Worthington, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Worthington, a city in Dubuque County, Iowa.
Today
78°F
Occasional Showers And Thunderstorms then Showers And Thunderstorms Likely
Occasional showers and thunderstorms before 11am, then showers and thunderstorms likely. Some of the storms could produce heavy rain. Mostly cloudy, with a high near 78. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Worthington
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Occasional Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 78% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 10 mph NW | 80% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Sunday Night | 54°F | Chance Rain Showers | 15 mph NE | 36% |
| Monday | 63°F | Chance Rain Showers | 15 mph NE | 36% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Tuesday | 62°F | Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 38% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 65°F | Sunny | 5 to 10 mph NE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 66°F | Mostly Sunny | 5 mph NE | 8% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 5% |
| Friday | 69°F | Mostly Sunny | 5 mph E | 5% |
| Friday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 5% |
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
Nearby towns & communities
Asbury
Balltown
Bankston
Bernard
Centralia
Dubuque
Durango
Epworth
Farley
Graf
Holy Cross
Luxemburg
New Vienna
Peosta
Rickardsville
Sageville
Sherrill
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.