2025 Compare Climate & Weather:
Hillsboro, OR vs Forest Grove, OR

Highlights

On average, there are 141 sunny days per year in Forest Grove. Hillsboro averages 142 sunny days per year. The US average is 205 sunny days.

Forest Grove, Oregon gets 42.3 inches of rain, on average, per year. Hillsboro, Oregon gets 39.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Forest Grove averages 3.5 inches of snow per year. Hillsboro averages 3.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Forest Grove, Oregon
Summer High: the July high is around 81.1 degrees
Winter Low: the January low is 34.3
Rain: averages 42.3 inches of rain a year
Snow: averages 3.5 inches of snow a year

Hillsboro, Oregon
Summer High: the July high is around 80.8 degrees
Winter Low: the January low is 36.7
Rain: averages 39.2 inches of rain a year
Snow: averages 3.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Forest Grove is 7.3 (10=best), which means it is more comfortable than most places in Oregon.

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

Today's Weather - Hillsboro, OR

45°F

Today's Weather - Forest Grove, OR

46°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Hillsboro / Forest Grove

August is the hottest month for Hillsboro with an average high temperature of 81.8°, which ranks it as cooler than most places in Oregon. In Hillsboro, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hillsboro are September, July and August.

August is the hottest month for Forest Grove with an average high temperature of 82.1°, which ranks it as about average compared to other places in Oregon. In Forest Grove, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Forest Grove are September, July and August.

December has the coldest nighttime temperatures for Hillsboro with an average of 35.7°. This is warmer than most places in Oregon.

December has the coldest nighttime temperatures for Forest Grove with an average of 33.6°. This is about average compared to other places in Oregon.

In Hillsboro, there are 13.1 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

In Forest Grove, there are 15.8 days annually when the high temperature is over 90°, which is about average compared to other places in Oregon.

In Hillsboro, there are 31.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In Forest Grove, there are 49.1 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Oregon.

In Hillsboro, 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 Forest Grove, 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 Hillsboro with 6.3 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Spring with 42% of yearly precipitation and 7% occurs in Autumn, which is the driest season. The annual rainfall of 39.2 inches in Hillsboro means that it is about average compared to other places in Oregon.


December is the wettest month in Forest Grove with 7.6 inches of rain, and the driest month is July with 0.4 inches. The wettest season is Spring with 45% of yearly precipitation and 6% occurs in Autumn, which is the driest season. The annual rainfall of 42.3 inches in Forest Grove means that it is about average compared to other places in Oregon.

November is the rainiest month in Hillsboro with 20.2 days of rain, and August is the driest month with only 3.4 rainy days. There are 156.2 rainy days annually in Hillsboro, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 35% of the time and the driest is Autumn with only a 10% chance of a rainy day.

November is the rainiest month in Forest Grove with 20.2 days of rain, and August is the driest month with only 3.3 rainy days. There are 156.4 rainy days annually in Forest Grove, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 36% of the time and the driest is Autumn with only a 10% chance of a rainy day.

An annual snowfall of 3.2 inches in Hillsboro means that it is about average compared to other places in Oregon.

An annual snowfall of 3.5 inches in Forest Grove means that it is about average compared to other places in Oregon.

December is the snowiest month in Hillsboro with 1.4 inches of snow, and 3 months of the year have significant snowfall.

December is the snowiest month in Forest Grove with 1.5 inches of snow, and 3 months of the year have significant snowfall.