2025 Compare Climate & Weather:
St. Charles, IL vs Dallas, TX

Highlights

On average, there are 234 sunny days per year in Dallas. St. Charles averages 189 sunny days per year. The US average is 205 sunny days.

Dallas, Texas gets 39.1 inches of rain, on average, per year. St. Charles, Illinois gets 37.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Dallas averages 1.2 inches of snow per year. St. Charles averages 30.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Dallas, Texas
Summer High: the July high is around 94.9 degrees
Winter Low: the January low is 35.5
Rain: averages 39.1 inches of rain a year
Snow: averages 1.2 inches of snow a year

St. Charles, Illinois
Summer High: the July high is around 84.5 degrees
Winter Low: the January low is 14.7
Rain: averages 37.7 inches of rain a year
Snow: averages 30.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for St. Charles is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

Today's Weather - St. Charles, IL

43°F

Today's Weather - Dallas, TX

63°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: St. Charles / Dallas

July is the hottest month for St. Charles with an average high temperature of 84.5°, which ranks it as cooler than most places in Illinois. In St. Charles, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for St. Charles are September, June and August.

August is the hottest month for Dallas with an average high temperature of 95.7°, which ranks it as warmer than most places in Texas. In Dallas, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Dallas are October, April and May.

January has the coldest nighttime temperatures for St. Charles with an average of 14.7°. This is colder than most places in Illinois.

January has the coldest nighttime temperatures for Dallas with an average of 35.5°. This is about average compared to other places in Texas.

In St. Charles, there are 13.8 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Dallas, there are 91.2 days annually when the high temperature is over 90°, which is about average compared to other places in Texas.

In St. Charles, there are 131.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Dallas, there are 30.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Texas.

In St. Charles, there are 8.8 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

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

August is the wettest month in St. Charles with 4.7 inches of rain, and the driest month is January with 1.6 inches. The wettest season is Autumn with 34% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 37.7 inches in St. Charles means that it is drier than most places in Illinois.


May is the wettest month in Dallas with 5.0 inches of rain, and the driest month is August with 2.2 inches. The wettest season is Summer with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 39.1 inches in Dallas means that it is wetter than most places in Texas.

May is the rainiest month in St. Charles with 12.2 days of rain, and February is the driest month with only 7.7 rainy days. There are 119.6 rainy days annually in St. Charles, which is rainier than most places in Illinois. 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.

May is the rainiest month in Dallas with 8.9 days of rain, and August is the driest month with only 4.5 rainy days. There are 77.6 rainy days annually in Dallas, which is rainier than most places in Texas. The rainiest season is Summer when it rains 29% of the time and the driest is Autumn with only a 21% chance of a rainy day.

An annual snowfall of 30.1 inches in St. Charles means that it is snowier than most places in Illinois.

An annual snowfall of 1.2 inches in Dallas means that it is snowier than most places in Texas.

January is the snowiest month in St. Charles with 9.6 inches of snow, and 6 months of the year have significant snowfall.

February is the snowiest month in Dallas with 0.4 inches of snow, and no months of the year have significant snowfall.