Rio Oso, CA Weather & Growing Conditions
This Afternoon
86°F
Sunny
Sunny, with a high near 86. Northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 86°F | Sunny | 6 mph NW | 0% |
| Tonight | 56°F | Clear | 3 mph SE | 0% |
| Saturday | 89°F | Sunny | 3 mph S | 0% |
| Saturday Night | 58°F | Partly Cloudy | 5 mph SSE | 0% |
| Sunday | 85°F | Mostly Sunny | 5 mph S | 0% |
| Sunday Night | 58°F | Mostly Cloudy | 5 mph SSE | 0% |
| Monday | 88°F | Sunny | 6 mph S | 0% |
| Monday Night | 57°F | Mostly Clear | 2 to 6 mph SSE | 0% |
| Tuesday | 88°F | Sunny | 3 mph SSW | 0% |
| Tuesday Night | 59°F | Clear | 1 to 5 mph SSE | 0% |
| Wednesday | 92°F | Sunny | 3 mph SSW | 0% |
| Wednesday Night | 60°F | Mostly Clear | 2 mph SSE | 0% |
| Thursday | 95°F | Sunny | 3 mph S | 0% |
| Thursday Night | 61°F | Mostly Clear | 3 mph SSE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Rio Oso, CA
Last spring frost
Feb 11
First fall frost
Nov 30
Growing season
289 days
Hardiness zone
9b
Explore more for Rio Oso, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Marysville Yuba Co Ap, Ca (11.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.