2025 Compare Climate & Weather:
Key West, FL vs Marathon, FL

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Highlights

On average, there are 250 sunny days per year in Marathon. Key West averages 260 sunny days per year. The US average is 205 sunny days.

Marathon, Florida gets 45.1 inches of rain, on average, per year. Key West, Florida gets 43.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Marathon averages 0 inches of snow per year. Key West averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Marathon, Florida
Summer High: the July high is around 90 degrees
Winter Low: the January low is 62.8
Rain: averages 45.1 inches of rain a year
Snow: averages 0 inches of snow a year

Key West, Florida
Summer High: the July high is around 89.4 degrees
Winter Low: the January low is 63.6
Rain: averages 43.8 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

Marathon

The annual BestPlaces Comfort Index for Marathon is 6.0 (10=best), which means it is one of the least comfortable places in Florida.

6 / 10

January, February and December are the most pleasant months in Marathon, while August and July are the least comfortable months.

Key West

The annual BestPlaces Comfort Index for Key West is 6.1 (10=best), which means it is one of the least comfortable places in Florida.

6.1 / 10

January, February and December are the most pleasant months in Key West, while August and September are the least comfortable months.

Average Monthly High / Low (°F)

Month	Key West, FL	Marathon, FL
January	75° / 64°	75° / 63°
February	77° / 66°	77° / 65°
March	79° / 68°	79° / 67°
April	82° / 71°	82° / 71°
May	85° / 75°	86° / 75°
June	88° / 78°	89° / 78°
July	89° / 80°	90° / 79°
August	90° / 79°	90° / 79°
September	88° / 78°	89° / 78°
October	85° / 76°	85° / 75°
November	80° / 71°	81° / 70°
December	76° / 67°	77° / 66°

Hot, Freezing, Rainy, Snowy Days: Key West / Marathon

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	0 / 0	6 / 6	0 / 0
February	0 / 0	0 / 0	5 / 5	0 / 0
March	0 / 0	0 / 0	6 / 5	0 / 0
April	0 / 0	0 / 0	4 / 5	0 / 0
May	1 / 1	0 / 0	7 / 6	0 / 0
June	5 / 10	0 / 0	11 / 10	0 / 0
July	11 / 17	0 / 0	11 / 12	0 / 0
August	14 / 20	0 / 0	14 / 12	0 / 0
September	6 / 10	0 / 0	15 / 14	0 / 0
October	1 / 1	0 / 0	11 / 10	0 / 0
November	0 / 0	0 / 0	6 / 7	0 / 0
December	0 / 0	0 / 0	6 / 7	0 / 0

August is the hottest month for Key West with an average high temperature of 89.6°, which ranks it as one of the coolest places in Florida. In Key West, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Key West are March, February and December.

August is the hottest month for Marathon with an average high temperature of 90.4°, which ranks it as cooler than most places in Florida. In Marathon, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Marathon are December, February and March.

January has the coldest nighttime temperatures for Key West with an average of 63.6°. This is one of the warmest places in Florida.

January has the coldest nighttime temperatures for Marathon with an average of 62.8°. This is one of the warmest places in Florida.

In Key West, there are 37.7 days annually when the high temperature is over 90°, which is one of the coolest places in Florida.

In Marathon, there are 58.9 days annually when the high temperature is over 90°, which is cooler than most places in Florida.

In Key West, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

In Marathon, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

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

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

September is the wettest month in Key West with 7.5 inches of rain, and the driest month is February with 1.8 inches. The wettest season is Autumn with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 43.8 inches in Key West means that it is one of the driest places in Florida.

September is the wettest month in Marathon with 7.4 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 35% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 45.1 inches in Marathon means that it is one of the driest places in Florida.

September is the rainiest month in Key West with 15.3 days of rain, and April is the driest month with only 4.4 rainy days. There are 102.0 rainy days annually in Key West, which is one of the least rainy places in Florida. The rainiest season is Autumn when it rains 35% of the time and the driest is Summer with only a 16% chance of a rainy day.

September is the rainiest month in Marathon with 14.1 days of rain, and April is the driest month with only 4.5 rainy days. There are 99.3 rainy days annually in Marathon, which is one of the least rainy places in Florida. The rainiest season is Autumn when it rains 34% of the time and the driest is Summer with only a 16% chance of a rainy day.

There is rarely any recorded snowfall in Key West, ranking it as one of the least snowy places in Florida.

There is rarely any recorded snowfall in Marathon, ranking it as one of the least snowy places in Florida.

Any measurable snowfall is a rare occurance in Key West.

Any measurable snowfall is a rare occurance in Marathon.

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 Key West 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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Reviews for Marathon 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 Marathon

See all reviews

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2025 Compare Climate & Weather:
Key West, FL vs Marathon, FL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Key West / Marathon

January has the coldest nighttime temperatures for Key West with an average of 63.6°. This is one of the warmest places in Florida.

January has the coldest nighttime temperatures for Marathon with an average of 62.8°. This is one of the warmest places in Florida.

In Key West, there are 37.7 days annually when the high temperature is over 90°, which is one of the coolest places in Florida.

In Marathon, there are 58.9 days annually when the high temperature is over 90°, which is cooler than most places in Florida.

In Key West, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

In Marathon, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

There is rarely any recorded snowfall in Key West, ranking it as one of the least snowy places in Florida.

There is rarely any recorded snowfall in Marathon, ranking it as one of the least snowy places in Florida.

Any measurable snowfall is a rare occurance in Key West.

Any measurable snowfall is a rare occurance in Marathon.

DID YOU KNOW?

Reviews for Key West 2 Reviews

Reviews for Marathon 2 Reviews

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2025 Compare Climate & Weather:Key West, FL vs Marathon, FL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Key West / Marathon

January has the coldest nighttime temperatures for Key West with an average of 63.6°. This is one of the warmest places in Florida.January has the coldest nighttime temperatures for Marathon with an average of 62.8°. This is one of the warmest places in Florida.

In Key West, there are 37.7 days annually when the high temperature is over 90°, which is one of the coolest places in Florida.In Marathon, there are 58.9 days annually when the high temperature is over 90°, which is cooler than most places in Florida.

In Key West, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.In Marathon, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

There is rarely any recorded snowfall in Key West, ranking it as one of the least snowy places in Florida.There is rarely any recorded snowfall in Marathon, ranking it as one of the least snowy places in Florida.

Any measurable snowfall is a rare occurance in Key West.Any measurable snowfall is a rare occurance in Marathon.

DID YOU KNOW?

Reviews for Key West 2 Reviews

Reviews for Marathon 2 Reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Zips In Key West, Florida

Zips In MARATHON, FLORIDA

Learn More About KEY WEST, FLORIDA

Learn More About Marathon, Florida

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BestPlaces Tools

About BestPlaces

Follow Us

2025 Compare Climate & Weather:
Key West, FL vs Marathon, FL

January has the coldest nighttime temperatures for Key West with an average of 63.6°. This is one of the warmest places in Florida.

January has the coldest nighttime temperatures for Marathon with an average of 62.8°. This is one of the warmest places in Florida.

In Key West, there are 37.7 days annually when the high temperature is over 90°, which is one of the coolest places in Florida.

In Marathon, there are 58.9 days annually when the high temperature is over 90°, which is cooler than most places in Florida.

In Key West, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

In Marathon, there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Florida.

There is rarely any recorded snowfall in Key West, ranking it as one of the least snowy places in Florida.

There is rarely any recorded snowfall in Marathon, ranking it as one of the least snowy places in Florida.

Any measurable snowfall is a rare occurance in Key West.

Any measurable snowfall is a rare occurance in Marathon.