Hillsboro weather in September (Oregon, United States of America)

Is September a good time to explore Hillsboro weather-wise? Use this page to get an overview of the month’s weather conditions.

Temperatures

The weather in Hillsboro during September is usually perfect, offering high temperatures and moderate rainfall. Summer occurs in September. Daytime temperatures are expected to be around 25°C, cooling off to about 10°C at night.

Precipitation

Hillsboro in September usually receives moderate rainfall, averaging around 36 mm for the month. Typically, you can expect about 9 days of rain this month.

Average sunshine

There are approximately 236 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Hillsboro. May, June, July, August and September typically offer the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Hillsboro climate page with graphs.

 

Hillsboro, monthly averages in September

Min Temperature 10°C  

Max Temperature 25°C  

Chance of Rain 30%  

Precipitation 36 mm  

Rainy days 9 days  

Humidity 69% *  

Sunshine 236 hours *  

Percentage Sunshine *  

Data from: Portland, the United States of America (31 KM, 19 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Hillsboro, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

10/10

Cycling

10/10

Walking

10/10

Barbeque

9/10

Camping

5/10

Outdoor sports

10/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Hillsboro.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.