2025 Compare Climate & Weather:
Ontario, OR vs Oregon City, OR

Highlights

On average, there are 143 sunny days per year in Oregon City. Ontario averages 207 sunny days per year. The US average is 205 sunny days.

Oregon City, Oregon gets 42.9 inches of rain, on average, per year. Ontario, Oregon gets 10.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Oregon City averages 1.6 inches of snow per year. Ontario averages 13.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Oregon City, Oregon
Summer High: the July high is around 81.8 degrees
Winter Low: the January low is 36.1
Rain: averages 42.9 inches of rain a year
Snow: averages 1.6 inches of snow a year

Ontario, Oregon
Summer High: the July high is around 91.9 degrees
Winter Low: the January low is 20.3
Rain: averages 10.6 inches of rain a year
Snow: averages 13.2 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Ontario is 7.2 (10=best), which means it is about average compared to other places in Oregon.

Today's Weather - Ontario, OR

57°F

Today's Weather - Oregon City, OR

50°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Ontario / Oregon City

July is the hottest month for Ontario with an average high temperature of 91.9°, which ranks it as one of the hottest places in Oregon. In Ontario, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ontario are September, June and May.

August is the hottest month for Oregon City with an average high temperature of 82.4°, which ranks it as about average compared to other places in Oregon. In Oregon City, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oregon City are September, June and July.

January has the coldest nighttime temperatures for Ontario with an average of 20.3°. This is one of the coldest places in Oregon.

December has the coldest nighttime temperatures for Oregon City with an average of 34.8°. This is warmer than most places in Oregon.

In Ontario, there are 50.9 days annually when the high temperature is over 90°, which is one of the hottest places in Oregon.

In Oregon City, there are 15.3 days annually when the high temperature is over 90°, which is about average compared to other places in Oregon.

In Ontario, there are 137.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Oregon City, there are 33.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In Ontario, there are 4.0 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Oregon.

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

December is the wettest month in Ontario with 1.7 inches of rain, and the driest month is August with 0.2 inches. The wettest season is Spring with 37% of yearly precipitation and 12% occurs in Autumn, which is the driest season. The annual rainfall of 10.6 inches in Ontario means that it is one of the driest places in Oregon.


December is the wettest month in Oregon City with 6.9 inches of rain, and the driest month is July with 0.6 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 42.9 inches in Oregon City means that it is about average compared to other places in Oregon.

December is the rainiest month in Ontario with 10.3 days of rain, and July is the driest month with only 2.3 rainy days. There are 78.5 rainy days annually in Ontario, which is one of the least rainy places in Oregon. The rainiest season is Spring when it rains 35% of the time and the driest is Autumn with only a 12% chance of a rainy day.

November is the rainiest month in Oregon City with 18.7 days of rain, and August is the driest month with only 3.4 rainy days. There are 146.6 rainy days annually in Oregon City, which is about average compared to other 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 13.2 inches in Ontario means that it is snowier than most places in Oregon.

An annual snowfall of 1.6 inches in Oregon City means that it is less snowy than most places in Oregon.

December is the snowiest month in Ontario with 6.5 inches of snow, and 4 months of the year have significant snowfall.

December is the snowiest month in Oregon City with 0.5 inches of snow, and 3 months of the year have significant snowfall.