2025 Compare Climate & Weather:
Oak Forest, IL vs Boulder, CO

Change Cities
Highlights

On average, there are 245 sunny days per year in Boulder. Oak Forest averages 188 sunny days per year. The US average is 205 sunny days.

Boulder, Colorado gets 18.1 inches of rain, on average, per year. Oak Forest, Illinois gets 39.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Boulder averages 71.1 inches of snow per year. Oak Forest averages 31.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Boulder, Colorado
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 18.9
Rain: averages 18.1 inches of rain a year
Snow: averages 71.1 inches of snow a year

Oak Forest, Illinois
Summer High: the July high is around 84.1 degrees
Winter Low: the January low is 18.1
Rain: averages 39.1 inches of rain a year
Snow: averages 31.3 inches of snow a year

BestPlaces Comfort Index
Boulder

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

7.1 / 10
September, June and August are the most pleasant months in Boulder, while December and January are the least comfortable months.

Oak Forest

The annual BestPlaces Comfort Index for Oak Forest is 7.0 (10=best), which means it is about average compared to other places in Illinois.

7 / 10
September, June and August are the most pleasant months in Oak Forest, while January and December are the least comfortable months.

Today's Weather - Oak Forest, IL

8 PM PST

Mostly Cloudy

49°F

DAYDESCRIPTIONHIGH / LOWWIND
TonightMostly Cloudy49° / 59°NNE 10 to 15 mph
Thursday NightMostly Clear40° / 63°NE 5 to 15 mph
Friday NightMostly Clear43° / 75°ESE 0 to 5 mph
Saturday NightMostly Clear49° / 76°NE 5 to 10 mph
Sunday NightPartly Cloudy57° / 77°ESE 5 to 10 mph
Monday NightSlight Chance Showers And Thunderstorms61° / 77°SE 5 to 10 mph
Tuesday NightChance Showers And Thunderstorms then Partly Cloudy61° / 81°SE 5 to 10 mph
Today's Weather - Boulder, CO

8 PM PST

Chance Showers And Thunderstorms then Mostly Cloudy

46°F

DAYDESCRIPTIONHIGH / LOWWIND
TonightChance Showers And Thunderstorms then Mostly Cloudy40° / 68°W 5 mph
Thursday NightMostly Clear45° / 73°SW 5 mph
Friday NightPartly Cloudy46° / 76°NW 5 mph
Saturday NightMostly Clear49° / 82°SSW 5 mph
Sunday NightMostly Cloudy54° / 84°WSW 6 mph
Monday NightPartly Cloudy53° / 84°SW 8 mph
Tuesday NightSlight Chance Rain Showers then Partly Cloudy51° / 74°WSW 6 to 10 mph
Average Monthly High / Low (°F)
MonthOak Forest, ILBoulder, CO
January32° / 18°47° / 19°
February36° / 22°48° / 20°
March47° / 31°55° / 27°
April59° / 41°62° / 34°
May70° / 51°72° / 43°
June80° / 61°82° / 51°
July84° / 67°88° / 57°
August82° / 65°86° / 55°
September76° / 57°78° / 46°
October63° / 45°66° / 36°
November49° / 35°54° / 26°
December36° / 23°45° / 18°
Hot, Freezing, Rainy, Snowy Days: Oak Forest / Boulder
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 027 / 2810 / 57 / 5
February0 / 023 / 258 / 55 / 5
March0 / 017 / 2311 / 73 / 6
April0 / 04 / 1311 / 91 / 4
May1 / 10 / 212 / 110 / 1
June3 / 60 / 011 / 90 / 0
July6 / 140 / 010 / 90 / 0
August4 / 90 / 010 / 100 / 0
September1 / 30 / 19 / 70 / 0
October0 / 02 / 1010 / 60 / 2
November0 / 012 / 2211 / 51 / 4
December0 / 024 / 2811 / 55 / 5
July is the hottest month for Oak Forest with an average high temperature of 84.1°, which ranks it as cooler than most places in Illinois. In Oak Forest, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Oak Forest are June, September and August.

July is the hottest month for Boulder with an average high temperature of 88.1°, which ranks it as about average compared to other places in Colorado. In Boulder, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder are September, June and May.
January has the coldest nighttime temperatures for Oak Forest with an average of 18.1°. This is warmer than most places in Illinois.

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

In Oak Forest, there are 15.2 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.

In Oak Forest, there are 108.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In Oak Forest, there are 5.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

In Boulder, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

August is the wettest month in Oak Forest with 4.4 inches of rain, and the driest month is February with 1.8 inches. The wettest season is Autumn with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 39.1 inches in Oak Forest means that it is about average compared to other places in Illinois.


May is the wettest month in Boulder with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Boulder means that it is wetter than most places in Colorado.

May is the rainiest month in Oak Forest with 12.0 days of rain, and February is the driest month with only 8.4 rainy days. There are 123.1 rainy days annually in Oak Forest, 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 24% chance of a rainy day.

May is the rainiest month in Boulder with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 88.0 rainy days annually in Boulder, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 31.3 inches in Oak Forest means that it is snowier than most places in Illinois.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.
January is the snowiest month in Oak Forest with 10.0 inches of snow, and 6 months of the year have significant snowfall.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 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 Oak Forest    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 Oak Forest

See all reviews
Reviews for Boulder    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 Boulder

See all reviews
Most Recent Searches On Compare Climate & Weather
Compare CityCompared To This City
 San Jose, CaliforniaBoston, MassachusettsCompare
 Wasilla, AlaskaMinneapolis, MinnesotaCompare
 Phoenix, ArizonaPhoenix, OregonCompare
 Sioux Falls, South DakotaDuluth, MinnesotaCompare
 Aurora, ColoradoPrescott Valley, ArizonaCompare
 Huntsville, AlabamaMarquette, MichiganCompare
 San Jose, CaliforniaBoston, MassachusettsCompare
 San Jose, CaliforniaBoston, MassachusettsCompare
 Wausau, WisconsinStevens Point, WisconsinCompare
 San Jose, CaliforniaBoston, MassachusettsCompare
Compare Cost of Living
Compare Oak Forest Cost of Living vs Boulder Cost of Living: Taxes, Childcare, Groceries, Health...


Zips In Oak Forest, Illinois
No Zip Codes Here.
Zips In BOULDER, COLORADO
80302, 80304, 80301, 80303, 80305, 80310
Learn More About OAK FOREST, ILLINOIS
Overview
Cost of Living
Job Market
Crime
Climate
Economy
Religion
Voting
Learn More About Boulder, Colorado
Overview
Cost of Living
Job Market
Crime
Climate
Economy
Religion
Voting
Premium Subscription
Includes Cost of Living compares for child care, utilities, transportation, health, taxes, housing for home owners vs renters, weather, insurance premiums and so much more.


The premier source for comprehensive city data for over 30 years.

Privacy Policy  •  Terms of Use  •  Returns & Refunds
© Best Places. All rights reserved.