January weather forecastKey Biscayne, FL
January
Weather in January
January, the same as December, in Key Biscayne, Florida, is an agreeable winter month, with an average temperature varying between 73°F (22.8°C) and 65.1°F (18.4°C).Temperature
Key Biscayne records the coldest temperatures in January, averaging a high of 73°F (22.8°C) and a low of 65.1°F (18.4°C).Humidity
The average relative humidity in January is 73%.Rainfall
The month with the least rainfall is January, when the rain falls for 9.2 days and typically collects 0.43" (11mm) of precipitation.Ocean temperature
In Key Biscayne, the average seawater temperature in January is 74.1°F (23.4°C).Note: Individual cold sensitivities, influenced by sunshine, wind, and the ambient temperature, play a role in finding a swim in 74.1°F (23.4°C) water pleasant. (Olympic swimming events mandate water temperatures from 77°F (25°C) to 82.4°F (28°C).)
Daylight
In Key Biscayne, the average length of the day in January is 10h and 45min.On the first day of January, sunrise is at 7:07 am and sunset at 5:41 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:03 pm EST.
Sunshine
In January, the average sunshine is 6.5h.UV index
The months with the lowest UV index in Key Biscayne are January and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 5 during January translates into these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Key Biscayne, FL
- Average high temperature in January: 73°F
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is January (73°F).
- Average low temperature in January: 65.1°F
The month with the highest average low temperature is August (82.6°F).
The coldest month (with the lowest average low temperature) is January (65.1°F).
Average pressure in January
Key Biscayne, FL
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).
Average wind speed in January
Key Biscayne, FL
- Average wind speed in January: 11.5mph
The windiest month (with the highest average wind speed) is March (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in January
Key Biscayne, FL
- Average humidity in January: 73%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (70%).
Average rainfall in January
Key Biscayne, FL
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is August (2.8").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in January
Key Biscayne, FL
- Average rainfall days in January: 9.2 days
The month with the highest number of rainy days is September (24.5 days).
The month with the least rainy days is February (8.7 days).
Average sea temperature in January
Key Biscayne, FL
- Average sea temperature in January: 74.1°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).
Average daylight in January /
Average sunshine in January
Key Biscayne, FL
- Average daylight in January: 10h and 42min
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 30min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in January
Key Biscayne, FL
- Average sunshine days in January: 16.6 days
The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (3.2 days).
Average UV index in January
Key Biscayne, FL
- Average UV index in January: 5
The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January and December (UV index 5).
Average cloud cover in January
Key Biscayne, FL
- Average cloud cover in January: 33
The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility in January
Key Biscayne, 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).
