Dexter, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dexter, a city in Madison County, Iowa.
This Afternoon
64°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 64, with temperatures falling to around 58 in the afternoon. North northwest wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Dexter
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Showers And Thunderstorms | 8 to 14 mph NNW | 90% |
| Tonight | 45°F | Showers And Thunderstorms | 15 mph NW | 87% |
| Wednesday | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 15 to 18 mph W | 17% |
| Wednesday Night | 42°F | Mostly Cloudy then Slight Chance Rain Showers | 14 mph W | 22% |
| Thursday | 52°F | Chance Rain Showers | 13 mph NW | 52% |
| Thursday Night | 39°F | Mostly Cloudy | 10 mph N | 12% |
| Friday | 52°F | Partly Sunny | 3 to 8 mph N | 4% |
| Friday Night | 34°F | Mostly Cloudy | 3 mph WNW | 0% |
| Saturday | 57°F | Mostly Sunny | 5 mph WSW | 1% |
| Saturday Night | 38°F | Mostly Clear | 7 mph W | 5% |
| Sunday | 62°F | Sunny | 6 mph W | 5% |
| Sunday Night | 40°F | Mostly Clear | 8 mph SW | 1% |
| Monday | 66°F | Sunny | 8 to 13 mph WSW | 0% |
| Monday Night | 42°F | Mostly Clear | 7 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Dexter (41.515, -94.228). Updated through the day.
Growing snapshot for Dexter
Last spring frost
Apr 30
First fall frost
Oct 3
Growing season
157 days
Hardiness zone
5b
More local growing data for Dexter: nearby ZIP 50070 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Winterset 1S, Ia (14.3 mi from Dexter). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.