Umatilla Weather in September

Umatilla in September averages 26°C (79°F) during the day and 10°C (50°F) at night. Minimal rainfall is typical for this time of year.

Rainfall in Umatilla in September

Expect around 4 days of rain based on historical data, with 9.7 mm (0.4 in) average. The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.

Temperature in Umatilla in September

September is one of the better months to visit Umatilla. Expect 26°C (79°F) during the day and 10°C (50°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights drop to around 10°C (50°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.

If your ideal day consists of dry skies and pleasant temperatures, April, May, June, September and October typically offer the best circumstances for Umatilla.

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• January
• February
• March
• April

• 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 Umatilla's climate page.

Umatilla Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 26°C (79°F)  

Chance of Rain 13%  

Precipitation 9.7 mm (0.4 in)  

Rainy days 4 days  

What to Wear in Umatilla in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home.

What To Do in Umatilla in September

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

Cycling

8/10

Walking

8/10

Camping

10/10

Outdoor sports

8/10

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 Umatilla's climate page.

More climate data for Umatilla

Temperature Rainfall

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