Portland Weather in September

September in Portland sees daytime temperatures around 25°C (77°F) and lows of 12°C (54°F) at night. With around 77 mm (3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Portland in September

Rain is expected on roughly 11 days, totalling around 77 mm (3 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Portland in September

September is a excellent month in Portland, with 25°C (77°F) during the day and 12°C (54°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. 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 Portland in September

The days are predominantly sunny, with an estimated total of around 256 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If your ideal day consists of dry skies and pleasant temperatures, July and September typically offer the best circumstances for Portland.