Rio Oso, CA Weather & Growing Conditions
Overnight
66°F
Clear
Clear. Low around 66, with temperatures rising to around 68 overnight. South southeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Clear | 5 mph SSE | 0% |
| Tuesday | 101°F | Sunny | 3 to 7 mph S | 0% |
| Tuesday Night | 63°F | Clear | 7 mph SSE | 0% |
| Wednesday | 99°F | Sunny | 6 mph S | 0% |
| Wednesday Night | 62°F | Clear | 7 mph S | 0% |
| Thursday | 99°F | Sunny | 5 mph S | 0% |
| Thursday Night | 63°F | Clear | 3 to 7 mph S | 0% |
| Friday | 99°F | Sunny | 5 mph SSW | 0% |
| Friday Night | 65°F | Clear | 3 to 7 mph SSE | 0% |
| Saturday | 100°F | Sunny | 5 mph SSW | 0% |
| Saturday Night | 65°F | Clear | 7 mph SSE | 0% |
| Sunday | 98°F | Sunny | 3 to 8 mph S | 0% |
| Sunday Night | 62°F | Mostly Clear | 7 to 10 mph SSE | 0% |
| Monday | 93°F | Sunny | 7 to 10 mph S | 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 Aug 4, 2026.