2025 Compare Climate & Weather:
Wilmington, MA vs Portland, OR

Highlights

On average, there are 144 sunny days per year in Portland. Wilmington averages 200 sunny days per year. The US average is 205 sunny days.

Portland, Oregon gets 42.8 inches of rain, on average, per year. Wilmington, Massachusetts gets 48.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Portland averages 2.6 inches of snow per year. Wilmington averages 52.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Portland, Oregon
Summer High: the July high is around 80.5 degrees
Winter Low: the January low is 36.4
Rain: averages 42.8 inches of rain a year
Snow: averages 2.6 inches of snow a year

Wilmington, Massachusetts
Summer High: the July high is around 82.9 degrees
Winter Low: the January low is 17.7
Rain: averages 48.2 inches of rain a year
Snow: averages 52.9 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Portland is 7.5 (10=best), which means it is more comfortable than most places in Oregon.

The annual BestPlaces Comfort Index for Wilmington is 6.9 (10=best), which means it is about average compared to other places in Massachusetts.

Today's Weather - Wilmington, MA

70°F

Today's Weather - Portland, OR

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Wilmington / Portland

July is the hottest month for Wilmington with an average high temperature of 82.9°, which ranks it as warmer than most places in Massachusetts. In Wilmington, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Wilmington are June, August and September.

August is the hottest month for Portland with an average high temperature of 81.1°, which ranks it as cooler than most places in Oregon. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portland are September, July and August.

January has the coldest nighttime temperatures for Wilmington with an average of 17.7°. This is about average compared to other places in Massachusetts.

December has the coldest nighttime temperatures for Portland with an average of 35.6°. This is warmer than most places in Oregon.

In Wilmington, there are 9.8 days annually when the high temperature is over 90°, which is hotter than most places in Massachusetts.

In Portland, there are 11.6 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

In Wilmington, there are 125.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Massachusetts.

In Portland, there are 29.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In Wilmington, there are 3.1 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Massachusetts.

In Portland, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Oregon.

March is the wettest month in Wilmington with 4.7 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Summer with 27% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 48.2 inches in Wilmington means that it is about average compared to other places in Massachusetts.


December is the wettest month in Portland with 6.8 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Spring with 41% of yearly precipitation and 7% occurs in Autumn, which is the driest season. The annual rainfall of 42.8 inches in Portland means that it is about average compared to other places in Oregon.

May is the rainiest month in Wilmington with 13.0 days of rain, and September is the driest month with only 9.4 rainy days. There are 133.1 rainy days annually in Wilmington, which is one of the rainiest places in Massachusetts. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

November is the rainiest month in Portland with 19.3 days of rain, and August is the driest month with only 3.7 rainy days. There are 155.9 rainy days annually in Portland, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 11% chance of a rainy day.

An annual snowfall of 52.9 inches in Wilmington means that it is snowier than most places in Massachusetts.

An annual snowfall of 2.6 inches in Portland means that it is less snowy than most places in Oregon.

January is the snowiest month in Wilmington with 16.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Portland with 0.9 inches of snow, and 3 months of the year have significant snowfall.