Monthly weather forecast and climate
Duck Key, FL

The coldest month in Duck Key is January, with an average high-temperature of 75.2°F (24°C) and an average low-temperature of 57.2°F (14°C). In January, the rain falls for 6 days.
Weather in January »
The average high-temperature, in February, is 77°F (25°C), while the average low-temperature is 57.2°F (14°C). In Duck Key, during 6 rainfall days, 1.9" (48mm) of precipitation is typically accumulated.
Weather in February »
In Duck Key, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 60.8°F (16°C). In Duck Key, Florida, during 5 rainfall days, 2" (50mm) of precipitation is typically accumulated.
Weather in March »
The average high-temperature, in April, is 82.4°F (28°C), while the average low-temperature is 64.4°F (18°C). In Duck Key, it is raining for 4 days, with typically 2.4" (60mm) of accumulated precipitation.
Weather in April »
In Duck Key, the average high-temperature is 86°F (30°C), and the average low-temperature is 69.8°F (21°C). In May, the rain falls for 9 days.
Weather in May »
In Duck Key, the average high-temperature is 87.8°F (31°C), and the average low-temperature is 73.4°F (23°C). The month with the most rainfall is June when the rain falls for 13 days and typically aggregates up to 9.3" (236mm) of precipitation.
Weather in June »
July through September, with an average high-temperature of 89.6°F (32°C), are warmest months. In Duck Key, during July, the rain falls for 13 days and regularly aggregates up to 6.4" (162mm) of precipitation.
Weather in July »
July through September, with an average high-temperature of 89.6°F (32°C), are warmest months in Duck Key, Florida. In August, in Duck Key, the rain falls for 15 days.
Weather in August »
July through September, with an average high-temperature of 89.6°F (32°C), are warmest months. In Duck Key, in September, it is raining for 16 days, with typically 8.3" (210mm) of accumulated precipitation.
Weather in September »
The average high-temperature, is 86°F (30°C), while the average low-temperature is 69.8°F (21°C). In Duck Key, it is raining for 11 days, with typically 5.9" (150mm) of accumulated precipitation.
Weather in October »
The average high-temperature, in Duck Key, Florida, is 80.6°F (27°C), while the average low-temperature is 64.4°F (18°C). In Duck Key, Florida, during 7 rainfall days, 1.9" (49mm) of precipitation is typically accumulated.
Weather in November »
The average high-temperature, in Duck Key, is 77°F (25°C), while the average low-temperature is 59°F (15°C). December is the month with the least rainfall.
Weather in December »

What is the coldest month in Duck Key?

January is the coldest month in Duck Key, Florida, with an average high-temperature of 75.2°F (24°C) and an average low-temperature of 57.2°F (14°C).

How much does it rain in Duck Key?

Throughout the year, in Duck Key, there are 111 rainfall days, and 53.9" (1370mm) of precipitation is accumulated.

What are the months with the coldest ocean in Duck Key?

January and February, with an average ocean temperature of 73.9°F (23.3°C), are months with the coldest seawater. A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 73.9°F (23.3°C) water. (FYI: The Olympic swimming competition requires a water temperature between 77°F (25°C) and 82.4°F (28°C).)

When is the lowest UV index in Duck Key?

Months with the lowest UV index in Duck Key are January and December, with an average UV index of 6.

What is the month with the highest UV index in Duck Key?

April through August, with an average UV index of 11, are months with the highest UV index in Duck Key.

What month has the most sunshine in Duck Key?

With an average of 11h of sunshine, May has the most sunshine of the year in Duck Key.

What is the wettest month in Duck Key?

The month with the most rainfall in Duck Key is June when the rain falls for 13 days and typically aggregates up to 9.3" (236mm) of precipitation.

When are the longest days in Duck Key?

June has the longest days of the year in Duck Key, with an average of 13.7h of daylight.

What are the warmest months in Duck Key?

July through September, with an average high-temperature of 89.6°F (32°C), are warmest months in Duck Key, Florida.

What is the month with the warmest ocean in Duck Key?

The month with the warmest seawater is August, with an average ocean temperature of 86.5°F (30.3°C). For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

What is the driest month in Duck Key?

December is the month with the least rainfall. Rain falls for 6 days and accumulates 1.5" (37mm) of precipitation.

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

December has the shortest days of the year in Duck Key, Florida, with an average of 10.6h of daylight.

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

December has the least sunshine of the year in Duck Key, Florida, with an average of 7h of sunshine.
Average temperature - Duck Key, FL
Average rainfall - Duck Key, FL
Average rainfall days - Duck Key, FL
Average sea temperature - Duck Key, FL

The best month for swimming (with the highest average sea temperature) is August (86.6°F).
Coldest months (with the lowest average sea temperature) are January and February (73.9°F).

Average daylight / Average sunshine - Duck Key, FL
Average UV index - Duck Key, FL
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