March weather forecast
Key Largo, FL

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A clear seascape and cloudy evening sky in Key Largo, Florida
A clear seascape and cloudy evening sky in Key Largo, Florida

Weather in March

March, the first month of the spring in Key Largo, is still a warm month, with an average temperature varying between 74.5°F (23.6°C) and 70.2°F (21.2°C).

Temperature

Upon the beginning of March, Key Largo's high-temperatures register at a still warm 74.5°F (23.6°C), closely mirroring the preceding month. A steady low-temperature average of 70.2°F (21.2°C) is logged during March, reflecting a modest dip from daytime readings.

Humidity

The least humid month is March, with an average relative humidity of 73%.

Rainfall

March is the month with the least rainfall. Rain falls for 11.4 days and accumulates 0.59" (15mm) of precipitation.

Ocean temperature

In Key Largo, the average seawater temperature in March is 75.9°F (24.4°C).
Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 75.9°F (24.4°C) waters might be just right. Remember, Olympic swimmers are used to waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

The average length of the day in March in Key Largo is 12h and 2min.
On the first day of March, sunrise is at 6:43 am and sunset at 6:24 pm EST. On the last day of the month, sunrise is at 7:13 am and sunset at 7:38 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 Key Largo, the average sunshine in March is 8.7h.

UV index

In March, the average daily maximum UV index in Key Largo is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: In March, the maximum UV index of 6 suggests this advice:
Shun overexposure. Protection from sun ravages is indispensable. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Warning! The reflection of sand and water increases the UV dose.
Resources | Updated: Feb 10, 2024 | Published by: Weather U.S.

Frequently asked questions

What is the average March temperature in Key Largo?

In March, in Key Largo, the average high-temperature is 74.5°F (23.6°C), and the average low-temperature is 70.2°F (21.2°C).

What is the least humid month in Key Largo?

With an average relative humidity of 73%, March is the least humid month in Key Largo.

What is the average humidity in March in Key Largo?

In Key Largo, Florida, the average relative humidity in March is 73%.

What is the driest month in Key Largo?

The month with the least rainfall is March, when the rain falls for 11.4 days and typically collects 0.59" (15mm) of precipitation.

How much does it rain in Key Largo in March?

In Key Largo, in March, it is raining for 11.4 days, with typically 0.59" (15mm) of accumulated precipitation.

How warm is the water in March in Key Largo?

In March, the average ocean temperature is 75.9°F (24.4°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 75.9°F (24.4°C).

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

In March, the average day length is 12h and 2min.

When are sunrise and sunset in March in Key Largo?

In March, on the first day of the month, sunrise is at 6:43 am and sunset at 6:24 pm EST. On the last day of the month, in Key Largo, Florida, sunrise is at 7:13 am and sunset at 7:38 pm EDT.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Key Largo, 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 Largo have in March?

The average sunshine duration in March in Key Largo is 8.7h.

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

The average daily maximum UV index in March is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in March
Key Largo, FL

Average temperature in March - Key Largo, FL
  • Average high temperature in March: 74.5°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).

  • Average low temperature in March: 70.2°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 (66.9°F).

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Average pressure in March
Key Largo, FL

Average pressure in March - Key Largo, FL
  • Average pressure in March: 30.08"Hg

The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).

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Average wind speed in March
Key Largo, FL

Average wind speed in March - Key Largo, FL
  • Average wind speed in March: 12.8mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).

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Average humidity in March
Key Largo, FL

Average humidity in March - Key Largo, FL
  • Average humidity in March: 73%

The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in March
Key Largo, FL

Average rainfall in March - Key Largo, FL
  • Average rainfall in March: 0.59"

The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").

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Average rainfall days in March
Key Largo, FL

Average rainfall days in March - Key Largo, FL
  • Average rainfall days in March: 11.4 days

The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).

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Average sea temperature in March
Key Largo, FL

Average sea temperature in March - Key Largo, FL
  • Average sea temperature in March: 75.8°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is February (74°F).

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

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

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).

  • Average sunshine in March: 8h and 4min

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 24min).

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Average sunshine days in March
Key Largo, FL

Average sunshine days in March - Key Largo, FL
  • Average sunshine days in March: 17.1 days

The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).

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Average UV index in March
Key Largo, FL

Average UV index in March - Key Largo, 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 Largo, FL

Average cloud cover in March - Key Largo, FL
  • Average cloud cover in March: 27

The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).

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Average visibility in March
Key Largo, FL

Average visibility in March - Key Largo, 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 Largo, Florida, USA

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