St. Donatus, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Donatus, a city in Jackson County, Iowa.
Tonight
61°F
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
A chance of rain showers before 10pm, then a chance of showers and thunderstorms between 10pm and 11pm, then showers and thunderstorms likely between 11pm and 1am, then showers and thunderstorms between 1am and 5am, then rain showers likely and patchy fog. Some of the storms could produce heavy rain. Mostly cloudy. Low around 61, with temperatures rising to around 64 overnight. Northeast wind 0 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for St. Donatus
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 10 mph NE | 77% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Sunday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Monday | 63°F | Rain Showers Likely | 10 to 15 mph NE | 58% |
| Monday Night | 51°F | Rain Showers Likely | 10 mph NE | 58% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph NE | 51% |
| Tuesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 64°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph NE | 9% |
| Thursday Night | 54°F | Mostly Cloudy | 0 mph | 13% |
| Friday | 69°F | Partly Sunny | 0 to 5 mph NE | 8% |
| Friday Night | 54°F | Mostly Cloudy | 0 mph | 8% |
| Saturday | 70°F | Mostly Sunny | 0 to 5 mph E | 8% |
Forecast source: National Weather Service (api.weather.gov) for St. Donatus (42.362, -90.542). Updated through the day.
Growing snapshot for St. Donatus
Last spring frost
Apr 26
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
5a
More local growing data for St. Donatus: nearby ZIP 52071 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Andrew
Baldwin
Bellevue
La Motte
Maquoketa
Miles
Monmouth
Preston
Sabula
Spragueville
Springbrook
Zwingle
Climate data from the nearest NOAA station, Galena, Il (8.4 mi from St. Donatus). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.