Alta, IA Weather & Growing Conditions
Overnight
65°F
Areas Of Fog
Areas of fog and a chance of showers and thunderstorms. Cloudy, with a low around 65. Northwest wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Areas Of Fog | 5 mph NW | 46% |
| Saturday | 71°F | Areas Of Fog then Cloudy | 5 to 10 mph NNW | 55% |
| Saturday Night | 57°F | Slight Chance Rain Showers then Cloudy | 10 mph NNE | 20% |
| Sunday | 65°F | Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Sunday Night | 52°F | Rain Showers Likely | 10 mph ENE | 60% |
| Monday | 59°F | Rain Showers Likely | 10 mph ENE | 60% |
| Monday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 43% |
| Tuesday | 60°F | Mostly Sunny | 5 mph E | 9% |
| Tuesday Night | 44°F | Partly Cloudy | 5 mph ESE | 1% |
| Wednesday | 64°F | Mostly Sunny | 5 mph SE | 3% |
| Wednesday Night | 49°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SE | 22% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph SE | 22% |
| Thursday Night | 53°F | Mostly Cloudy | 5 mph SE | 14% |
| Friday | 69°F | Partly Sunny | 5 to 10 mph SE | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alta, IA
Last spring frost
Apr 25
First fall frost
Oct 13
Growing season
170 days
Hardiness zone
5a
Explore more for Alta, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Storm Lake, Ia (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.