Altoona, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altoona, a city in Polk County, Iowa.
This Afternoon
82°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 82, with temperatures falling to around 78 in the afternoon. West northwest wind around 8 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 |
|---|---|---|---|---|
| This Afternoon | 82°F | Chance Showers And Thunderstorms | 8 mph WNW | 26% |
| Tonight | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 9 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% |
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 19, 2026.