January weather forecast
Siesta Key, FL

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Weather in January

January, like December, is another pleasant winter month in Siesta Key, Florida, with an average temperature varying between 68.5°F and 56.1°F.

Temperature

In Siesta Key, the month of January registers the lowest temperatures, averaging 68.5°F at the peak and 56.1°F at the lowest.

Humidity

In January, the average relative humidity is 73%.

Rainfall

In Siesta Key, in January, it is raining for 8.3 days, with typically 1.22" of accumulated precipitation. In Siesta Key, during the entire year, the rain falls for 183.1 days and collects up to 34.92" of precipitation.

Ocean temperature

The month with the coldest seawater in Siesta Key is January, with an average ocean temperature of 64°F.
Note: In water of 64°F, the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 69.8°F to 59°F.

Daylight

In Siesta Key, Florida, the average length of the day in January is 10h and 39min.
On the first day of January in Siesta Key, Florida, sunrise is at 7:19 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

The average sunshine in January in Siesta Key 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 exposure to the Sun's UV rays for the ordinary person.
Note: In January, the maximum UV index of 4 translates into these guidelines:
Heed the precautions - Suggestions to avoid sunburn are made. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What is the coldest month in Siesta Key?

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

What are the temperatures in Siesta Key in January?

In January, the average high-temperature and low-temperature in Siesta Key are 68.5°F and 56.1°F respectively.

What is the average humidity in January in Siesta Key?

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

How much does it rain in Siesta Key in January?

In Siesta Key, during January, the rain falls for 8.3 days and regularly aggregates up to 1.22" of precipitation.

When is the ocean coldest in Siesta Key?

With an average ocean temperature of 64°F, January is the month with the coldest seawater in Siesta Key, Florida.

How cold is the water in January in Siesta Key?

In January, the average ocean temperature in Siesta Key is 64°F. For swimming, a surface water temperature of 64°F is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F.

What is the average length of the day in January in Siesta Key?

The average day length in January is 10h and 39min.

What time are sunrise and sunset in January in Siesta Key?

In January, on the first day of the month, sunrise is at 7:19 am and sunset at 5:47 pm. On the last day of the month, in Siesta Key, sunrise is at 7:16 am and sunset at 6:10 pm EST.

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

The average sunshine duration in January is 7.3h.

When is the lowest UV index in Siesta Key?

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

How high is the UV index in January in Siesta Key?

The average daily maximum UV index in January in Siesta Key, Florida, is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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 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).

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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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Siesta Key, Florida, USA

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