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

When	Temp	Forecast	Wind	Precip
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

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.