Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
With an average high-temperature of 72.7°F (22.6°C) and an average low-temperature of 68.5°F (20.3°C), January is the coldest month.Humidity
In January, the average relative humidity in Key West is 76%.Rainfall
In Key West, it is raining for 12.3 days, with typically 1.34" (34mm) of accumulated precipitation. In Key West, during the entire year, the rain falls for 199.2 days and collects up to 31.61" (803mm) of precipitation.Ocean temperature
The months with the coldest seawater in Key West, Florida, are January and February, with an average ocean temperature of 71.2°F (21.8°C).Note: For most, swimming in 71.2°F (21.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
In January, the average length of the day in Key West is 10h and 49min.On the first day of the month, sunrise is at 7:11 am and sunset at 5:50 pm. On the last day of January, in Key West, Florida, sunrise is at 7:09 am and sunset at 6:11 pm EST.
Sunshine
In Key West, the average sunshine in January is 7.2h.UV index
January is the month with the lowest UV index, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily maximum UV index of 5 in January interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
FAQ
What is the coldest month in Key West?
What is the temperature in January in Key West?
What is the average humidity in January in Key West?
How many days does it rain in January in Key West?
What months are the ocean coldest in Key West?
How cold is the water in January in Key West?
What is the average length of the day in January in Key West?
When is the sunrise / sunset in January in Key West?
How many hours of sunshine does Key West have in January?
When is the lowest UV index in Key West?
How high is the UV index in January in Key West?
Average temperature in January
Key West, FL
- Average high temperature in January: 72.7°F
The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in January: 68.5°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 (68.5°F).
Average pressure in January
Key West, FL
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are September and October (29.93"Hg).
Average wind speed in January
Key West, FL
- Average wind speed in January: 14.4mph
The windiest months (with the highest average wind speed) are January and November (14.4mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).
Average humidity in January
Key West, FL
- Average humidity in January: 76%
The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are July, August and September (74%).
Average rainfall in January
Key West, FL
- Average rainfall in January: 1.34"
The wettest month (with the highest rainfall) is September (5.12").
The driest month (with the least rainfall) is March (0.67").
Average rainfall days in January
Key West, FL
- Average rainfall days in January: 12.3 days
The months with the highest number of rainy days are August and September (23.1 days).
The month with the least rainy days is February (11 days).
Average sea temperature in January
Key West, FL
- Average sea temperature in January: 71.2°F
The best month for swimming (with the highest average sea temperature) is August (86.9°F).
The coldest months (with the lowest average sea temperature) are January and February (71.2°F).
Average daylight in January /
Average sunshine in January
Key West, FL
- Average daylight in January: 10h and 5min
The month with the longest days is June (Average daylight: 13h and 36min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in January: 7h and 1min
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 18min).
Average sunshine days in January
Key West, FL
- Average sunshine days in January: 14 days
The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (4.5 days).
Average UV index in January
Key West, 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).
Average cloud cover in January
Key West, FL
- Average cloud cover in January: 34
The month with the most cloud cover is January (Cloud cover 34).
The month with the least cloud cover is April (Cloud cover 23).
Average visibility in January
Key West, 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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