Climate almanac
Decorah
Iowa, United States · 43.30°, -91.79°
What is the weather like in Decorah in May?
In May, Decorah is typically 71°F (22°C) during the day and 51°F (10°C) at night. The month brings about 5.1 in (131 mm) of precipitation in total.
- Average high71°F (22°C)
- Average low51°F (10°C)
- Precipitation5.1 in (131 mm)
- Clear or mostly clear days9
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)