Ione, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ione, a city in Amador County, California.
This Afternoon
64°F
Slight Chance Light Rain
A slight chance of rain. Partly sunny. High near 64, with temperatures falling to around 59 in the afternoon. East southeast wind around 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Ione
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Slight Chance Light Rain | 3 mph ESE | 16% |
| Tonight | 45°F | Partly Cloudy | 2 to 6 mph ENE | 11% |
| Wednesday | 67°F | Sunny | 3 to 8 mph NNW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 3 mph NE | 0% |
| Thursday | 69°F | Sunny | 1 to 5 mph NNW | 0% |
| Thursday Night | 46°F | Clear | 5 mph ENE | 0% |
| Friday | 70°F | Sunny | 3 mph W | 0% |
| Friday Night | 50°F | Clear | 2 to 6 mph ENE | 0% |
| Saturday | 74°F | Sunny | 5 mph W | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 to 6 mph ENE | 0% |
| Sunday | 74°F | Sunny | 1 to 5 mph WNW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 5 mph NE | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph SW | 1% |
| Monday Night | 51°F | Partly Cloudy | 3 mph ENE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Ione (38.363, -120.948). Updated through the day.
Growing snapshot for Ione
Last spring frost
Mar 4
First fall frost
Dec 11
Growing season
285 days
Hardiness zone
9b
More local growing data for Ione: nearby ZIP 95640 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Amador City
Buena Vista
Drytown
Fiddletown
Jackson
Lockwood
Martell
Mokelumne Hill
Paloma
Pine Grove
Pioneer
Plymouth
Red Corral
River Pines
Sutter Creek
Volcano
Climate data from the nearest NOAA station, Sutter Hill Cdf, Ca (7.9 mi from Ione). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.