2025 Compare Climate & Weather:
Olympia, WA vs Bettendorf, IA

Highlights

On average, there are 203 sunny days per year in Bettendorf. Olympia averages 136 sunny days per year. The US average is 205 sunny days.

Bettendorf, Iowa gets 37 inches of rain, on average, per year. Olympia, Washington gets 52.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Bettendorf averages 28 inches of snow per year. Olympia averages 6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Bettendorf, Iowa
Summer High: the July high is around 85.2 degrees
Winter Low: the January low is 15
Rain: averages 37 inches of rain a year
Snow: averages 28 inches of snow a year

Olympia, Washington
Summer High: the July high is around 77.1 degrees
Winter Low: the January low is 33.9
Rain: averages 52.7 inches of rain a year
Snow: averages 6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Bettendorf is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

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

Today's Weather - Olympia, WA

57°F

Today's Weather - Bettendorf, IA

69°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Olympia / Bettendorf

August is the hottest month for Olympia with an average high temperature of 78.0°, which ranks it as about average compared to other places in Washington. In Olympia, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Olympia are August, July and September.

July is the hottest month for Bettendorf with an average high temperature of 85.2°, which ranks it as warmer than most places in Iowa. In Bettendorf, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Bettendorf are September, June and August.

December has the coldest nighttime temperatures for Olympia with an average of 32.9°. This is about average compared to other places in Washington.

January has the coldest nighttime temperatures for Bettendorf with an average of 15.0°. This is one of the warmest places in Iowa.

In Olympia, there are 5.7 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

In Bettendorf, there are 17.2 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

In Olympia, there are 61.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

In Bettendorf, there are 120.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Iowa.

In Olympia, 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 Bettendorf, there are 9.2 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Iowa.

November is the wettest month in Olympia with 9.0 inches of rain, and the driest month is July with 0.8 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 52.7 inches in Olympia means that it is wetter than most places in Washington.


June is the wettest month in Bettendorf with 4.7 inches of rain, and the driest month is January with 1.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 37.0 inches in Bettendorf means that it is wetter than most places in Iowa.

November is the rainiest month in Olympia with 21.0 days of rain, and July is the driest month with only 4.8 rainy days. There are 167.2 rainy days annually in Olympia, which is rainier than most places in Washington. 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 Bettendorf with 11.7 days of rain, and February is the driest month with only 8.0 rainy days. There are 114.8 rainy days annually in Bettendorf, which is one of the rainiest places in Iowa. 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 6.0 inches in Olympia means that it is about average compared to other places in Washington.

An annual snowfall of 28.0 inches in Bettendorf means that it is less snowy than most places in Iowa.

February is the snowiest month in Olympia with 2.3 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Bettendorf with 8.4 inches of snow, and 6 months of the year have significant snowfall.