2025 Compare Climate & Weather:
Portland, OR vs Wilmette, IL

Highlights

On average, there are 190 sunny days per year in Wilmette. Portland averages 144 sunny days per year. The US average is 205 sunny days.

Wilmette, Illinois gets 36.4 inches of rain, on average, per year. Portland, Oregon gets 42.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Wilmette averages 35.9 inches of snow per year. Portland averages 2.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Wilmette, Illinois
Summer High: the July high is around 83.1 degrees
Winter Low: the January low is 16.7
Rain: averages 36.4 inches of rain a year
Snow: averages 35.9 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Wilmette is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

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

Today's Weather - Portland, OR

52°F

Today's Weather - Wilmette, IL

50°F

Average Monthly High / Low (°F)

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

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.

July is the hottest month for Wilmette with an average high temperature of 83.1°, which ranks it as one of the coolest places in Illinois. In Wilmette, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Wilmette are June, September and August.

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

January has the coldest nighttime temperatures for Wilmette with an average of 16.7°. This is about average compared to other places in Illinois.

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

In Wilmette, there are 13.9 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

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 Wilmette, there are 122.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

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.

In Wilmette, there are 6.2 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

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.


August is the wettest month in Wilmette with 4.3 inches of rain, and the driest month is February with 1.6 inches. The wettest season is Autumn with 32% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.4 inches in Wilmette means that it is one of the driest places in Illinois.

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.

April is the rainiest month in Wilmette with 12.2 days of rain, and February is the driest month with only 8.2 rainy days. There are 125.3 rainy days annually in Wilmette, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.

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

An annual snowfall of 35.9 inches in Wilmette means that it is one of the snowiest places in Illinois.

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

January is the snowiest month in Wilmette with 11.3 inches of snow, and 6 months of the year have significant snowfall.