Alta, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alta, a city in Buena Vista County, Iowa.
Today
73°F
Patchy Smoke
Patchy smoke and a chance of showers and thunderstorms before 1pm, then patchy smoke and showers and thunderstorms likely between 1pm and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely. Mostly cloudy. High near 73, with temperatures falling to around 69 in the afternoon. North wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Alta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Patchy Smoke | 5 to 10 mph N | 67% |
| Tonight | 56°F | Showers And Thunderstorms Likely then Mostly Cloudy | 0 to 5 mph NNE | 70% |
| Wednesday | 74°F | Partly Sunny | 0 to 5 mph ENE | 5% |
| Wednesday Night | 53°F | Mostly Clear | 0 to 5 mph SE | 1% |
| Thursday | 81°F | Sunny | 0 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 | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph SE | 25% |
| Monday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph ESE | 25% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph ENE | 29% |
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 Aug 4, 2026.