Alta, IA Weather & Growing Conditions
Today
70°F
Patchy Smoke
Patchy smoke and scattered showers and thunderstorms before 11am, then patchy smoke and showers and thunderstorms between 11am and 4pm, then scattered showers and thunderstorms. Mostly cloudy, with a high near 70. North wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Patchy Smoke | 5 to 10 mph N | 82% |
| Tonight | 56°F | Patchy Smoke then Mostly Cloudy | 0 to 5 mph NNE | 61% |
| Wednesday | 74°F | Partly Sunny | 0 to 5 mph ENE | 4% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 81°F | Sunny | 5 to 10 mph S | 1% |
| Thursday Night | 61°F | Mostly Clear | 5 to 10 mph SSE | 4% |
| Friday | 85°F | Sunny | 5 to 15 mph SSW | 4% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph S | 16% |
| Saturday | 89°F | Sunny | 5 to 15 mph S | 9% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 22% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SSE | 22% |
| Sunday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph SE | 24% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph ESE | 24% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph ENE | 29% |
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 Aug 4, 2026.