California Junction, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for California Junction, a community in Harrison County, Iowa.
This Afternoon
51°F
Mostly Cloudy
Mostly cloudy. High near 51, with temperatures falling to around 48 in the afternoon. West northwest wind around 13 mph, with gusts as high as 21 mph.
7-day forecast for California Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Mostly Cloudy | 13 mph WNW | 8% |
| Tonight | 41°F | Mostly Cloudy | 10 mph WNW | 19% |
| Thursday | 51°F | Mostly Cloudy | 9 to 13 mph NNW | 15% |
| Thursday Night | 36°F | Mostly Cloudy | 3 to 8 mph N | 1% |
| Friday | 49°F | Partly Sunny | 0 to 5 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 2 mph SSE | 0% |
| Saturday | 57°F | Mostly Sunny | 2 to 6 mph S | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph SW | 0% |
| Sunday | 62°F | Sunny | 2 mph WSW | 0% |
| Sunday Night | 39°F | Clear | 5 mph S | 0% |
| Monday | 67°F | Sunny | 5 to 8 mph SSW | 0% |
| Monday Night | 40°F | Clear | 1 to 5 mph WNW | 0% |
| Tuesday | 64°F | Sunny | 3 mph NNE | 1% |
| Tuesday Night | 42°F | Partly Cloudy | 2 mph ENE | 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
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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.