Portland, OR Weather by Month and Climate Averages

How much rain does Portland get?

Portland gets 44.1 in of precipitation in an average year, spread over about 152 days with measurable rain. That is more rainy days than 94% of the US.

December is the wettest month, with 7.3 in. July is the driest, with 0.4 in. December has the most rainy days, about 19.

The longest dry spell in the last five years lasted 66 days, to September 11, 2022.

See where Portland ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Oregon.

Does it snow in Portland?

Yes. Portland gets about 3.6 in of snow in an average season, measured at the reporting station.

The snowiest winter on record is 2008–09, with 23.9 in.

The most recent measurable snow at the station fell on February 14, 2025.

See where Portland ranks: snowiest cities in the US.

Portland weather by month

Portland weather in January

In January, Portland averages a high of 47°F and a low of 38°F. It gets 6.4 in of precipitation over about 18 rainy days. The sun is out about 16% of daylight hours. The January record high is 65°F (2005) and the record low is 12°F (1979).

Portland weather in February

In February, Portland averages a high of 51°F and a low of 39°F. It gets 4.7 in of precipitation over about 15 rainy days. The sun is out about 26% of daylight hours. The February record high is 71°F (1988) and the record low is 8°F (1989).

Portland weather in March

In March, Portland averages a high of 56°F and a low of 41°F. It gets 4.8 in of precipitation over about 18 rainy days. The sun is out about 30% of daylight hours. The March record high is 82°F (2025) and the record low is 24°F (1989).

Portland weather in April

In April, Portland averages a high of 61°F and a low of 44°F. It gets 3.6 in of precipitation over about 16 rainy days. The sun is out about 36% of daylight hours. The April record high is 90°F (2016) and the record low is 31°F (2008).

Portland weather in May

In May, Portland averages a high of 68°F and a low of 49°F. It gets 2.6 in of precipitation over about 12 rainy days. The sun is out about 37% of daylight hours. The May record high is 103°F (1983) and the record low is 36°F (1978). May is one of the most comfortable months to visit.

Portland weather in June

In June, Portland averages a high of 73°F and a low of 53°F. It gets 1.5 in of precipitation over about 9 rainy days. The sun is out about 50% of daylight hours. The June record high is 114°F (2021) and the record low is 40°F (2018). June is one of the most comfortable months to visit.

Portland weather in July

In July, Portland averages a high of 80°F and a low of 58°F. It gets 0.4 in of precipitation over about 3 rainy days. The sun is out about 73% of daylight hours. The July record high is 105°F (2009) and the record low is 45°F (1988).

Portland weather in August

In August, Portland averages a high of 81°F and a low of 58°F. It gets 0.5 in of precipitation over about 3 rainy days. The sun is out about 65% of daylight hours. The August record high is 106°F (1981) and the record low is 46°F (1973).

Portland weather in September

In September, Portland averages a high of 75°F and a low of 55°F. It gets 1.6 in of precipitation over about 7 rainy days. The sun is out about 54% of daylight hours. The September record high is 103°F (1988) and the record low is 41°F (1982). September is one of the most comfortable months to visit.

Portland weather in October

In October, Portland averages a high of 63°F and a low of 48°F. It gets 4.0 in of precipitation over about 13 rainy days. The sun is out about 44% of daylight hours. The October record high is 92°F (1987) and the record low is 31°F (1991). October is one of the most comfortable months to visit.

Portland weather in November

In November, Portland averages a high of 52°F and a low of 42°F. It gets 6.6 in of precipitation over about 18 rainy days. The sun is out about 27% of daylight hours. The November record high is 71°F (1975) and the record low is 19°F (2010).

Portland weather in December

In December, Portland averages a high of 46°F and a low of 37°F. It gets 7.3 in of precipitation over about 19 rainy days. The sun is out about 21% of daylight hours. The December record high is 67°F (1993) and the record low is 10°F (1983).

Sunshine, humidity and wind in Portland

July is the sunniest month in Portland, with sunshine about 73% of daylight hours. January is the cloudiest, at 16%. Over the year the sun shines about 40% of daylight hours. Portland is cloudier than 88% of the US.

Humidity peaks in December at 85% and is lowest in July at 53%.

Portland has about 12 days a year above 90°F. Portland is cooler than 74% of the US.

See where Portland ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

First and last freeze in Portland

The first fall freeze in Portland typically comes around November 28, and the last spring freeze around March 2. That leaves a frost-free growing season of about 271 days.

Portland weather records

The hottest temperature on record at the Portland station is 114°F, on June 28, 2021. The coldest is 8°F, on February 3, 1989.

The wettest day on record brought 3.2 in of rain, on October 27, 1994.

35 all-time records have been set at the station since 1973.

The annual mean temperature has changed by +0.2°F per decade since 1974.

The best time to visit Portland

The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 70°F.

Winter (December–February) is chilly, with average highs around 48°F and lows near 38°F. Snow is possible.

Spring (March–May) is mild, with average highs around 62°F and lows near 45°F.

Summer (June–August) is warm, with average highs around 78°F and lows near 57°F.

Autumn (September–November) is mild, with average highs around 63°F and lows near 48°F.

Portland climate questions

How much rain does Portland get?

Portland gets 44.1 in of precipitation in an average year, over about 152 rainy days.

What is the wettest month in Portland?

December is the wettest month in Portland, with 7.3 in. July is the driest, with 0.4 in.

How many rainy days does Portland have a year?

Portland has about 152 days with measurable rain in an average year. December has the most, about 19.

Does it snow in Portland?

Yes. Portland gets about 3.6 in of snow in an average season. The snowiest winter on record is 2008–09, with 23.9 in.

What is the hottest month in Portland?

August is the warmest month in Portland, with an average high of 81°F.

What is the coldest month in Portland?

December is the coldest month in Portland, with an average low of 37°F.

What is the record high temperature in Portland?

The record high at the Portland station is 114°F, set on June 28, 2021. The record low is 8°F, on February 3, 1989.

What is the sunniest month in Portland?

July is the sunniest month in Portland, with sunshine about 73% of daylight hours. January is the cloudiest.

When is the first frost in Portland?

The first fall freeze in Portland typically comes around November 28. The last spring freeze is around March 2.

What is the best time to visit Portland?

The most comfortable time to visit is typically May to June and September to October, when daytime highs sit near 70°F.