Renton Weather in September

Renton in September sees pleasant daytime temperatures of 21°C (70°F) and nighttime lows of 11°C (52°F). Moderate rainfall is typical, with around 54 mm (2.1 in) for the month.

Rainfall in Renton in September

Looking at the last 30 years, the data shows about 11 days with rain, averaging 54 mm (2.1 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Renton in September

The perfect temperature in Renton in September makes it a solid month to visit, with 21°C (70°F) during the day and 11°C (52°F) at night. During September, the summer season is in full swing. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Renton in September

Expect sunny days throughout the month, with an estimated 220 hours of sunshine. This makes it a pleasant time to visit Renton.

Wind Speed in Renton in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Renton.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• 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 Renton's climate page.

Renton Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 35%  

Precipitation 54 mm (2.1 in)  

Rainy days 11 days  

Humidity 73% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 220 hours *  

Percentage Sunshine 59% *  

* Data from: Seattle, the United States of America (8 KM, 4 Miles).

What to Wear in Renton in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Renton in September

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

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

8/10

Outdoor sports

10/10

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 Renton's climate page.

More climate data for Renton

Temperature Rainfall Sunshine Humidity Wind Speed

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