Dayton, IA Weather & Growing Conditions
Overnight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 68 overnight. South southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Chance Showers And Thunderstorms | 8 mph SSE | 53% |
| Saturday | 78°F | Chance Showers And Thunderstorms then Patchy Fog | 8 mph WNW | 42% |
| Saturday Night | 60°F | Slight Chance Rain Showers | 9 mph N | 24% |
| Sunday | 66°F | Chance Rain Showers | 13 mph NE | 38% |
| Sunday Night | 55°F | Chance Rain Showers | 10 mph ENE | 34% |
| Monday | 61°F | Chance Rain Showers | 10 mph ENE | 64% |
| Monday Night | 49°F | Chance Rain Showers | 5 to 8 mph ENE | 64% |
| Tuesday | 61°F | Partly Sunny | 7 mph ENE | 14% |
| Tuesday Night | 45°F | Partly Cloudy | 1 to 5 mph E | 2% |
| Wednesday | 66°F | Sunny | 5 mph E | 3% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph ESE | 7% |
| Thursday | 67°F | Slight Chance Rain Showers | 1 to 5 mph SE | 20% |
| Thursday Night | 54°F | Mostly Cloudy | 2 mph ESE | 12% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph ESE | 12% |
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 Sep 19, 2026.