Altoona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altoona, a city in Polk County, Iowa.
Today
83°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after noon. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. West wind 5 to 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Altoona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph W | 31% |
| Tonight | 63°F | Showers And Thunderstorms | 6 to 10 mph NNE | 91% |
| Wednesday | 73°F | Showers And Thunderstorms Likely | 6 mph NNE | 70% |
| Wednesday Night | 58°F | Chance Rain Showers | 5 mph NNE | 35% |
| Thursday | 80°F | Sunny | 3 mph ENE | 4% |
| Thursday Night | 62°F | Mostly Clear | 3 mph SE | 3% |
| Friday | 84°F | Sunny | 3 to 7 mph S | 6% |
| Friday Night | 67°F | Mostly Clear | 6 mph SSE | 13% |
| Saturday | 88°F | Sunny | 3 to 8 mph S | 11% |
| Saturday Night | 73°F | Mostly Clear | 10 mph SSW | 12% |
| Sunday | 89°F | Mostly Sunny | 10 mph S | 12% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms | 9 mph S | 28% |
| Monday | 89°F | Chance Showers And Thunderstorms then Mostly Sunny | 8 to 13 mph S | 28% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 12 mph ESE | 25% |
Forecast source: National Weather Service (api.weather.gov) for Altoona (41.646, -93.479). Updated through the day.
Growing snapshot for Altoona
Last spring frost
Apr 21
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
More local growing data for Altoona: nearby ZIP 50009 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Alleman
Ankeny
Bondurant
Clive
Des Moines
Elkhart
Granger
Grimes
Johnston
Maxwell
Mitchellville
Pleasant Hill
Polk City
Runnells
Saylorville
Sheldahl
Slater
Urbandale
West Des Moines
Windsor Heights
Climate data from the nearest NOAA station, Des Moines 17 E, Ia (10.8 mi from Altoona). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.