Alta, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a city in Buena Vista County, Iowa.
Overnight
64°F
Areas Of Fog
Areas of fog before 4am, then areas of fog and a chance of showers and thunderstorms. Cloudy, with a low around 64. Northwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Areas Of Fog | 5 mph NW | 43% |
| Saturday | 71°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NNW | 34% |
| Saturday Night | 57°F | Slight Chance Rain Showers then Cloudy | 10 mph NNE | 18% |
| Sunday | 65°F | Slight Chance Rain Showers | 10 to 15 mph NE | 23% |
| 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 | 21% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph SE | 21% |
| Thursday Night | 53°F | Mostly Cloudy | 5 mph SE | 14% |
| Friday | 69°F | Partly Sunny | 5 mph SE | 14% |
Forecast source: National Weather Service (api.weather.gov) for Alta (42.672, -95.305). Updated through the day.
Growing snapshot for Alta
Last spring frost
Apr 25
First fall frost
Oct 13
Growing season
170 days
Hardiness zone
5a
More local growing data for Alta: nearby ZIP 51002 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Storm Lake, Ia (7.4 mi from Alta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.