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

When	Temp	Forecast	Wind	Precip
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

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.