Oregon weather in September 2025
Oregon weather in September 2025
Day
20 °C
Night
9 °C
Sea
14 °C
Precipitation
69 mm
in month
Rainy days
8 days
in month
Daylight
12 hours
average
Sunshine
7 hours
average
Humidity
77 %
Day
20 °C
Night
9 °C
Sea
14 °C
Precipitation
69 mm
in month
Rainy days
8 days
in month
Daylight
12 hours
average
Sunshine
7 hours
average
Humidity
77 %
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Weather overview and FAQs
Weather overview
In Oregon in September, the average air temperature ranges from 20 °C (68 °F) during the day to 9 °C (49 °F) at night. There are 8 days of rain on average, where the rainfall is 69 mm (2.72 in).
Are there good conditions to visit in September in Oregon?
In September in Oregon, there are ideal conditions for a vacation. Especially for non-beach activities, such as hiking or sightseeing. You can expect just 8 days of rain during the month, taking an umbrella is not necessary. There are some people, who may feel a slight chill at 20 °C (68 °F), but others will feel perfectly fine. The temperature of 9 °C (49 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What temperature can I expect during the day in Oregon in September?
In September in Oregon, the average daily temperatures will be 20 °C (68 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
What is the night temperature in September in Oregon?
The average night temperature in Oregon in September is 9 °C (49 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
How many days of precipitation on average can I expect in Oregon in September?
There are 8 days, which are rainy in Oregon in September, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.0 days of the week, or in general - 28 % days.
Is there a wet season in September in Oregon?
No, there is no wet season in Oregon in September - you can expect 8 days of rain during the month.
Is there a dry season in Oregon in September?
Yes, there is a dry season in Oregon in September with just 8 days during the month being rainy.
What level of humidity is to expect in Oregon in September?
In September in Oregon, expect humidity around 77 %.
How many sunny hours can I expect in Oregon in September?
There is an average length of sunshine of 7 hours per day in September in Oregon.
Is the weather in Oregon warmer in September than in August?
No, September is not warmer in Oregon than August.
How windy is Oregon in September?
An average wind scale that can be expected in Oregon in September is 4.
How long is the day (from dawn till dusk) in Oregon in September?
The length of daylight in Oregon in September is 12 hours.
Is the sea in Oregon warmer in September than in August?
No, the sea temperature in Oregon in September is not higher than in August.
Is Oregon rainier in September than in October?
No, September in Oregon is not a rainier month than October.
How does the sea temperature evolve during the month in Oregon in September?
Oregon has a decreasing trend of the sea temperature during September - from 14 °C (57 °F) in the first days of the month to 13 °C (56 °F) in the last days of the month.