March weather forecast
Key West, FL

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A beach pier in Key West, Florida, with palm trees in the background
A beach pier in Key West, Florida, with palm trees in the background

Weather in March

March signals the onset of warmer weather. Subtle shifts in weather patterns during this period characterize Key West's transition into its version of the spring season. The weather stability of February is disrupted in March, yet the trend towards occasional rainfall becomes more pronounced. Locals welcome this month as the commencement of warmer and longer days. On a standout note, with an increase in daylight hours to 12 hours, the days are becoming successively longer.

Temperature

March in Key West notes an average high-temperature of a warm 73.9°F (23.3°C), subtly differing from February's 73°F (22.8°C). March's average low temperature in Key West is an agreeable 70.5°F (21.4°C), displaying a subtle drop from its daily peak.

Humidity

The average relative humidity in March in Key West is 75%.

Rainfall

March is the month with the least rainfall in Key West. Rain falls for 11.7 days and accumulates 0.67" (17mm) of precipitation.

Ocean temperature

In Key West, the average seawater temperature in March is 73.2°F (22.9°C).
Note: The allure of a swim in 73.2°F (22.9°C) waters can be influenced by your feelings towards the cold, today's sunshine, the wind's touch, and the ambient warmth. To put it in perspective, Olympic standards demand water temperatures of 77°F (25°C) to 82.4°F (28°C).

Daylight

In March, the average length of the day in Key West is 12h and 2min.
On the first day of March, sunrise is at 6:48 am and sunset at 6:29 pm EST. On the last day of the month, sunrise is at 7:18 am and sunset at 7:43 pm EDT.
Note: 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 lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In March, the average sunshine in Key West is 8.9h.

UV index

The average daily maximum UV index in March in Key West is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In March, the maximum UV index of 6 suggests these recommendations:
Deflect overexposure. Sun protection is a necessity. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be alert! The reflection of water and sand augments UV radiation intensity.
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Frequently asked questions

What is the temperature in March in Key West?

During March, Key West experiences an average high-temperature of 73.9°F (23.3°C) and a low-temperature of 70.5°F (21.4°C).

What is the average humidity in March in Key West?

In Key West, the average relative humidity in March is 75%.

What is the driest month in Key West?

March is the month with the least rainfall. Rain falls for 11.7 days and accumulates 0.67" (17mm) of precipitation.

How much does it rain in Key West in March?

In Key West, during March, the rain falls for 11.7 days and regularly aggregates up to 0.67" (17mm) of precipitation.

How warm is the water in March in Key West?

In Key West, Florida, in March, the average water temperature is 73.2°F (22.9°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 73.2°F (22.9°C).

How many hours of daylight does Key West have in March?

In Key West, Florida, the average day length in March is 12h and 2min.

When is the sunrise / sunset in March in Key West?

In March, on the first day of the month, sunrise is at 6:48 am and sunset at 6:29 pm EST. On the last day of the month, sunrise is at 7:18 am and sunset at 7:43 pm EDT.

When does Daylight Saving Time (DST) start in March in Key West?

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

How many hours of sunshine does Key West have in March?

In Key West, Florida, the average sunshine duration in March is 8.9h.

What is the UV index reading in March in Key West?

The average daily maximum UV index in March is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in March
Key West, FL

Average temperature in March - Key West, FL
  • Average high temperature in March: 73.9°F

The warmest month (with the highest average high temperature) is August (85.3°F).
The month with the lowest average high temperature is January (72.7°F).

  • Average low temperature in March: 70.5°F

The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (68.5°F).

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Average pressure in March
Key West, FL

Average pressure in March - Key West, FL
  • Average pressure in March: 30.07"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are September and October (29.93"Hg).

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Average wind speed in March
Key West, FL

Average wind speed in March - Key West, FL
  • Average wind speed in March: 14mph

The windiest months (with the highest average wind speed) are January and November (14.4mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).

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Average humidity in March
Key West, FL

Average humidity in March - Key West, FL
  • Average humidity in March: 75%

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are July, August and September (74%).

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Average rainfall in March
Key West, FL

Average rainfall in March - Key West, FL
  • Average rainfall in March: 0.67"

The wettest month (with the highest rainfall) is September (5.12").
The driest month (with the least rainfall) is March (0.67").

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Average rainfall days in March
Key West, FL

Average rainfall days in March - Key West, FL
  • Average rainfall days in March: 11.7 days

The months with the highest number of rainy days are August and September (23.1 days).
The month with the least rainy days is February (11 days).

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Average sea temperature in March
Key West, FL

Average sea temperature in March - Key West, FL
  • Average sea temperature in March: 73.3°F

The best month for swimming (with the highest average sea temperature) is August (86.9°F).
The coldest months (with the lowest average sea temperature) are January and February (71.2°F).

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Average daylight in March /
Average sunshine in March
Key West, FL

Average daylight in March / Average sunshine in March - Key West, FL
  • Average daylight in March: 12h and 0min

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

  • Average sunshine in March: 8h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).

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Average sunshine days in March
Key West, FL

Average sunshine days in March - Key West, FL
  • Average sunshine days in March: 17 days

The month with the most sunshine days is March (17 days).
The month with the least sunshine days is September (4.5 days).

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Average UV index in March
Key West, FL

Average UV index in March - Key West, FL
  • Average UV index in March: 6

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

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Average cloud cover in March
Key West, FL

Average cloud cover in March - Key West, FL
  • Average cloud cover in March: 24

The month with the most cloud cover is January (Cloud cover 34).
The month with the least cloud cover is April (Cloud cover 23).

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Average visibility in March
Key West, FL

Average visibility in March - Key West, FL
  • Average visibility in March: 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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Key West, Florida, USA

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