Altoona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altoona, a city in Polk County, Iowa.
Tonight
62°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of showers and thunderstorms before midnight, then showers and thunderstorms likely between midnight and 3am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 62, with temperatures rising to around 64 overnight. North wind 7 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Altoona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 to 10 mph N | 65% |
| Sunday | 66°F | Chance Rain Showers | 9 to 13 mph NNE | 40% |
| Sunday Night | 57°F | Rain Showers Likely | 12 mph NE | 55% |
| Monday | 59°F | Rain Showers | 12 mph NE | 81% |
| Monday Night | 53°F | Rain Showers | 10 mph NE | 77% |
| Tuesday | 60°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NE | 15% |
| Tuesday Night | 49°F | Partly Cloudy | 3 to 7 mph NE | 2% |
| Wednesday | 64°F | Mostly Sunny | 5 mph ENE | 1% |
| Wednesday Night | 53°F | Mostly Cloudy | 3 mph E | 6% |
| Thursday | 67°F | Slight Chance Rain Showers | 5 mph SE | 19% |
| Thursday Night | 58°F | Slight Chance Rain Showers | 3 mph ESE | 21% |
| Friday | 69°F | Slight Chance Rain Showers | 5 mph ESE | 21% |
| Friday Night | 60°F | Mostly Cloudy | 3 mph E | 9% |
| Saturday | 70°F | Chance Rain Showers | 7 mph ESE | 29% |
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 Sep 20, 2026.