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

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Highlights

On average, there are 256 sunny days per year in Key Largo. Marathon averages 250 sunny days per year. The US average is 205 sunny days.

Key Largo, Florida gets 50 inches of rain, on average, per year. Marathon, Florida gets 45.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

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

Weather Highlights

Key Largo, Florida
Summer High: the July high is around 89.1 degrees
Winter Low: the January low is 61.4
Rain: averages 50 inches of rain a year
Snow: averages 0 inches of snow a year

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

BestPlaces Comfort Index

Key Largo

The annual BestPlaces Comfort Index for Key Largo is 6.4 (10=best), which means it is less comfortable than most places in Florida.

6.4 / 10

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

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.

Average Monthly High / Low (°F)

Month	Marathon, FL	Key Largo, FL
January	75° / 63°	75° / 61°
February	77° / 65°	77° / 64°
March	79° / 67°	78° / 66°
April	82° / 71°	82° / 70°
May	86° / 75°	84° / 74°
June	89° / 78°	87° / 77°
July	90° / 79°	89° / 78°
August	90° / 79°	89° / 78°
September	89° / 78°	88° / 77°
October	85° / 75°	85° / 75°
November	81° / 70°	81° / 70°
December	77° / 66°	77° / 65°

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

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	0 / 0	6 / 6	0 / 0
February	0 / 0	0 / 0	5 / 6	0 / 0
March	0 / 0	0 / 0	5 / 7	0 / 0
April	0 / 0	0 / 0	5 / 6	0 / 0
May	1 / 1	0 / 0	6 / 9	0 / 0
June	10 / 4	0 / 0	10 / 15	0 / 0
July	17 / 10	0 / 0	12 / 14	0 / 0
August	20 / 11	0 / 0	12 / 17	0 / 0
September	10 / 6	0 / 0	14 / 16	0 / 0
October	1 / 1	0 / 0	10 / 11	0 / 0
November	0 / 0	0 / 0	7 / 7	0 / 0
December	0 / 0	0 / 0	7 / 7	0 / 0

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.

August is the hottest month for Key Largo with an average high temperature of 89.4°, which ranks it as one of the coolest places in Florida. In Key Largo, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Key Largo are March, February and December.

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

January has the coldest nighttime temperatures for Key Largo with an average of 61.4°. This is one of the warmest 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 Largo, there are 32.4 days annually when the high temperature is over 90°, which is one of the coolest 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 Largo, 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 zero°, which is about average compared to other places in Florida.

In Key Largo, 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 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 wettest month in Key Largo with 7.7 inches of rain, and the driest month is January with 2.0 inches. The wettest season is Autumn with 37% of yearly precipitation and 12% occurs in Spring, which is the driest season. The annual rainfall of 50.0 inches in Key Largo means that it is one of the driest places in Florida.

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.

August is the rainiest month in Key Largo with 16.5 days of rain, and April is the driest month with only 5.5 rainy days. There are 118.7 rainy days annually in Key Largo, which is rainier than most places in Florida. The rainiest season is Autumn when it rains 38% of the time and the driest is Spring with only a 16% chance of a rainy day.

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

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

Any measurable snowfall is a rare occurance in Marathon.

Any measurable snowfall is a rare occurance in Key Largo.

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 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

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Reviews for Key Largo 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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See all reviews

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

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

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

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

January has the coldest nighttime temperatures for Key Largo with an average of 61.4°. This is one of the warmest 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 Largo, there are 32.4 days annually when the high temperature is over 90°, which is one of the coolest 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 Largo, 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 Marathon, ranking it as one of the least snowy places in Florida.

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

Any measurable snowfall is a rare occurance in Marathon.

Any measurable snowfall is a rare occurance in Key Largo.

DID YOU KNOW?

Reviews for Marathon 2 Reviews

Reviews for Key Largo 2 Reviews

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

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

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

January has the coldest nighttime temperatures for Marathon with an average of 62.8°. This is one of the warmest places in Florida.January has the coldest nighttime temperatures for Key Largo with an average of 61.4°. This is one of the warmest 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 Largo, there are 32.4 days annually when the high temperature is over 90°, which is one of the coolest 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 Largo, 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 Marathon, ranking it as one of the least snowy places in Florida.There is rarely any recorded snowfall in Key Largo, ranking it as one of the least snowy places in Florida.

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

DID YOU KNOW?

Reviews for Marathon 2 Reviews

Reviews for Key Largo 2 Reviews

Most Recent Searches On Compare Climate & Weather

Compare Cost of Living

Zips In Marathon, Florida

Zips In KEY LARGO, FLORIDA

Learn More About MARATHON, FLORIDA

Learn More About Key Largo, Florida

Premium Subscription

BestPlaces Tools

About BestPlaces

Follow Us

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

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

January has the coldest nighttime temperatures for Key Largo with an average of 61.4°. This is one of the warmest 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 Largo, there are 32.4 days annually when the high temperature is over 90°, which is one of the coolest 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 Largo, 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 Marathon, ranking it as one of the least snowy places in Florida.

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

Any measurable snowfall is a rare occurance in Marathon.

Any measurable snowfall is a rare occurance in Key Largo.