2025 Compare Climate & Weather:
Issaquah, WA vs Columbia, MD

Highlights

On average, there are 212 sunny days per year in Columbia. Issaquah averages 154 sunny days per year. The US average is 205 sunny days.

Columbia, Maryland gets 45 inches of rain, on average, per year. Issaquah, Washington gets 52.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Columbia averages 17.3 inches of snow per year. Issaquah averages 6.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Columbia, Maryland
Summer High: the July high is around 87.9 degrees
Winter Low: the January low is 23.9
Rain: averages 45 inches of rain a year
Snow: averages 17.3 inches of snow a year

Issaquah, Washington
Summer High: the July high is around 75.6 degrees
Winter Low: the January low is 35.3
Rain: averages 52.6 inches of rain a year
Snow: averages 6.2 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Issaquah is 7.1 (10=best), which means it is about average compared to other places in Washington.

Today's Weather - Issaquah, WA

65°F

Today's Weather - Columbia, MD

73°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Issaquah / Columbia

August is the hottest month for Issaquah with an average high temperature of 76.1°, which ranks it as cooler than most places in Washington. In Issaquah, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Issaquah are August, July and September.

July is the hottest month for Columbia with an average high temperature of 87.9°, which ranks it as warmer than most places in Maryland. In Columbia, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Columbia are September, May and June.

December has the coldest nighttime temperatures for Issaquah with an average of 33.9°. This is warmer than most places in Washington.

January has the coldest nighttime temperatures for Columbia with an average of 23.9°. This is colder than most places in Maryland.

In Issaquah, there are 3.1 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

In Columbia, there are 29.1 days annually when the high temperature is over 90°, which is hotter than most places in Maryland.

In Issaquah, there are 43.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

In Columbia, there are 99.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Maryland.

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

In Columbia, there are 0.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Maryland.

November is the wettest month in Issaquah with 8.6 inches of rain, and the driest month is July with 1.2 inches. The wettest season is Spring with 36% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 52.6 inches in Issaquah means that it is wetter than most places in Washington.


May is the wettest month in Columbia with 4.4 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Summer with 27% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 45.0 inches in Columbia means that it is wetter than most places in Maryland.

November is the rainiest month in Issaquah with 20.4 days of rain, and August is the driest month with only 5.7 rainy days. There are 173.4 rainy days annually in Issaquah, which is rainier than most places in Washington. The rainiest season is Spring when it rains 31% of the time and the driest is Autumn with only a 14% chance of a rainy day.

May is the rainiest month in Columbia with 11.6 days of rain, and October is the driest month with only 8.3 rainy days. There are 113.9 rainy days annually in Columbia, which is about average compared to other places in Maryland. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 6.2 inches in Issaquah means that it is about average compared to other places in Washington.

An annual snowfall of 17.3 inches in Columbia means that it is snowier than most places in Maryland.

December is the snowiest month in Issaquah with 1.9 inches of snow, and 5 months of the year have significant snowfall.

February is the snowiest month in Columbia with 6.2 inches of snow, and 5 months of the year have significant snowfall.