January weather forecast
Key Largo, FL

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A clear seascape and cloudy evening sky in Key Largo, Florida
A clear seascape and cloudy evening sky in Key Largo, Florida

Weather in January

With a gentle start to the year, Key Largo experiences mild and moderately rainy conditions in January. The transition from the chillier December to gradually warming temperatures signifies the onset of a pleasant time for outdoor activities. The sea remains at a comfortably warm temperature and the daylight hours slowly start to increase, providing an inviting atmosphere for water-sports enthusiasts. Despite a few cloudy days, the sun prominently graces the Key Largo skyline more than the previous month. January records show 66.9°F (19.4°C) as the lowest temperature and rainfall amounts of 0.75" (19mm).

Temperature

With average temperatures fluctuating between a high of 72.7°F (22.6°C) and a low of 66.9°F (19.4°C), January stands out as the coldest month in Key Largo, Florida.

Humidity

The average relative humidity in January is 75%.

Rainfall

In Key Largo, Florida, during January, the rain falls for 10.7 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Key Largo, during the entire year, the rain falls for 190.1 days and collects up to 27.05" (687mm) of precipitation.

Ocean temperature

In Key Largo, the average seawater temperature in January is 74.1°F (23.4°C).
Note: Individual preferences to cold, influenced by conditions such as sunshine, wind, and surrounding temperature, play a part in the comfort of swimming in 74.1°F (23.4°C) waters. (As an aside, Olympic swimming standards dictate water temperatures from 77°F (25°C) to 82.4°F (28°C).)

Daylight

The average length of the day in January in Key Largo is 10h and 47min.
On the first day of the month, sunrise is at 7:06 am and sunset at 5:43 pm. On the last day of January, sunrise is at 7:04 am and sunset at 6:05 pm EST.

Sunshine

In Key Largo, the average sunshine in January is 6.7h.

UV index

With an average maximum UV index of 5, January is the month with the lowest UV index in Key Largo, Florida. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 5 in January translates into these instructions:
Be vigilant - Preventing sunburn is recommended. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Beware! Reflecting off water and sand, UV rays are much stronger.
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Frequently asked questions

What are the coldest months in Key Largo?

In Key Largo, January records the average lowest temperatures, peaking at 72.7°F (22.6°C) and reaching a low of 66.9°F (19.4°C).

What are January temperatures in Key Largo?

An average high-temperature, in January, in Key Largo, is 72.7°F (22.6°C) and the average low-temperature is 66.9°F (19.4°C).

What is the average humidity in January in Key Largo?

In Key Largo, the average relative humidity in January is 75%.

How many days does it rain in January in Key Largo?

In January, the rain falls for 10.7 days. Throughout January, 0.75" (19mm) of precipitation is accumulated.

What is the water temperature in January in Key Largo?

In Key Largo, Florida, in January, the average water temperature is 74.1°F (23.4°C). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 74.1°F (23.4°C) water.

How many hours of daylight does Key Largo have in January?

In Key Largo, the average day length in January is 10h and 47min.

When is the sunrise / sunset in January in Key Largo?

In January, on the first day of the month, sunrise is at 7:06 am and sunset at 5:43 pm. On the last day of the month, in Key Largo, Florida, sunrise is at 7:04 am and sunset at 6:05 pm EST.

How many hours of sunshine does Key Largo have in January?

In January, the average sunshine duration in Key Largo, Florida, is 6.7h.

When is the lowest UV index in Key Largo?

January is the month with the lowest UV index in Key Largo, Florida, with an average maximum UV index of 5.

What is the UV index intensity in January in Key Largo?

In January, the average daily maximum UV index in Key Largo, Florida, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Key Largo, FL

Average temperature in January - Key Largo, FL
  • Average high temperature in January: 72.7°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).

  • Average low temperature in January: 66.9°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).

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Average pressure in January
Key Largo, FL

Average pressure in January - Key Largo, FL
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).

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Average wind speed in January
Key Largo, FL

Average wind speed in January - Key Largo, FL
  • Average wind speed in January: 12.9mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

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Average humidity in January
Key Largo, FL

Average humidity in January - Key Largo, FL
  • Average humidity in January: 75%

The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in January
Key Largo, FL

Average rainfall in January - Key Largo, FL
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").

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Average rainfall days in January
Key Largo, FL

Average rainfall days in January - Key Largo, FL
  • Average rainfall days in January: 10.7 days

The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).

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Average sea temperature in January
Key Largo, FL

Average sea temperature in January - Key Largo, FL
  • Average sea temperature in January: 74.2°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).

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Average daylight in January /
Average sunshine in January
Key Largo, FL

Average daylight in January / Average sunshine in January - Key Largo, FL
  • Average daylight in January: 10h and 5min

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

  • Average sunshine in January: 6h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in January
Key Largo, FL

Average sunshine days in January - Key Largo, FL
  • Average sunshine days in January: 17.3 days

The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).

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Average UV index in January
Key Largo, FL

Average UV index in January - Key Largo, FL
  • Average UV index in January: 5

The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).

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Average cloud cover in January
Key Largo, FL

Average cloud cover in January - Key Largo, FL
  • Average cloud cover in January: 34

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

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Average visibility in January
Key Largo, FL

Average visibility in January - Key Largo, FL
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Key Largo, Florida, USA

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