Climate and monthly weather forecast
Dismal Key, FL

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Weather in January

January, the same as December, in Dismal Key, Florida, is an agreeable winter month, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 59.5°F (15.3°C). January is the month when Dismal Key, Florida, sees the lowest average temperatures, with a high of 71.6°F (22°C) and a low of 59.5°F (15.3°C). Weather in January »

Weather in February

February, the last month of the winter in Dismal Key, is a warm month, with an average temperature ranging between min 61.9°F (16.6°C) and max 73.6°F (23.1°C). February notes an average high-temperature of a moderately hot 73.6°F (23.1°C), subtly differing from January's 71.6°F (22°C). Weather in February »

Weather in March

The first month of the spring, March, is also a moderately hot month in Dismal Key, Florida, with an average temperature varying between 64°F (17.8°C) and 75.9°F (24.4°C). Dismal Key measures an average high-temperature of a still moderately hot 75.9°F (24.4°C) in March, nearly consistent with the preceding month. Weather in March »

Weather in April

April, like March, in Dismal Key, Florida, is a moderately hot spring month, with temperature in the range of an average low of 70.3°F (21.3°C) and an average high of 81°F (27.2°C). The advent of April signifies a minor shift to an average high-temperature of a still warm 81°F (27.2°C), aligning closely with March. Weather in April »

Weather in May

May, the last month of the spring in Dismal Key, is another warm month, with an average temperature fluctuating between 84.4°F (29.1°C) and 74.1°F (23.4°C). Dismal Key starts May with an average high-temperature of a still warm 84.4°F (29.1°C), hinting at a minimal fluctuation from April. Weather in May »

Weather in June

June, the first month of the summer in Dismal Key, is a tropical month, with an average temperature ranging between min 78.3°F (25.7°C) and max 86.5°F (30.3°C). May's transformation into June witnesses an average high-temperature of a hot 86.5°F (30.3°C), noting a minor change from the preceding month. Weather in June »

Weather in July

July, like June, is another tropical summer month in Dismal Key, Florida, with an average temperature fluctuating between 87.4°F (30.8°C) and 79.7°F (26.5°C). Transitioning into July, Dismal Key experiences an average high-temperature of a still tropical 87.4°F (30.8°C), marking a minor shift from the preceding month. Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Dismal Key, Florida, with an average temperature ranging between min 80.2°F (26.8°C) and max 88.3°F (31.3°C). August, with its average high-temperature of 88.3°F (31.3°C) and an average low-temperature of 80.2°F (26.8°C), holds the record as the warmest month. For most parts of August, the heat index is computed to be a blisteringly hot 104°F (40°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a hot month in Dismal Key, Florida, with temperature in the range of an average low of 78.4°F (25.8°C) and an average high of 87.1°F (30.6°C). September's average high-temperature stands at a still hot 87.1°F (30.6°C), showing little deviation from August's 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Dismal Key, Florida, with an average temperature varying between 74.1°F (23.4°C) and 83.5°F (28.6°C). The shift from September to October is characterized by an average high-temperature of a warm 83.5°F (28.6°C), not significantly different from the 87.1°F (30.6°C) of September. Weather in October »

Weather in November

November, the last month of the autumn in Dismal Key, is also a moderately hot month, with an average temperature varying between 67.8°F (19.9°C) and 78.4°F (25.8°C). Welcoming November, Dismal Key notes an average high-temperature of a still warm 78.4°F (25.8°C), nearly consistent with October's 83.5°F (28.6°C). Weather in November »

Weather in December

December, the first month of the winter in Dismal Key, is also a moderately hot month, with an average temperature varying between 74.8°F (23.8°C) and 64.4°F (18°C). Dismal Key's December average high-temperature settles at a still moderately hot 74.8°F (23.8°C), showing a near match with the preceding month. Weather in December »
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

Dismal Key records the coldest temperatures in January, averaging a high of 71.6°F (22°C) and a low of 59.5°F (15.3°C).

How much does it rain?

Throughout the year, in Dismal Key, Florida, there are 162.1 rainfall days, and 21.69" (551mm) of precipitation is accumulated.

When is the lowest UV index?

The months with the lowest UV index are January and February, with an average maximum UV index of 5.

What is the least humid month in Dismal Key?

March is the least humid month in Dismal Key, with an average relative humidity of 72%.

What is the driest month?

March is the month with the least rainfall. Rain falls for 9.5 days and accumulates 0.63" (16mm) of precipitation.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What are the months with the most sunshine?

May and July, with an average of 11.1h of sunshine, are months with the most sunshine.

What are the months with the highest UV index?

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

When are the longest days?

With an average of 13h and 42min of daylight, June has the longest days of the year.

What month is the hottest?

With its average high temperature of 88.3°F (31.3°C) and a low of 80.2°F (26.8°C), August is regarded as the warmest month.

What is the rainiest month?

The month with the most rainfall is August, when the rain falls for 22.4 days and typically aggregates up to 4.29" (109mm) of precipitation.

What is the most humid month?

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

What is the month with the shortest days?

December has the shortest days of the year, with an average of 10h and 36min of daylight.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 6.7h of sunshine.

Average temperature
Dismal Key, FL

Average temperature - Dismal Key, FL

The warmest month (with the highest average high temperature) is August (88.3°F).
The month with the lowest average high temperature is January (71.6°F).

The month with the highest average low temperature is August (80.2°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

Average pressure
Dismal Key, FL

Average pressure - Dismal Key, FL

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.94"Hg).

Average wind speed
Dismal Key, FL

Average wind speed - Dismal Key, FL

The windiest month (with the highest average wind speed) is November (9.2mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).

Average humidity
Dismal Key, FL

Average humidity - Dismal Key, FL

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (72%).

Average rainfall
Dismal Key, FL

Average rainfall - Dismal Key, FL

The wettest month (with the highest rainfall) is August (4.29").
The driest month (with the least rainfall) is March (0.63").

Average rainfall days
Dismal Key, FL

Average rainfall days - Dismal Key, FL

The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (7 days).

Average daylight / Average sunshine
Dismal Key, FL

Average daylight / Average sunshine - Dismal Key, FL

The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).

The months with the most sunshine are May and July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days
Dismal Key, FL

Average sunshine days - Dismal Key, FL

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is August (6.8 days).

Average UV index
Dismal Key, FL

Average UV index - Dismal Key, FL

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

Average visibility
Dismal Key, FL

Average visibility - Dismal 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).

Dismal Key, Florida, USA

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