Nantucket Weather in September

September in Nantucket sees daytime temperatures around 22°C (72°F) and lows of 15°C (59°F) at night. With around 83 mm (3.3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Nantucket in September

You can typically expect 9 days of rain this month, averaging around 83 mm (3.3 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Nantucket in September

September tends to be one of the excellent months in Nantucket, with 22°C (72°F) in the afternoon and 15°C (59°F) overnight. This month falls in the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows of 15°C (59°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Nantucket in September

The city usually sees around 231 hours of sunlight, indicating many sunny days , a great month for sightseeing.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for Nantucket.