2025 Compare Climate & Weather:
Ontario, CA vs Durham, NC

Highlights

On average, there are 220 sunny days per year in Durham. Ontario averages 279 sunny days per year. The US average is 205 sunny days.

Durham, North Carolina gets 45.7 inches of rain, on average, per year. Ontario, California gets 15.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Durham averages 3.7 inches of snow per year. Ontario averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Durham, North Carolina
Summer High: the July high is around 89 degrees
Winter Low: the January low is 29.6
Rain: averages 45.7 inches of rain a year
Snow: averages 3.7 inches of snow a year

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

BestPlaces Comfort Index

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

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

Today's Weather - Ontario, CA

63°F

Today's Weather - Durham, NC

72°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Ontario / Durham

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.

July is the hottest month for Durham with an average high temperature of 89.0°, which ranks it as about average compared to other places in North Carolina. In Durham, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Durham are May, September and April.

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

January has the coldest nighttime temperatures for Durham with an average of 29.6°. This is about average compared to other places in North Carolina.

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

In Durham, there are 38.2 days annually when the high temperature is over 90°, which is about average compared to other places in North Carolina.

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 Durham, there are 70.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in North Carolina.

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.

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

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.


August is the wettest month in Durham with 4.6 inches of rain, and the driest month is April with 3.2 inches. The wettest season is Autumn with 28% of yearly precipitation and 23% occurs in Spring, which is the driest season. The annual rainfall of 45.7 inches in Durham means that it is drier than most places in North Carolina.

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.

July is the rainiest month in Durham with 10.6 days of rain, and October is the driest month with only 7.2 rainy days. There are 109.3 rainy days annually in Durham, which is about average compared to other places in North Carolina. The rainiest season is Autumn when it rains 27% of the time and the driest is Winter with only a 21% chance of a rainy day.

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

An annual snowfall of 3.7 inches in Durham means that it is snowier than most places in North Carolina.

Any measurable snowfall is a rare occurance in Ontario.

January is the snowiest month in Durham with 1.9 inches of snow, and 2 months of the year have significant snowfall.