Dayton, IA Weather & Growing Conditions
Today
50°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. High near 50, with temperatures falling to around 47 in the afternoon. West wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 50°F | Slight Chance Rain Showers | 14 mph W | 18% |
| Tonight | 42°F | Chance Rain Showers | 12 mph WNW | 41% |
| Thursday | 53°F | Rain Showers Likely then Mostly Cloudy | 12 mph NW | 57% |
| Thursday Night | 37°F | Mostly Cloudy | 5 to 9 mph N | 5% |
| Friday | 50°F | Mostly Sunny | 5 mph N | 4% |
| Friday Night | 29°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 3 mph SW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph W | 1% |
| Sunday | 59°F | Sunny | 5 mph W | 1% |
| Sunday Night | 37°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 65°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 63°F | Sunny | 3 mph NNW | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 2 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Dayton, IA
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
165 days
Hardiness zone
5a
Explore more for Dayton, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Boone, Ia (17.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.