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
During the coldest month, January, temperatures average a high of 68.5°F (20.3°C) and a low of 56.1°F (13.4°C).Humidity
In Siesta Key, the average relative humidity in January is 73%.Rainfall
In Siesta Key, in January, during 8.3 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, there are 183.1 rainfall days, and 34.92" (887mm) of precipitation is accumulated.Ocean temperature
The month with the coldest seawater is January, with an average ocean temperature of 64°F (17.8°C).Note: A surface water temperature of 64°F (17.8°C) does not provide an enjoyable swimming experience for most. Breathing control becomes more challenging as the water temperature drops below 69.8°F (21°C).
Daylight
The average length of the day in January is 10h and 39min.On the first day of the month, sunrise is at 7:19 am and sunset at 5:47 pm. On the last day of January, sunrise is at 7:16 am and sunset at 6:10 pm EST.
Sunshine
In Siesta Key, the average sunshine in January is 7.3h.UV index
January is the month with the lowest UV index, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In January, a daily maximum UV index of 4 leads to the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
What are January temperatures?
What is the average humidity in January?
How many days does it rain in January?
What month is the ocean coldest?
How cold is the water in January?
How many hours of daylight does Siesta Key have in January?
When are sunrise and sunset in January in Siesta Key?
How many hours of sunshine does Siesta Key have in January?
What is the month with the lowest UV index in Siesta Key?
How high is the UV index in January?
Average temperature in January
Siesta Key, FL
- Average high temperature in January: 68.5°F
The warmest month (with the highest average high temperature) is August (88.5°F).
The month with the lowest average high temperature is January (68.5°F).
- Average low temperature in January: 56.1°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).
Average pressure in January
Siesta Key, FL
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in January
Siesta Key, FL
- Average wind speed in January: 9.3mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in January
Siesta Key, FL
- Average humidity in January: 73%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are March, April and May (72%).
Average rainfall in January
Siesta Key, FL
- Average rainfall in January: 1.22"
The wettest month (with the highest rainfall) is August (6.42").
The driest months (with the least rainfall) are February and November (1.06").
Average rainfall days in January
Siesta Key, FL
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is August (26.8 days).
The months with the least rainy days are January, February and November (8.3 days).
Average sea temperature in January
Siesta Key, FL
- Average sea temperature in January: 64.1°F
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).
Average daylight in January /
Average sunshine in January
Siesta Key, FL
- Average daylight in January: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in January: 7h and 2min
The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in January
Siesta Key, FL
- Average sunshine days in January: 21.1 days
The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is August (2.5 days).
Average UV index in January
Siesta Key, FL
- Average UV index in January: 4
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in January
Siesta Key, FL
- Average cloud cover in January: 30
The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 22).
Average visibility in January
Siesta Key, 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).
Siesta Key, Florida, USA
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