Climate almanac
Caernarfon
Wales, United Kingdom · 53.14°, -4.27°
What is the weather like in Caernarfon in September?
In September, Caernarfon is typically 63°F (17°C) during the day and 52°F (11°C) at night. The month brings about 4.4 in (112 mm) of precipitation in total.
- Average high63°F (17°C)
- Average low52°F (11°C)
- Precipitation4.4 in (112 mm)
- Clear or mostly clear days2
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)