Altoona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altoona, a city in Polk County, Iowa.
Overnight
45°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. Low around 45, with temperatures rising to around 47 overnight. West wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
7-day forecast for Altoona
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Slight Chance Rain Showers | 14 mph W | 19% |
| Wednesday | 52°F | Slight Chance Rain Showers then Cloudy | 16 mph W | 20% |
| Wednesday Night | 45°F | Cloudy then Slight Chance Rain Showers | 13 mph W | 21% |
| Thursday | 54°F | Chance Rain Showers then Cloudy | 13 mph NW | 39% |
| Thursday Night | 41°F | Mostly Cloudy | 7 to 10 mph N | 10% |
| Friday | 50°F | Mostly Sunny | 5 to 8 mph N | 5% |
| Friday Night | 31°F | Partly Cloudy | 3 mph ENE | 3% |
| Saturday | 53°F | Mostly Sunny | 3 mph SW | 1% |
| Saturday Night | 37°F | Mostly Clear | 5 mph WSW | 1% |
| Sunday | 59°F | Sunny | 6 mph W | 1% |
| Sunday Night | 38°F | Clear | 5 mph SW | 0% |
| Monday | 65°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 42°F | Clear | 6 mph W | 0% |
| Tuesday | 64°F | Sunny | 3 mph NNW | 0% |
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 Nov 4, 2026.