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Worthington, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Worthington, a city in Dubuque County, Iowa.

This Afternoon
75°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 75, with temperatures falling to around 73 in the afternoon. South wind around 5 mph. Chance of precipitation is 70%.

7-day forecast for Worthington

WhenTempForecastWindPrecip
This Afternoon 75°F Showers And Thunderstorms Likely 5 mph S 71%
Tonight 60°F Showers And Thunderstorms Likely 5 to 10 mph NE 69%
Sunday 66°F Chance Rain Showers 15 mph NE 45%
Sunday Night 54°F Chance Rain Showers 10 to 15 mph NE 36%
Monday 62°F Rain Showers Likely 15 mph NE 63%
Monday Night 50°F Rain Showers Likely 10 to 15 mph NE 63%
Tuesday 61°F Chance Rain Showers 10 to 15 mph NE 46%
Tuesday Night 47°F Partly Cloudy 5 to 10 mph NE 8%
Wednesday 64°F Mostly Sunny 5 to 10 mph NE 2%
Wednesday Night 50°F Partly Cloudy 0 to 5 mph NE 2%
Thursday 66°F Partly Sunny 0 to 5 mph E 10%
Thursday Night 54°F Slight Chance Rain Showers 0 mph 15%
Friday 69°F Partly Sunny 0 to 5 mph E 10%
Friday Night 54°F Mostly Cloudy 0 mph 8%

Forecast source: National Weather Service (api.weather.gov) for Worthington (42.398, -91.121). Updated through the day.

Growing snapshot for Worthington

Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
164 days
Hardiness zone
5a

More local growing data for Worthington: nearby ZIP 52078 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Cascade, Ia (8.6 mi from Worthington). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.