Seaside Weather in September

September in Seaside brings pleasant temperatures, with highs of 21°C (70°F) and nights dropping to 10°C (50°F). Rainfall is on the higher side this month, averaging around 81 mm (3.2 in), so keep a rain jacket handy.

Rainfall in Seaside in September

Based on our climate data of the past 30 years, about 11 days of rain are anticipated, with 81 mm (3.2 in) on average. 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 Seaside in September

Seaside in September is worth a visit. The temperature is perfect, with 21°C (70°F) during the day and 10°C (50°F) at night. Summer occurs in September. Conditions are often most pleasant around the middle of the day. Nights fall to 10°C (50°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Seaside in September

Expect a lot of sunshine this month, with about 236 hours of sun. These sunny conditions add to the overall experience.

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

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• August

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• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Seaside's climate page.

Seaside Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 36%  

Precipitation 81 mm (3.2 in)  

Rainy days 11 days  

Sunshine 236 hours *  

Percentage Sunshine *  

* Data from: Astoria, the United States of America (22 KM, 14 Miles).

What to Wear in Seaside in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Seaside in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Seaside's climate page.

More climate data for Seaside

Temperature Rainfall Sunshine

See the full Seaside climate overview or explore weather in the United States of America.