Altoona, IA Weather & Growing Conditions
Overnight
70°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South wind around 2 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Chance Showers And Thunderstorms | 2 mph S | 38% |
| Saturday | 81°F | Chance Showers And Thunderstorms | 3 to 8 mph WSW | 51% |
| Saturday Night | 62°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 42% |
| Sunday | 66°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 9 to 13 mph NNE | 45% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 12 mph NE | 57% |
| Monday | 61°F | Rain Showers Likely | 13 mph NE | 57% |
| Monday Night | 52°F | Rain Showers Likely | 10 mph NE | 55% |
| Tuesday | 60°F | Partly Sunny | 9 mph ENE | 12% |
| Tuesday Night | 47°F | Partly Cloudy | 3 to 7 mph ENE | 2% |
| Wednesday | 65°F | Sunny | 5 mph ENE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph E | 4% |
| Thursday | 66°F | Slight Chance Rain Showers | 5 mph ESE | 21% |
| Thursday Night | 57°F | Mostly Cloudy | 3 mph E | 8% |
| Friday | 68°F | Partly Sunny | 6 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Altoona, IA
Last spring frost
Apr 21
First fall frost
Oct 15
Growing season
174 days
Hardiness zone
5b
Explore more for Altoona, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Des Moines 17 E, Ia (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.