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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

WhenTempForecastWindPrecip
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.