Dayton, IA Weather & Growing Conditions
Today
78°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 78, with temperatures falling to around 75 in the afternoon. North northwest wind around 9 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Showers And Thunderstorms | 9 mph NNW | 78% |
| Tonight | 59°F | Showers And Thunderstorms Likely | 3 to 8 mph N | 67% |
| Wednesday | 75°F | Slight Chance Showers And Thunderstorms | 6 mph NE | 22% |
| Wednesday Night | 53°F | Mostly Clear | 2 mph E | 3% |
| Thursday | 81°F | Sunny | 0 to 5 mph ESE | 1% |
| Thursday Night | 60°F | Mostly Clear | 3 mph SSE | 1% |
| Friday | 85°F | Sunny | 3 to 9 mph S | 7% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 3 to 8 mph S | 20% |
| Saturday | 89°F | Mostly Sunny | 3 to 10 mph S | 12% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 10 mph SSE | 17% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SSE | 17% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 9 mph SSE | 31% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 12 mph SSE | 31% |
| Monday Night | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 12 mph ESE | 29% |
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 Aug 4, 2026.