2025 Compare Climate & Weather:
Vernonia, OR vs Rolla, MO

Highlights

On average, there are 193 sunny days per year in Rolla. Vernonia averages 138 sunny days per year. The US average is 205 sunny days.

Rolla, Missouri gets 46.4 inches of rain, on average, per year. Vernonia, Oregon gets 51.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rolla averages 12.8 inches of snow per year. Vernonia averages 7.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Rolla, Missouri
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 20.8
Rain: averages 46.4 inches of rain a year
Snow: averages 12.8 inches of snow a year

Vernonia, Oregon
Summer High: the July high is around 77.2 degrees
Winter Low: the January low is 31.8
Rain: averages 51.9 inches of rain a year
Snow: averages 7.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Rolla is 7.2 (10=best), which means it is more comfortable than most places in Missouri.

The annual BestPlaces Comfort Index for Vernonia is 7.0 (10=best), which means it is less comfortable than most places in Oregon.

Today's Weather - Vernonia, OR

43°F

Today's Weather - Rolla, MO

56°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Vernonia / Rolla

August is the hottest month for Vernonia with an average high temperature of 78.5°, which ranks it as cooler than most places in Oregon. In Vernonia, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Vernonia are August, July and September.

July is the hottest month for Rolla with an average high temperature of 88.1°, which ranks it as about average compared to other places in Missouri. In Rolla, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rolla are September, May and June.

December has the coldest nighttime temperatures for Vernonia with an average of 31.1°. This is colder than most places in Oregon.

January has the coldest nighttime temperatures for Rolla with an average of 20.8°. This is about average compared to other places in Missouri.

In Vernonia, there are 7.9 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

In Rolla, there are 29.9 days annually when the high temperature is over 90°, which is cooler than most places in Missouri.

In Vernonia, there are 76.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Oregon.

In Rolla, there are 102.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Vernonia, there are 0.1 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Oregon.

In Rolla, there are 2.6 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Missouri.

December is the wettest month in Vernonia with 8.3 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 51.9 inches in Vernonia means that it is wetter than most places in Oregon.


May is the wettest month in Rolla with 5.2 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 29% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 46.4 inches in Rolla means that it is wetter than most places in Missouri.

November is the rainiest month in Vernonia with 21.1 days of rain, and August is the driest month with only 4.4 rainy days. There are 171.8 rainy days annually in Vernonia, 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.

May is the rainiest month in Rolla with 12.6 days of rain, and September is the driest month with only 7.9 rainy days. There are 115.1 rainy days annually in Rolla, which is one of the rainiest places in Missouri. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 7.4 inches in Vernonia means that it is snowier than most places in Oregon.

An annual snowfall of 12.8 inches in Rolla means that it is about average compared to other places in Missouri.

February is the snowiest month in Vernonia with 2.5 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Rolla with 4.0 inches of snow, and 5 months of the year have significant snowfall.