Climate almanac
Johnston
Iowa, United States · 41.67°, -93.70°
What is the weather like in Johnston in January?
In January, Johnston is typically 31°F (-1°C) during the day and 16°F (-9°C) at night. The month brings about 1.5 in (39 mm) of precipitation in total. Snowfall averages about 6.9 in (176 mm) over the month.
- Average high31°F (-1°C)
- Average low16°F (-9°C)
- Precipitation1.5 in (39 mm)
- Clear or mostly clear days8
- Snowfall6.9 in (176 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)