Gresham (OR) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to chilly in Gresham. Average daytime temperatures reach a comfortable 27°C (81°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 7°C (45°F).

At night, temperatures range from around 13°C (55°F) in August to 2°C (36°F) in December.

Check out our detailed temperature page for more information.

Temperature ranges by month

Gresham has a relatively rain/snowy climate with high precipitation levels, averaging 1369 mm (54 in) of rain/snowfall annually. Gresham can be quite wet during December, receiving approximately 219 mm (8.6 in) of precipitation over 23 rainy days.

In contrast, during the driest month (August), you will experience much drier conditions, with 14 mm (0.6 in) of precipitation spread across 5 rainy days. For more details, please visit our Gresham Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Gresham 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

The relative humidity is high throughout the year in Gresham.

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

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)