Afton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Afton, a city in Union County, Iowa.
Tonight
70°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South southwest wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Afton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph SSW | 33% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 7 to 10 mph WSW | 40% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 mph N | 60% |
| Sunday | 67°F | Showers And Thunderstorms Likely | 8 to 12 mph NNE | 58% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 12 mph NE | 58% |
| Monday | 60°F | Rain Showers Likely | 12 mph NE | 60% |
| Monday Night | 52°F | Chance Rain Showers | 7 to 10 mph NE | 52% |
| Tuesday | 59°F | Mostly Cloudy | 9 mph NE | 11% |
| Tuesday Night | 47°F | Mostly Cloudy | 3 to 7 mph ENE | 4% |
| Wednesday | 62°F | Mostly Sunny | 5 mph ENE | 2% |
| Wednesday Night | 51°F | Partly Cloudy | 3 mph E | 5% |
| Thursday | 64°F | Slight Chance Rain Showers | 5 mph ESE | 19% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 3 mph ESE | 16% |
| Friday | 66°F | Slight Chance Rain Showers | 2 to 6 mph ESE | 16% |
Forecast source: National Weather Service (api.weather.gov) for Afton (41.028, -94.195). Updated through the day.
Growing snapshot for Afton
Last spring frost
Apr 28
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5b
More local growing data for Afton: nearby ZIP 50830 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Creston 2 Sw, Ia (10.6 mi from Afton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.