2025 Compare Climate & Weather:
Boulder, CO vs Louisville, KY

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Highlights

On average, there are 195 sunny days per year in Louisville. Boulder averages 245 sunny days per year. The US average is 205 sunny days.

Louisville, Kentucky gets 46.2 inches of rain, on average, per year. Boulder, Colorado gets 18.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Louisville averages 8.7 inches of snow per year. Boulder averages 71.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Louisville, Kentucky
Summer High: the July high is around 87.6 degrees
Winter Low: the January low is 25.5
Rain: averages 46.2 inches of rain a year
Snow: averages 8.7 inches of snow a year

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

BestPlaces Comfort Index
Louisville

The annual BestPlaces Comfort Index for Louisville-Jefferson County is 7.3 (10=best), which means it is one of the most pleasant places in Kentucky.

7.3 / 10
September, May and October are the most pleasant months in Louisville-Jefferson County, while January and December are the least comfortable months.

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.

Today's Weather - Boulder, CO

9 AM PST

Sunny

60°F

DAYDESCRIPTIONHIGH / LOWWIND
TodaySunny75° / 46°ESE 3 to 9 mph
SundayMostly Sunny then Slight Chance Showers And Thunderstorms75° / 45°NE 2 to 13 mph
MondayShowers And Thunderstorms62° / 43°ENE 1 to 8 mph
TuesdayRain Showers50° / 39°NNE 2 to 8 mph
WednesdayShowers And Thunderstorms Likely58° / 41°NE 1 to 5 mph
ThursdayMostly Sunny then Chance Showers And Thunderstorms68° / 45°N 3 mph
FridayMostly Sunny then Chance Showers And Thunderstorms72° / 47°N 5 mph
Today's Weather - Louisville, KY

9 AM PST

Showers And Thunderstorms

59°F

DAYDESCRIPTIONHIGH / LOWWIND
TodayShowers And Thunderstorms63° / 51°N 8 mph
SundayShowers And Thunderstorms60° / 48°W 9 mph
MondayShowers And Thunderstorms Likely60° / 47°SW 8 mph
TuesdayMostly Sunny71° / 51°W 3 to 7 mph
WednesdayChance Rain Showers72° / 56°E 2 to 6 mph
ThursdayChance Rain Showers73° / 51°NE 5 to 9 mph
FridayChance Showers And Thunderstorms72° / 52°NE 9 mph
Average Monthly High / Low (°F)
MonthBoulder, COLouisville, KY
January47° / 19°42° / 26°
February48° / 20°47° / 29°
March55° / 27°57° / 36°
April62° / 34°68° / 46°
May72° / 43°77° / 56°
June82° / 51°85° / 65°
July88° / 57°88° / 68°
August86° / 55°87° / 67°
September78° / 46°81° / 59°
October66° / 36°69° / 47°
November54° / 26°57° / 38°
December45° / 18°45° / 29°
Hot, Freezing, Rainy, Snowy Days: Boulder / Louisville
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 028 / 235 / 105 / 2
February0 / 025 / 185 / 95 / 2
March0 / 023 / 117 / 116 / 1
April0 / 013 / 29 / 114 / 0
May1 / 02 / 011 / 121 / 0
June6 / 50 / 09 / 100 / 0
July14 / 100 / 09 / 90 / 0
August9 / 100 / 010 / 80 / 0
September3 / 31 / 07 / 70 / 0
October0 / 010 / 16 / 82 / 0
November0 / 022 / 85 / 104 / 0
December0 / 028 / 205 / 115 / 2
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.

July is the hottest month for Louisville-Jefferson County with an average high temperature of 87.6°, which ranks it as warmer than most places in Kentucky. In Louisville-Jefferson County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Louisville-Jefferson County are May, September and June.
December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

January has the coldest nighttime temperatures for Louisville-Jefferson County with an average of 25.5°. This is warmer than most places in Kentucky.

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 Louisville-Jefferson County, there are 29.0 days annually when the high temperature is over 90°, which is about average compared to other places in Kentucky.

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 Louisville-Jefferson County, there are 82.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Kentucky.

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

In Louisville-Jefferson County, there are 0.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Kentucky.

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 wettest month in Louisville-Jefferson County with 5.2 inches of rain, and the driest month is September with 3.2 inches. The wettest season is Summer with 29% of yearly precipitation and 22% occurs in Winter, which is the driest season. The annual rainfall of 46.2 inches in Louisville-Jefferson County means that it is drier than most places in Kentucky.

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.

May is the rainiest month in Louisville-Jefferson County with 11.7 days of rain, and September is the driest month with only 7.2 rainy days. There are 115.3 rainy days annually in Louisville-Jefferson County, which is about average compared to other places in Kentucky. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.

An annual snowfall of 8.7 inches in Louisville-Jefferson County means that it is about average compared to other places in Kentucky.
March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

February is the snowiest month in Louisville-Jefferson County with 2.9 inches of snow, and 4 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 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

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Reviews for Louisville    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

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Zips In Boulder, Colorado
80302, 80304, 80301, 80303, 80305, 80310
Zips In LOUISVILLE, KENTUCKY
40214, 40216, 40299, 40219, 40229, 40272, 40291, 40245, 40218, 40220, 20 total
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