March weather forecast
Key West, FL

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

The first month of the spring, March, is a moderately hot month in Key West, Florida, with temperature in the range of an average low of 70.5°F (21.4°C) and an average high of 73.9°F (23.3°C).

Temperature

In Key West, Florida, the average high-temperature in March is relatively the same as in February - a moderately hot 73.9°F (23.3°C). In Key West, in March, the average low-temperature is 70.5°F (21.4°C).

Humidity

In March, the average relative humidity is 75%.

Rainfall

The month with the least rainfall is March, when the rain falls for 11.7 days and typically collects 0.67" (17mm) of precipitation.

Ocean temperature

In Key West, the average seawater temperature in March is 73.2°F (22.9°C).
Note: 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).

Daylight

In Key West, the average length of the day in March is 12h and 2min.
On the first day of the month, sunrise is at 6:49 am and sunset at 6:29 pm EST. On the last day of March, in Key West, sunrise is at 7:19 am and sunset at 7:42 pm EDT.
Note: On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time lasts until Sunday, November 6. 2022, at 2:00 am; consequently, the time zone reverts from EDT to EST.

Sunshine

In March, the average sunshine is 8.9h.

UV index

In Key West, the average daily maximum UV index in March is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 6 in March transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the average humidity in March in Key West?

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

What is the driest month in Key West?

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

How many days does it rain in March in Key West?

In Key West, Florida, in March, it is raining for 11.7 days, with typically 0.67" (17mm) of accumulated precipitation.

How warm is the water in March in Key West?

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

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

On the first day of March in Key West, Florida, sunrise is at 6:49 am and sunset at 6:29 pm EST. On the last day of the month, sunrise is at 7:19 am and sunset at 7:42 pm EDT.

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

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

How high is the UV index in March in Key West?

In Key West, the average daily maximum UV index in March is 6. A UV Index reading of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.

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 2min

The month with the longest days is June (Average daylight: 13h and 38min).
The month with the shortest days is December (Average daylight: 10h and 39min).

  • Average sunshine in March: 8h and 54min

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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