Clackamas (OR) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Clackamas.
Climate overview of Clackamas
Clackamas, Oregon, United States of America, sees big temperature differences between seasons, with July peaking at 28°C (82°F) and December dropping to 8°C (46°F).
With around 1157 mm (46 in) of annual rain/snowfall, Clackamas has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has a distinct dry season from July to August. The wettest month is December. The sunniest month is July, with 11.1 hours of sunshine per day on average.
Clackamas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Clackamas — and find the best time to visit.
Monthly Temperature in Clackamas
Visitors to Clackamas can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 28°C (82°F) in July. In December, the coolest month of the year, temperatures drop to a chilly 8°C (46°F).
At night, temperatures range from around 13°C (55°F) in July to 2°C (36°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Clackamas
Clackamas is known for its substantial rain/snowfall, with annual precipitation reaching 1157 mm (46 in). Clackamas can be quite wet during December, receiving approximately 194 mm (7.6 in) of precipitation over 20 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 12 mm (0.5 in) of precipitation spread across 4 rainy days. For more details, please visit our Clackamas Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Clackamas
Clackamas can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.1 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Clackamas by Month
The relative humidity is high throughout the year in Clackamas.
The city experiences its highest humidity in December, reaching 83%. In July, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Clackamas
The mean wind speed varies between 2 m/s (4 knots) and 4 m/s (8 knots) throughout the year. It is lowest in September and October and highest during January. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Clackamas
The weather does bring rainfall during this period, between 12 mm (0.5 in) and 72 mm (2.8 in).
Plan accordingly for January, November and December, when conditions bring the heaviest precipitation. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Clackamas
What is the best time to visit Clackamas?
May, June, July, August and September typically offer the most optimal weather in Clackamas. In contrast, January, March, November and December tend to have less optimal conditions. Clackamas has a distinct dry season from July to August.
What temperatures can I expect in Clackamas?
Daytime highs range from 8°C (46°F) in December to 28°C (82°F) in July. Nighttime lows range from 2°C (36°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Clackamas get?
Annual rainfall is around 1157 mm (46 in). December is the wettest month with 194 mm (7.6 in), while July is the driest with 12 mm (0.5 in).
How sunny is Clackamas?
Clackamas receives around 2,341 hours of sunshine per year. July is the sunniest month with 332 hours, while December is the cloudiest with just 64 hours. Overall, Clackamas enjoys abundant sunshine.
Clackamas 3-Day Forecast
Clackamas (OR) 3-Day Forecast
Clackamas on the map
Clackamas is highlighted — select any city to see its climate.
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