Alta, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a city in Buena Vista County, Iowa.
This Afternoon
55°F
Rain Showers
Rain showers. Cloudy. High near 55, with temperatures falling to around 48 in the afternoon. North northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 55°F | Rain Showers | 15 mph NNW | 94% |
| Tonight | 40°F | Rain Showers | 10 to 15 mph NW | 79% |
| Wednesday | 47°F | Rain Showers Likely | 15 mph WNW | 58% |
| Wednesday Night | 38°F | Chance Rain Showers | 10 mph WNW | 45% |
| Thursday | 48°F | Chance Rain Showers | 10 mph NW | 34% |
| Thursday Night | 34°F | Mostly Cloudy | 5 to 10 mph N | 9% |
| Friday | 48°F | Partly Sunny | 0 to 5 mph N | 5% |
| Friday Night | 32°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 52°F | Partly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 35°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 53°F | Sunny | 5 to 10 mph WNW | 4% |
| Sunday Night | 35°F | Mostly Clear | 5 mph WSW | 1% |
| Monday | 57°F | Sunny | 5 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 mph WNW | 1% |
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 Nov 3, 2026.