Dayton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dayton, a city in Webster County, Iowa.
Today
74°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 74, with temperatures falling to around 70 in the afternoon. North northwest wind 5 to 8 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dayton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Chance Showers And Thunderstorms | 5 to 8 mph NNW | 31% |
| Tonight | 59°F | Slight Chance Showers And Thunderstorms | 9 mph N | 24% |
| Sunday | 66°F | Chance Drizzle | 13 mph NE | 37% |
| Sunday Night | 55°F | Chance Rain Showers | 10 mph ENE | 50% |
| Monday | 61°F | Chance Rain Showers | 10 mph ENE | 53% |
| Monday Night | 49°F | Chance Rain Showers | 5 to 8 mph ENE | 53% |
| Tuesday | 61°F | Partly Sunny | 7 mph ENE | 9% |
| Tuesday Night | 45°F | Partly Cloudy | 5 mph E | 1% |
| Wednesday | 65°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph ESE | 7% |
| Thursday | 66°F | Slight Chance Rain Showers | 1 to 5 mph SE | 18% |
| Thursday Night | 54°F | Mostly Cloudy | 2 mph ESE | 10% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph ESE | 10% |
| Friday Night | 55°F | Mostly Cloudy | 3 mph SE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Dayton (42.262, -94.071). Updated through the day.
Growing snapshot for Dayton
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
165 days
Hardiness zone
5a
More local growing data for Dayton: nearby ZIP 50530 weather · frost dates · planting calendar · Iowa frost dates
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Climate data from the nearest NOAA station, Boone, Ia (17.5 mi from Dayton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.