2024 Compare Climate & Weather:
Commerce City, CO vs Joliet, IL
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Highlights
On average, there are 186 sunny days per year in Joliet. Commerce City averages 243 sunny days per year. The US average is 205 sunny days.
Joliet, Illinois gets 39 inches of rain, on average, per year. Commerce City, Colorado gets 15.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
Joliet averages 27.7 inches of snow per year. Commerce City averages 44.3 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
Joliet, Illinois
Summer High: the July high is around 84.3 degrees
Winter Low: the January low is 16
Rain: averages 39 inches of rain a year
Snow: averages 27.7 inches of snow a year
Commerce City, Colorado
Summer High: the July high is around 89.7 degrees
Winter Low: the January low is 17
Rain: averages 15.7 inches of rain a year
Snow: averages 44.3 inches of snow a year
BESTPLACES COMFORT INDEX
JolietThe annual BestPlaces Comfort Index for Joliet is 6.9 (10=best), which means it is less comfortable than most places in Illinois.
6.9 / 10
June, September and August are the most pleasant months in Joliet, while January and December are the least comfortable months.
Commerce CityThe annual BestPlaces Comfort Index for Commerce City is 7.3 (10=best), which means it is more comfortable than most places in Colorado.
7.3 / 10
September, June and August are the most pleasant months in Commerce City, while December and January are the least comfortable months.
Today's Weather - Joliet, IL
4 PM PST
Chance Rain Showers then Mostly Cloudy
60°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Tonight | Chance Rain Showers then Mostly Cloudy | 52° / 70° | NE 10 to 15 mph |
| Wednesday Night | Mostly Clear | 49° / 75° | NE 5 to 10 mph |
| Thursday Night | Chance Showers And Thunderstorms | 59° / 77° | S 5 to 10 mph |
| Friday Night | Chance Showers And Thunderstorms | 58° / 80° | SE 5 to 10 mph |
| Saturday Night | Slight Chance Showers And Thunderstorms then Partly Cloudy | 60° / 83° | SSW 10 mph |
| Sunday Night | Slight Chance Showers And Thunderstorms | 60° / 79° | WSW 10 mph |
| Monday Night | Chance Showers And Thunderstorms | 59° / 79° | NNE 10 to 15 mph |
Average Monthly High / Low (°F)
| Month | Commerce City, CO | Joliet, IL |
|---|
| January | 46° / 17° | 31° / 16° |
| February | 47° / 19° | 36° / 20° |
| March | 55° / 27° | 48° / 29° |
| April | 63° / 34° | 61° / 39° |
| May | 72° / 44° | 71° / 49° |
| June | 83° / 53° | 81° / 60° |
| July | 90° / 59° | 84° / 64° |
| August | 87° / 58° | 82° / 63° |
| September | 79° / 48° | 76° / 54° |
| October | 66° / 36° | 64° / 43° |
| November | 53° / 25° | 49° / 33° |
| December | 44° / 16° | 35° / 20° |
Hot, Freezing, Rainy, Snowy Days: Commerce City / Joliet
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 30 / 28 | 4 / 11 | 4 / 6 |
| February | 0 / 0 | 27 / 25 | 5 / 9 | 4 / 5 |
| March | 0 / 0 | 24 / 21 | 6 / 11 | 5 / 3 |
| April | 0 / 0 | 12 / 6 | 8 / 12 | 3 / 0 |
| May | 1 / 1 | 1 / 0 | 9 / 12 | 0 / 0 |
| June | 7 / 3 | 0 / 0 | 8 / 11 | 0 / 0 |
| July | 17 / 5 | 0 / 0 | 8 / 10 | 0 / 0 |
| August | 11 / 3 | 0 / 0 | 8 / 10 | 0 / 0 |
| September | 4 / 1 | 1 / 0 | 6 / 8 | 0 / 0 |
| October | 0 / 0 | 10 / 3 | 5 / 10 | 1 / 0 |
| November | 0 / 0 | 24 / 14 | 5 / 10 | 4 / 1 |
| December | 0 / 0 | 30 / 26 | 5 / 12 | 4 / 7 |
July is the hottest month for Commerce City with an average high temperature of 89.7°, which ranks it as warmer than most places in Colorado. In Commerce City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Commerce City are September, June and May.
July is the hottest month for Joliet with an average high temperature of 84.3°, which ranks it as cooler than most places in Illinois. In Joliet, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Joliet are September, June and August.
December has the coldest nighttime temperatures for Commerce City with an average of 16.3°. This is warmer than most places in Colorado.
January has the coldest nighttime temperatures for Joliet with an average of 16.0°. This is about average compared to other places in Illinois.
In Commerce City, there are 39.7 days annually when the high temperature is over 90°, which is hotter than most places in Colorado.
In Joliet, there are 12.5 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.
In Commerce City, there are 157.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.
In Joliet, there are 123.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.
In Commerce City, there are 6.4 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.
In Joliet, there are 7.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.
May is the wettest month in Commerce City with 2.3 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Autumn with 37% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 15.7 inches in Commerce City means that it is drier than most places in Colorado.
July is the wettest month in Joliet with 4.6 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 33% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 39.0 inches in Joliet means that it is about average compared to other places in Illinois.
May is the rainiest month in Commerce City with 9.4 days of rain, and January is the driest month with only 4.3 rainy days. There are 76.6 rainy days annually in Commerce City, which is less rainy than most places in Colorado. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 18% chance of a rainy day.
May is the rainiest month in Joliet with 12.4 days of rain, and September is the driest month with only 7.8 rainy days. There are 124.6 rainy days annually in Joliet, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.
An annual snowfall of 44.3 inches in Commerce City means that it is less snowy than most places in Colorado.
An annual snowfall of 27.7 inches in Joliet means that it is snowier than most places in Illinois.
March is the snowiest month in Commerce City with 8.6 inches of snow, and 9 months of the year have significant snowfall.
December is the snowiest month in Joliet with 8.6 inches of snow, and 5 months of the year have significant snowfall.
DID YOU KNOW?
Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.
Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.
Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.
Reviews for Commerce City 
2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Commerce City
Reviews for Joliet 2 Reviews
Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More
Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More
Start Your Review of Joliet
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