Afton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Afton, a city in Union County, Iowa.
Today
86°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Partly sunny. High near 86, with temperatures falling to around 83 in the afternoon. South southeast wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Afton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph SSE | 38% |
| Tonight | 63°F | Showers And Thunderstorms | 8 to 12 mph NNE | 84% |
| Wednesday | 73°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 9 mph NE | 78% |
| Wednesday Night | 59°F | Chance Showers And Thunderstorms | 3 to 9 mph NE | 43% |
| Thursday | 82°F | Mostly Sunny | 5 mph ENE | 7% |
| Thursday Night | 62°F | Mostly Clear | 3 mph SE | 6% |
| Friday | 86°F | Sunny | 3 to 8 mph S | 6% |
| Friday Night | 67°F | Mostly Clear | 7 mph S | 10% |
| Saturday | 90°F | Sunny | 5 to 12 mph SSW | 3% |
| Saturday Night | 73°F | Mostly Clear | 10 to 14 mph S | 9% |
| Sunday | 91°F | Mostly Sunny | 14 mph SSW | 9% |
| Sunday Night | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 14 mph S | 19% |
| Monday | 92°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 15 mph SSW | 19% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 12 to 16 mph S | 24% |
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 Aug 4, 2026.