Oregon Weather by Month: Temperature & Rainfall Guide

Oregon is a region in the United States of America. Many people wonder what the weather conditions are in Oregon over the year. What is the best time to visit Oregon?

This page shows the average weather conditions by month in Oregon over the year in: January, February, March, April, May, June, July, August, September, October, November, December.

In January the weather in Oregon is generally less favorable. January is a winter month. The temperatures range from very low in Wallowa Lake with 1°C (34°F) to moderate in Brookings with 13°C (55°F).

Find more detailed climate information for Oregon in January here.

In February the weather in Oregon ranges from less favorable in Seaside to mixed in Portland. February is a winter month. The temperatures range from low in Wallowa Lake with 3°C (37°F) to moderate in Brookings with 13°C (55°F).

Find more detailed climate information for Oregon in February here.

In March the weather in Oregon ranges from less favorable in Portland to mixed in The Dalles. The temperatures range from low in Wallowa Lake with 6°C (43°F) to moderate in Central Point with 15°C (59°F).

Find more detailed climate information for Oregon in March here.

In April the weather in Oregon ranges from less favorable in Seaside to very good in The Dalles. The temperatures range from low in Willamette National Forest with 10°C (50°F) to pleasant in Boardman with 19°C (66°F).

Find more detailed climate information for Oregon in April here.

In May the weather in Oregon ranges from mixed in Seaside to excellent in Portland. The temperatures range from moderate in Willamette National Forest with 14°C (57°F) to high in Boardman with 24°C (75°F).

Find more detailed climate information for Oregon in May here.

In June the weather in Oregon ranges from good in Depoe Bay to excellent in Portland. The temperatures range from moderate in Newport with 16°C (61°F) to high in Ontario with 28°C (82°F).

Find more detailed climate information for Oregon in June here.

In July the weather in Oregon is generally excellent. July is a summer month. The temperatures range from moderate in Newport with 17°C (63°F) to very high in Ontario with 35°C (95°F).

Find more detailed climate information for Oregon in July here.

In August the weather in Oregon is generally excellent. August is a summer month. The temperatures range from moderate in Newport with 18°C (64°F) to very high in Ontario with 33°C (91°F). On average, this month is one of the warmest months of the year in Oregon. So be prepared and make sure to dress lightly.

Find more detailed climate information for Oregon in August here.

In September the weather in Oregon ranges from very good in Depoe Bay to excellent in Portland. September is a summer month. The temperatures range from moderate in Newport with 18°C (64°F) to high in Central Point with 29°C (84°F).

Find more detailed climate information for Oregon in September here.

In October the weather in Oregon ranges from less favorable in Seaside to excellent in The Dalles. The temperatures range from moderate in Wallowa Lake with 13°C (55°F) to pleasant in Central Point with 21°C (70°F).

Find more detailed climate information for Oregon in October here.

In November the weather in Oregon is generally less favorable. The temperatures range from low in Wallowa Lake with 5°C (41°F) to moderate in Brookings with 14°C (57°F).

Find more detailed climate information for Oregon in November here.

In December the weather in Oregon is generally less favorable. December is a winter month. The temperatures range from very low in Wallowa Lake with 0°C (32°F) to low in Brookings with 12°C (54°F). On average, this month is the coldest month of the year in Oregon.

Find more detailed climate information for Oregon in December here.