Climate almanac
Johnston
Iowa, United States · 41.67°, -93.70°
What is the weather like in Johnston in July?
In July, Johnston is typically 86°F (30°C) during the day and 67°F (20°C) at night. The month brings about 3.8 in (95 mm) of precipitation in total.
- Average high86°F (30°C)
- Average low67°F (20°C)
- Precipitation3.8 in (95 mm)
- Clear or mostly clear days15
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)