South Portland Weather in September

In South Portland, September brings pleasant daytime temperatures around 22°C (72°F), with nights cooling to 12°C (54°F). Expect quite a bit of rainfall this month.

Rainfall in South Portland in September

Analyzing past climate data, one can expect approximately 10 days of rain, averaging 103 mm (4.1 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in South Portland in September

September in South Portland sees highs of 22°C (72°F) and lows of 12°C (54°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in South Portland in September

There are approximately 228 hours of sunshine this month, resulting in mostly clear days.

Average water temperature in September

At 16°C (61°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

So this is a great month to visit if you prefer dry days with pleasant temperatures.