Dedham, IA Weather & Growing Conditions
Overnight
64°F
Mostly Cloudy
Mostly cloudy. Low around 64, with temperatures rising to around 67 overnight. Southwest wind around 6 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Mostly Cloudy | 6 mph SW | 14% |
| Tuesday | 78°F | Chance Showers And Thunderstorms | 6 to 10 mph NNW | 38% |
| Tuesday Night | 59°F | Showers And Thunderstorms | 2 to 9 mph NNE | 84% |
| Wednesday | 73°F | Chance Showers And Thunderstorms | 2 to 6 mph ENE | 34% |
| Wednesday Night | 55°F | Mostly Clear | 0 to 5 mph E | 5% |
| Thursday | 81°F | Sunny | 0 to 5 mph ESE | 1% |
| Thursday Night | 61°F | Mostly Clear | 5 mph SSE | 3% |
| Friday | 86°F | Sunny | 3 to 8 mph S | 4% |
| Friday Night | 67°F | Mostly Clear | 7 mph S | 9% |
| Saturday | 90°F | Sunny | 3 to 12 mph S | 7% |
| Saturday Night | 71°F | Mostly Clear | 13 mph S | 14% |
| Sunday | 90°F | Mostly Sunny | 12 mph S | 14% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 12 mph SSE | 29% |
| Monday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 13 mph S | 29% |
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 Aug 4, 2026.