Climate almanac
Riverhead
New York, United States · 40.92°, -72.66°
What is the weather like in Riverhead in September?
In September, Riverhead is typically 73°F (23°C) during the day and 66°F (19°C) at night. The month brings about 3.9 in (99 mm) of precipitation in total.
- Average high73°F (23°C)
- Average low66°F (19°C)
- Precipitation3.9 in (99 mm)
- Clear or mostly clear days11
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)