Dedham, IA Weather & Growing Conditions
Tonight
42°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 42, with temperatures rising to around 45 overnight. Northwest wind 12 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 42°F | Rain Showers Likely | 12 to 17 mph NW | 67% |
| Wednesday | 49°F | Chance Rain Showers | 15 mph WNW | 32% |
| Wednesday Night | 40°F | Cloudy then Rain Showers Likely | 8 to 12 mph WNW | 57% |
| Thursday | 51°F | Rain Showers Likely | 10 mph NW | 56% |
| Thursday Night | 37°F | Mostly Cloudy | 3 to 8 mph N | 9% |
| Friday | 52°F | Partly Sunny | 1 to 5 mph N | 2% |
| Friday Night | 33°F | Mostly Cloudy | 1 mph NW | 0% |
| Saturday | 57°F | Mostly Sunny | 0 to 5 mph WSW | 2% |
| Saturday Night | 37°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 62°F | Sunny | 6 mph WSW | 6% |
| Sunday Night | 40°F | Mostly Clear | 6 mph SW | 1% |
| Monday | 65°F | Sunny | 6 to 10 mph WSW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 63°F | Mostly Sunny | 2 to 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dedham, IA
Last spring frost
Apr 27
First fall frost
Oct 10
Growing season
166 days
Hardiness zone
5a
Explore more for Dedham, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Carroll, Ia (10.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.