Climate almanac
Sidney
Montana, United States · 47.72°, -104.16°
What is the weather like in Sidney in September?
In September, Sidney is typically 76°F (24°C) during the day and 50°F (10°C) at night. The month brings about 1.9 in (48 mm) of precipitation in total.
- Average high76°F (24°C)
- Average low50°F (10°C)
- Precipitation1.9 in (48 mm)
- Clear or mostly clear days16
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)