California Junction, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for California Junction, a community in Harrison County, Iowa.
Today
51°F
Chance Rain Showers then Mostly Cloudy
A chance of rain showers before noon. Mostly cloudy, with a high near 51. West northwest wind 10 to 14 mph, with gusts as high as 23 mph.
7-day forecast for California Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Chance Rain Showers then Mostly Cloudy | 10 to 14 mph WNW | 14% |
| Tonight | 41°F | Mostly Cloudy then Slight Chance Light Rain | 10 mph WNW | 18% |
| Thursday | 51°F | Slight Chance Light Rain then Mostly Cloudy | 12 mph NNW | 16% |
| Thursday Night | 37°F | Mostly Cloudy | 3 to 8 mph NNW | 0% |
| Friday | 51°F | Mostly Sunny | 0 to 3 mph N | 1% |
| Friday Night | 33°F | Partly Cloudy | 2 mph SE | 0% |
| Saturday | 55°F | Mostly Sunny | 5 mph SSW | 0% |
| Saturday Night | 36°F | Mostly Clear | 2 mph WSW | 0% |
| Sunday | 60°F | Sunny | 5 mph WSW | 0% |
| Sunday Night | 40°F | Clear | 5 mph S | 0% |
| Monday | 66°F | Sunny | 5 to 8 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 3 mph WNW | 0% |
| Tuesday | 64°F | Mostly Sunny | 3 mph NNW | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 2 mph ESE | 0% |
Forecast source: National Weather Service (api.weather.gov) for California Junction (41.560, -95.995). Updated through the day.
Growing snapshot for California Junction
Last spring frost
Apr 29
First fall frost
Oct 8
Growing season
162 days
Hardiness zone
5b
More local growing data for California Junction: nearby ZIP 51555 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
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River Sioux
Woodbine
Climate data from the nearest NOAA station, Logan, Ia (8.5 mi from California Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.