to 6 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 0 to 5 mph WNW | 0% |
| Sunday | 72°F | Sunny | 1 to 6 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 0 to 3 mph WSW | 0% |
| Monday | 70°F | Mostly Sunny | 2 to 6 mph W | 0% |
| Monday Night | 51°F | Partly Cloudy | 5 mph WSW | 1% |
| Tuesday | 71°F | Sunny | 1 to 5 mph WNW | 5% |
| Tuesday Night | 51°F | Mostly Clear | 1 to 5 mph SW | 9% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rio Vista, CA
Last spring frost
Jan 12
First fall frost
Dec 19
Growing season
343 days
Hardiness zone
9b
Explore more for Rio Vista, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Antioch Pumping Plt #3, Ca (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.