St. Donatus, IA Weather & Growing Conditions
This Afternoon
77°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 77. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Showers And Thunderstorms | 5 to 10 mph S | 76% |
| Tonight | 61°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph NW | 80% |
| Sunday | 67°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Sunday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Monday | 63°F | Chance Rain Showers | 15 mph NE | 33% |
| Monday Night | 50°F | Chance Rain Showers | 10 mph NE | 26% |
| Tuesday | 62°F | Chance Rain Showers then Partly Sunny | 10 mph NE | 26% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 6% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Friday Night | 52°F | Partly Cloudy | 0 to 5 mph E | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Donatus, IA
Last spring frost
Apr 26
First fall frost
Oct 15
Growing season
170 days
Hardiness zone
5a
Explore more for St. Donatus, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Galena, Il (8.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.