Hillsboro Weather in September

Hillsboro in September sees high daytime temperatures of 25°C (77°F) and nighttime lows of 10°C (50°F). Moderate rainfall is typical, with around 36 mm (1.4 in) for the month.

Rainfall in Hillsboro in September

The climate data from previous years indicates about 9 days of rain, averaging 36 mm (1.4 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Hillsboro in September

If you're visiting Hillsboro in September, expect perfect temperatures with highs of 25°C (77°F) and overnight lows of 10°C (50°F). September is typically considered a summer month. This kind of day-to-night contrast is typical for this time of year. 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 Hillsboro in September

The city usually sees around 236 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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Check the conditions for any month of the year.

• 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 Hillsboro's climate page.

Hillsboro Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 30%  

Precipitation 36 mm (1.4 in)  

Rainy days 9 days  

Humidity 69% *  

Sunshine 236 hours *  

Percentage Sunshine *  

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

What to Wear in Hillsboro in September

For Hillsboro in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Some rain is possible, so pack something to handle light showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Hillsboro in September

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

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 Hillsboro's climate page.

More climate data for Hillsboro

Temperature Rainfall Sunshine Humidity

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