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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.

This Afternoon
74°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy. High near 74, with temperatures falling to around 68 in the afternoon. North wind around 9 mph. Chance of precipitation is 20%.

7-day forecast for Dayton

WhenTempForecastWindPrecip
This Afternoon 74°F Slight Chance Showers And Thunderstorms 9 mph N 19%
Tonight 59°F Slight Chance Showers And Thunderstorms then Slight Chance Drizzle 9 mph N 18%
Sunday 65°F Chance Drizzle 13 mph NE 41%
Sunday Night 54°F Rain Showers Likely 10 mph ENE 57%
Monday 58°F Rain Showers 10 mph NE 85%
Monday Night 50°F Rain Showers 5 to 8 mph NE 75%
Tuesday 61°F Partly Sunny 7 mph ENE 13%
Tuesday Night 46°F Partly Cloudy 5 mph ENE 3%
Wednesday 65°F Mostly Sunny 5 mph E 1%
Wednesday Night 51°F Partly Cloudy 2 mph ESE 13%
Thursday 67°F Slight Chance Rain Showers 5 mph SE 24%
Thursday Night 56°F Slight Chance Rain Showers 3 mph SE 22%
Friday 70°F Slight Chance Rain Showers 5 mph ESE 18%
Friday Night 57°F Mostly Cloudy then Slight Chance Rain Showers 3 mph ESE 15%

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.