Alta, IA Weather & Growing Conditions
This Afternoon
55°F
Chance Rain Showers
A chance of 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 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 55°F | Chance Rain Showers | 15 mph NNW | 49% |
| Tonight | 40°F | Rain Showers | 15 mph NW | 80% |
| Wednesday | 47°F | Rain Showers Likely | 15 mph WNW | 73% |
| Wednesday Night | 38°F | Rain Showers Likely | 10 to 15 mph WNW | 74% |
| Thursday | 48°F | Chance Rain Showers | 10 to 15 mph NNW | 50% |
| Thursday Night | 34°F | Mostly Cloudy | 5 to 10 mph N | 3% |
| Friday | 48°F | Partly Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 31°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 55°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 35°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 58°F | Sunny | 5 mph WSW | 5% |
| Sunday Night | 38°F | Mostly Clear | 5 to 10 mph SSW | 1% |
| Monday | 61°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph NW | 0% |
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 Nov 3, 2026.