Seaside
Oregon, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Seaside, OR

From atop a high cliff is this view of large rocks in the water on the Seaside shores, Oregon, overlooking the breathtaking sunset view
From atop a high cliff is this view of large rocks in the water on the Seaside shores, Oregon, overlooking the breathtaking sunset view
The first month of the autumn, September, is also an enjoyable month in Seaside, Oregon, with temperature in the range of an average low of 48.7°F (9.3°C) and an average high of 67.3°F (19.6°C).

Temperature

In Seaside, Oregon, the average high-temperature is almost the same as in August - a still enjoyable 67.3°F (19.6°C). In Seaside, the average low-temperature is 48.7°F (9.3°C).

Rainfall

In Seaside, in September, it is raining for 8.4 days, with typically 2.3" (58.2mm) of accumulated precipitation. In Seaside, Oregon, during the entire year, the rain falls for 177.3 days and collects up to 74.4" (1889.3mm) of precipitation.

Ocean temperature

In Seaside, the average water temperature is 56.1°F (13.4°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Seaside, the average length of the day in September is 12.5h.

What is the temperature in September in Seaside?

In September, in Seaside, Oregon, the average high-temperature is 67.3°F (19.6°C), and the average low-temperature is 48.7°F (9.3°C).

How much does it rain in Seaside in September?

In September, the rain falls for 8.4 days. Throughout September, 2.3" (58.2mm) of precipitation is accumulated.

What is the water temperature in September in Seaside?

In September, the average ocean temperature is 56.1°F (13.4°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Seaside have in September?

The average length of the day in September in Seaside, Oregon, is 12.5h.
Average temperature in September - Seaside, OR
  • Average high temperature in September: 67.3°F

The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (51°F).

  • Average low temperature in September: 48.7°F

Months with the highest average low temperature are July and August (52.5°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).

Average rainfall in September - Seaside, OR
  • Average rainfall in September: 2.3"

The wettest month (with the highest rainfall) is November (11.7").
The driest month (with the lowest rainfall) is August (1.2").

Average rainfall days in September - Seaside, OR
  • Average rainfall days in September: 8.4 days

Months with the highest number of rainy days are January and November (20.4 days).
The month with the lowest number of rainy days is August (6.9 days).

Average sea temperature in September - Seaside, OR
  • Average sea temperature in September: 56.2°F

The best month for swimming (with the highest average sea temperature) is July (57.2°F).
The coldest month (with the lowest average sea temperature) is February (48.1°F).

Average daylight in September - Seaside, OR
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).