Forest Grove Weather in December

In Forest Grove, December brings low daytime temperatures around 7°C (45°F), with nights cooling to 1°C (34°F). It is the wettest month of the year, so expect more rainfall than usual.

Rainfall in Forest Grove in December

This month experiences the most intense rain of the year, with heavy showers. Be prepared with a poncho to stay dry. Expect around 21 days of rain based on historical data, with 216 mm (8.5 in) average. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.

Temperature in Forest Grove in December

December in Forest Grove brings typical temperatures with highs around 7°C (45°F) and lows of 1°C (34°F). This month falls in the winter season. It stays cool throughout the day, so warm layers are a good idea from morning to evening. At 1°C (34°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions. It's generally the coldest month of the year, making it essential to pack warm layers and winter accessories.

Sunshine in Forest Grove in December

The month is characterized by fewer sunny days, with roughly 64 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.

December in Forest Grove can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.

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 Forest Grove's climate page.

Forest Grove Temperature in December

Min Temperature 1°C (34°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 70%  

Precipitation 216 mm (8.5 in)  

Rainy days 21 days  

Humidity 83% *  

Sunshine 64 hours *  

Percentage Sunshine *  

* Data from: Portland, the United States of America (40 KM, 25 Miles).

What to Wear in Forest Grove in December

Dress warmly and in layers for your trip to Forest Grove in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.

What To Do in Forest Grove 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 Forest Grove's climate page.

More climate data for Forest Grove

Temperature Rainfall Sunshine Humidity

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