2025 Compare Climate & Weather:
Moses Lake, WA vs Ontario, CA

Highlights

On average, there are 279 sunny days per year in Ontario. Moses Lake averages 194 sunny days per year. The US average is 205 sunny days.

Ontario, California gets 15.7 inches of rain, on average, per year. Moses Lake, Washington gets 8.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Ontario averages 0 inches of snow per year. Moses Lake averages 20.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Ontario, California
Summer High: the July high is around 91.9 degrees
Winter Low: the January low is 42.6
Rain: averages 15.7 inches of rain a year
Snow: averages 0 inches of snow a year

Moses Lake, Washington
Summer High: the July high is around 87.2 degrees
Winter Low: the January low is 23.9
Rain: averages 8.5 inches of rain a year
Snow: averages 20.8 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Ontario is 8.8 (10=best), which means it is more comfortable than most places in California.

The annual BestPlaces Comfort Index for Moses Lake is 7.4 (10=best), which means it is one of the most pleasant places in Washington.

Today's Weather - Moses Lake, WA

58°F

Today's Weather - Ontario, CA

59°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Moses Lake / Ontario

July is the hottest month for Moses Lake with an average high temperature of 87.2°, which ranks it as warmer than most places in Washington. In Moses Lake, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Moses Lake are June, September and May.

August is the hottest month for Ontario with an average high temperature of 93.4°, which ranks it as warmer than most places in California. In Ontario, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ontario are May, October and April.

December has the coldest nighttime temperatures for Moses Lake with an average of 22.6°. This is colder than most places in Washington.

December has the coldest nighttime temperatures for Ontario with an average of 41.4°. This is warmer than most places in California.

In Moses Lake, there are 28.6 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Ontario, there are 79.5 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Moses Lake, there are 123.2 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Washington.

In Ontario, there are 3.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Moses Lake, there are 1.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Washington.

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

December is the wettest month in Moses Lake with 1.3 inches of rain, and the driest month is August with 0.2 inches. The wettest season is Spring with 37% of yearly precipitation and 14% occurs in Autumn, which is the driest season. The annual rainfall of 8.5 inches in Moses Lake means that it is one of the driest places in Washington.


February is the wettest month in Ontario with 3.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 60% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 15.7 inches in Ontario means that it is drier than most places in California.

December is the rainiest month in Moses Lake with 7.9 days of rain, and August is the driest month with only 1.8 rainy days. There are 57.8 rainy days annually in Moses Lake, which is one of the least rainy places in Washington. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 14% chance of a rainy day.

February is the rainiest month in Ontario with 5.7 days of rain, and July is the driest month with only 0.2 rainy days. There are 30.5 rainy days annually in Ontario, which is one of the least rainy places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 4% chance of a rainy day.

An annual snowfall of 20.8 inches in Moses Lake means that it is snowier than most places in Washington.

There is rarely any recorded snowfall in Ontario, ranking it as one of the least snowy places in California.

December is the snowiest month in Moses Lake with 8.2 inches of snow, and 5 months of the year have significant snowfall.

Any measurable snowfall is a rare occurance in Ontario.