January weather forecast
Siesta Key, FL

Weather in January

January, the same as December, in Siesta Key, Florida, is an agreeable winter month, with an average temperature varying between 56.1°F (13.4°C) and 68.5°F (20.3°C).

Temperature

With an average high-temperature of 68.5°F (20.3°C) and an average low-temperature of 56.1°F (13.4°C), January is the coldest month.

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, in Siesta Key, there are 183.1 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Ocean temperature

With an average ocean temperature of 64°F (17.8°C), January is the month with the coldest seawater.
Note: For most, swimming in 64°F (17.8°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 is 10h and 39min.
On the first day of January, sunrise is at 7:20 am and sunset at 5:47 pm. On the last day of the month, 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

The month with the lowest UV index in Siesta Key is January, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in January transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the coldest month in Siesta Key?

The coldest month in Siesta Key is January, with an average high-temperature of 68.5°F (20.3°C) and an average low-temperature of 56.1°F (13.4°C).

What is the average humidity in January in Siesta Key?

In Siesta Key, Florida, the average relative humidity in January is 73%.

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

In January, in Siesta Key, Florida, the rain falls for 8.3 days. Throughout January, 1.22" (31mm) of precipitation is accumulated.

What is the month with the coldest ocean in Siesta Key?

With an average ocean temperature of 64°F (17.8°C), January is the month with the coldest seawater.

What is the ocean temperature in January in Siesta Key?

In Siesta Key, Florida, the average seawater temperature in January is 64°F (17.8°C). Swimming in 64°F (17.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

The average day length in January in Siesta Key, Florida, is 10h and 39min.

When are sunrise and sunset in January in Siesta Key?

On the first day of January, sunrise is at 7:20 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:10 pm EST.

How long on average sun shines in January in Siesta Key?

In Siesta Key, Florida, the average sunshine duration in January is 7.3h.

What is the month with the lowest UV index in Siesta Key?

The month with the lowest UV index in Siesta Key, Florida, is January, with an average maximum UV index of 4.

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

The average daily maximum UV index in January in Siesta Key, Florida, is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.

Average temperature in January
Siesta Key, FL

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).

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Average pressure in January
Siesta Key, FL

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).

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Average wind speed in January
Siesta Key, FL

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).

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Average humidity in January
Siesta Key, FL

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%).

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Average rainfall in January
Siesta Key, FL

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").

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Average rainfall days in January
Siesta Key, FL

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).

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Average sea temperature in January
Siesta Key, FL

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).

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

Average daylight in January / Average sunshine in January - Siesta Key, FL
  • Average daylight in January: 10h and 39min

The month with the longest days is June (Average daylight: 13h and 50min).
The month with the shortest days is December (Average daylight: 10h and 28min).

  • Average sunshine in January: 7h and 18min

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).

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Average sunshine days in January
Siesta Key, FL

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).

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Average UV index in January
Siesta Key, FL

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).

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Average cloud cover in January
Siesta Key, FL

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).

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Average visibility in January
Siesta Key, FL

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).

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