Willamette National Forest (OR) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Willamette National Forest.
Climate overview of Willamette National Forest
Willamette National Forest, Oregon, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 23°C (73°F) in July, while winters cool to 4°C (39°F) in December.
With around 2526 mm (99 in) of annual rain/snowfall, Willamette National Forest has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has distinct dry (July to August) and wet (October to April) seasons, with warm summers and cold winters. The wettest month is December.
Willamette National Forest Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Willamette National Forest - and find the best time to visit.
Monthly Temperature in Willamette National Forest
Depending on the time of the year, temperatures range from comfortable to chilly in Willamette National Forest. Average daytime temperatures reach a comfortable 23°C (73°F) in July. In December, the coolest month of the year, temperatures drop to a chilly 4°C (39°F).
At night, temperatures range from around 9°C (48°F) in July to -3°C (27°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Willamette National Forest
Willamette National Forest has a relatively rain/snowy climate with high precipitation levels, averaging 2526 mm (99 in) of rain/snowfall annually. Willamette National Forest can be quite wet during December, receiving approximately 443 mm (17 in) of precipitation over 23 snowy/rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 20 mm (0.8 in) of precipitation spread across 4 rainy days. For more details, please visit our Willamette National Forest Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Willamette National Forest
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July, August and September
- Warmest weather: July and August
- Fewest rainy days: July and August
- Wettest months: January, February, March, April, November and December, when rainfall is highest.
- Seasonal pattern: Distinct dry (July to August) and wet (October to April) seasons, with warm summers and cold winters
- Coldest conditions: December, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Willamette National Forest
What is the best time to visit Willamette National Forest?
July, August and September typically offer the most optimal weather in Willamette National Forest. In contrast, January, February, March, April, October, November and December tend to have less optimal conditions. Willamette National Forest has distinct dry (July to August) and wet (October to April) seasons, with warm summers and cold winters.
What temperatures can I expect in Willamette National Forest?
Daytime highs range from 4°C (39°F) in December to 23°C (73°F) in July. Nighttime lows range from -3°C (27°F) to 9°C (48°F). Temperatures vary considerably through the year.
How much rain does Willamette National Forest get?
Annual rainfall is around 2526 mm (99 in). December is the wettest month with 443 mm (17 in), while July is the driest with 20 mm (0.8 in). In the coldest months, precipitation may fall as snow/rain.
Willamette National Forest 3-Day Forecast
Willamette National Forest (OR) 3-Day Forecast
Willamette National Forest on the map
Willamette National Forest is highlighted - select any city to see its climate.
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