Hillsboro Weather in December

December in Hillsboro averages 7°C (45°F) during the day and 1°C (34°F) at night. It is the wettest month of the year, with 185 mm (7.3 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Hillsboro in December

During this month, the rain comes down heavily. A poncho is essential for staying dry. On average, there are about 22 days with rain during this month, averaging 185 mm (7.3 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Hillsboro in December

December in Hillsboro sees highs of 7°C (45°F) and lows of 1°C (34°F) overnight. Winter occurs in December. The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. Nights drop to 1°C (34°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. Typically, it's the chilliest month of the year. Ensure you're prepared by packing appropriate winter gear.

Sunshine in Hillsboro in December

This month is characterized by fewer sunny days, with about 64 hours of sunshine. It's great for those who appreciate cooler, less sunny days.

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

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.

Hillsboro Temperature in December

Min Temperature 1°C (34°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 73%  

Precipitation 185 mm (7.3 in)  

Rainy days 22 days  

Humidity 83% *  

Sunshine 64 hours *  

Percentage Sunshine *  

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

What to Wear in Hillsboro in December

We recommend to layer up for chilly conditions in Hillsboro in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Also bring a poncho, it will rain a lot! Waterproof everything you can. With limited sunshine expected, sunglasses aren't a priority for packing.

What To Do in Hillsboro in December

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

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

3/10

Outdoor sports

4/10

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.