Climate and monthly 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). 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. Weather in January »

Weather in February

February, the last month of the winter in Siesta Key, is also an agreeable month, with an average temperature varying between 58.6°F (14.8°C) and 71.2°F (21.8°C). In February, the average high-temperature is relatively the same as in January - a still pleasant 71.2°F (21.8°C). Weather in February »

Weather in March

March, the first month of the spring in Siesta Key, is a moderately hot month, with an average temperature ranging between max 74.1°F (23.4°C) and min 61.5°F (16.4°C). In March, the average high-temperature is relatively the same as in February - a moderately hot 74.1°F (23.4°C). Weather in March »

Weather in April

April, the same as March, is a moderately hot spring month in Siesta Key, Florida, with an average temperature fluctuating between 80.2°F (26.8°C) and 67.8°F (19.9°C). In Siesta Key, the average high-temperature in April marginally rises from 74.1°F (23.4°C) in March to a still warm 80.2°F (26.8°C). Weather in April »

Weather in May

May, the last month of the spring in Siesta Key, is also a moderately hot month, with an average temperature fluctuating between 72.7°F (22.6°C) and 84.2°F (29°C). In May, the average high-temperature is relatively the same as in April - a still moderately hot 84.2°F (29°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Siesta Key, Florida, with an average temperature fluctuating between 87.3°F (30.7°C) and 77.5°F (25.3°C). In June, the average high-temperature is practically the same as in May - a hot 87.3°F (30.7°C). Weather in June »

Weather in July

July, the same as June, in Siesta Key, Florida, is another hot summer month, with an average temperature fluctuating between 88°F (31.1°C) and 78.8°F (26°C). In Siesta Key, the average high-temperature in July is essentially the same as in June - a still tropical 88°F (31.1°C). Weather in July »

Weather in August

August, the last month of the summer in Siesta Key, is another hot month, with an average temperature ranging between min 79.7°F (26.5°C) and max 88.5°F (31.4°C). The warmest month is August, with an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 79.7°F (26.5°C). In August, the average heat index is computed to be a scorching 104°F (40°C). Weather in August »

Weather in September

September, the first month of the autumn in Siesta Key, is still a tropical month, with an average temperature ranging between max 86.9°F (30.5°C) and min 77.4°F (25.2°C). In September, the average high-temperature is almost the same as in August - a still hot 86.9°F (30.5°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Siesta Key, Florida, with temperature in the range of an average high of 82.6°F (28.1°C) and an average low of 71.8°F (22.1°C). In October, the average high-temperature is essentially the same as in September - a moderately hot 82.6°F (28.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a moderately hot month in Siesta Key, Florida, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 64.4°F (18°C). In November, the average high-temperature marginally drops from 82.6°F (28.1°C) in October to a still warm 76.3°F (24.6°C). Weather in November »

Weather in December

The first month of the winter, December, is still a pleasant month in Siesta Key, Florida, with an average temperature varying between 60.8°F (16°C) and 72.5°F (22.5°C). In December, the average high-temperature is relatively the same as in November - a pleasant 72.5°F (22.5°C). Weather in December »
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FAQ

What is the coldest month in Siesta Key?

The coldest month 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).

How many days does it rain in Siesta Key?

In Siesta Key, during the entire year, the rain falls for 183.1 days and collects up to 34.92" (887mm) of precipitation.

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 month with the lowest UV index in Siesta Key?

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

What is the driest month in Siesta Key?

The months with the least rainfall are February and November Rain falls for 8.3 days and accumulates 1.06" (27mm) of rain.

What are the least humid months in Siesta Key?

March through May, with an average relative humidity of 72%, are the least humid months.

When is Daylight Saving Time (DST) in Siesta Key?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Siesta Key, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What month has the most sunshine in Siesta Key?

The month with the most sunshine in Siesta Key is May, with an average of 11.1h of sunshine.

When is the highest UV index in Siesta Key?

The months with the highest UV index in Siesta Key are May through September, with an average maximum UV index of 7.

When are the longest days in Siesta Key?

June has the longest days of the year in Siesta Key, Florida, with an average of 13h and 50min of daylight.

What is the warmest month in Siesta Key?

August is the warmest month in Siesta Key, with an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 79.7°F (26.5°C).

What is the wettest month in Siesta Key?

August is the month with the most rainfall in Siesta Key. Rain falls for 26.8 days and accumulates 6.42" (163mm) of precipitation.

When is the ocean warmest in Siesta Key?

With an average ocean temperature of 86.7°F (30.4°C), August is the month with the warmest seawater in Siesta Key.

What is the most humid month in Siesta Key?

December is the most humid month in Siesta Key, Florida, with an average relative humidity of 76%.

What is the month with the shortest days in Siesta Key?

With an average of 10h and 28min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Siesta Key?

The month with the least sunshine in Siesta Key, Florida, is December, with an average of 6.5h of sunshine.

Average temperature
Siesta Key, FL

Average temperature - Siesta Key, FL

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).

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
Siesta Key, FL

Average pressure - Siesta Key, FL

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
Siesta Key, FL

Average wind speed - Siesta Key, FL

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
Siesta Key, FL

Average humidity - Siesta Key, FL

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
Siesta Key, FL

Average rainfall - Siesta Key, FL

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
Siesta Key, FL

Average rainfall days - Siesta Key, FL

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
Siesta Key, FL

Average sea temperature - Siesta Key, FL

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 / Average sunshine
Siesta Key, FL

Average daylight / Average sunshine - Siesta Key, FL

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).

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
Siesta Key, FL

Average sunshine days - Siesta Key, FL

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
Siesta Key, FL

Average UV index - Siesta Key, FL

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 visibility
Siesta Key, FL

Average visibility - Siesta Key, FL

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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