The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Castle Rock, CO vs New Lenox, IL

2025 Compare Climate & Weather:
Castle Rock, CO vs New Lenox, IL

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Highlights

On average, there are 187 sunny days per year in New Lenox. Castle Rock averages 243 sunny days per year. The US average is 205 sunny days.

New Lenox, Illinois gets 37.9 inches of rain, on average, per year. Castle Rock, Colorado gets 18.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

New Lenox averages 29.9 inches of snow per year. Castle Rock averages 78.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

New Lenox, Illinois
Summer High: the July high is around 84.1 degrees
Winter Low: the January low is 16
Rain: averages 37.9 inches of rain a year
Snow: averages 29.9 inches of snow a year

Castle Rock, Colorado
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 18.6
Rain: averages 18.6 inches of rain a year
Snow: averages 78.3 inches of snow a year

BestPlaces Comfort Index
New Lenox

The annual BestPlaces Comfort Index for New Lenox 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 New Lenox, while January and December are the least comfortable months.

Castle Rock

The annual BestPlaces Comfort Index for Castle Rock is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

7.2 / 10
August, September and July are the most pleasant months in Castle Rock, while December and January are the least comfortable months.

Average Monthly High / Low (°F)
MonthCastle Rock, CONew Lenox, IL
January45° / 19°31° / 16°
February46° / 20°36° / 20°
March53° / 26°47° / 29°
April60° / 32°60° / 40°
May69° / 41°71° / 50°
June79° / 50°81° / 60°
July86° / 56°84° / 64°
August83° / 55°82° / 63°
September76° / 47°76° / 55°
October65° / 36°63° / 43°
November52° / 26°49° / 33°
December44° / 18°35° / 20°
Hot, Freezing, Rainy, Snowy Days: Castle Rock / New Lenox
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 029 / 283 / 104 / 6
February0 / 025 / 254 / 94 / 5
March0 / 023 / 206 / 115 / 3
April0 / 015 / 66 / 124 / 0
May0 / 13 / 09 / 121 / 0
June2 / 30 / 08 / 100 / 0
July8 / 50 / 08 / 100 / 0
August4 / 30 / 010 / 90 / 0
September1 / 11 / 06 / 80 / 0
October0 / 010 / 34 / 101 / 0
November0 / 022 / 144 / 114 / 1
December0 / 028 / 264 / 114 / 6
July is the hottest month for Castle Rock with an average high temperature of 85.5°, which ranks it as about average compared to other places in Colorado. In Castle Rock, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castle Rock are June, September and August.

July is the hottest month for New Lenox with an average high temperature of 84.1°, which ranks it as cooler than most places in Illinois. In New Lenox, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for New Lenox are September, June and August.
December has the coldest nighttime temperatures for Castle Rock with an average of 18.1°. This is one of the warmest places in Colorado.

January has the coldest nighttime temperatures for New Lenox with an average of 16.0°. This is about average compared to other places in Illinois.

In Castle Rock, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

In New Lenox, there are 12.3 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Castle Rock, there are 156.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In New Lenox, there are 121.9 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

In Castle Rock, there are 5.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

In New Lenox, there are 7.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

August is the wettest month in Castle Rock with 2.6 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 40% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 18.6 inches in Castle Rock means that it is wetter than most places in Colorado.


July is the wettest month in New Lenox with 4.6 inches of rain, and the driest month is February with 1.7 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 37.9 inches in New Lenox means that it is drier than most places in Illinois.

August is the rainiest month in Castle Rock with 9.9 days of rain, and January is the driest month with only 3.3 rainy days. There are 70.0 rainy days annually in Castle Rock, which is less rainy than most places in Colorado. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 15% chance of a rainy day.

May is the rainiest month in New Lenox with 12.0 days of rain, and September is the driest month with only 8.2 rainy days. There are 122.4 rainy days annually in New Lenox, 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 23% chance of a rainy day.

An annual snowfall of 78.3 inches in Castle Rock means that it is snowier than most places in Colorado.

An annual snowfall of 29.9 inches in New Lenox means that it is snowier than most places in Illinois.
March is the snowiest month in Castle Rock with 16.8 inches of snow, and 9 months of the year have significant snowfall.

January is the snowiest month in New Lenox with 9.9 inches of snow, and 6 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 Castle Rock    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

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

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

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

   |    Reply

Start Your Review of Castle Rock

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Reviews for New Lenox    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

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

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

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

   |    Reply

Start Your Review of New Lenox

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Zips In Castle Rock, Colorado
80104, 80109
Zips In NEW LENOX, ILLINOIS
No Zip Codes Here.
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