May weather forecast
Dismal Key, FL

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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).

Temperature

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. Dismal Key, during the month of May, experiences an average low-temperature of 74.1°F (23.4°C).

Heat index

The average heat index in May is computed to be a hot 93.2°F (34°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
In the scope of the heat index, its values resonate with shade and light wind conditions. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

In May, the average relative humidity in Dismal Key is 73%.

Rainfall

In Dismal Key, in May, it is raining for 15.3 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 162.1 rainfall days, and 21.69" (551mm) of precipitation is accumulated.

Daylight

In May, the average length of the day is 13h and 25min.
On the first day of May, sunrise is at 6:48 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 8:13 pm EDT.

Sunshine

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

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A typical high UV index of 7 in May suggests the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in May?

The high-temperature during May is 84.4°F (29.1°C) and the low-temperature is 74.1°F (23.4°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in May is computed to be 93.2°F (34°C).

What is the average humidity in May?

The average relative humidity in May is 73%.

How much does it rain in Dismal Key in May?

In Dismal Key, in May, during 15.3 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

How many hours of daylight does Dismal Key have in May?

In May, the average day length is 13h and 25min.

When is the sunrise / sunset in May in Dismal Key?

In May, on the first day of the month, sunrise is at 6:48 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 8:13 pm EDT.

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.

How many hours of sunshine does Dismal Key have in May?

In Dismal Key, the average sunshine duration in May is 11.1h.

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.

What is the UV index reading in May?

In Dismal Key, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health risk 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 May
Dismal Key, FL

Average temperature in May - Dismal Key, FL
  • Average high temperature in May: 84.4°F

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).

  • Average low temperature in May: 74.1°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 in May
Dismal Key, FL

Average pressure in May - Dismal Key, FL
  • Average pressure in May: 30"Hg

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 in May
Dismal Key, FL

Average wind speed in May - Dismal Key, FL
  • Average wind speed in May: 7.8mph

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 in May
Dismal Key, FL

Average humidity in May - Dismal Key, FL
  • Average humidity in May: 73%

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

Average rainfall in May
Dismal Key, FL

Average rainfall in May - Dismal Key, FL
  • Average rainfall in May: 2.09"

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 in May
Dismal Key, FL

Average rainfall days in May - Dismal Key, FL
  • Average rainfall days in May: 15.3 days

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 in May /
Average sunshine in May
Dismal Key, FL

Average daylight in May / Average sunshine in May - Dismal Key, FL
  • Average daylight in May: 13h and 2min

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 May: 11h and 1min

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 in May
Dismal Key, FL

Average sunshine days in May - Dismal Key, FL
  • Average sunshine days in May: 12.9 days

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 in May
Dismal Key, FL

Average UV index in May - Dismal Key, FL
  • Average UV index in May: 7

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 cloud cover in May
Dismal Key, FL

Average cloud cover in May - Dismal Key, FL
  • Average cloud cover in May: 23

The month with the most cloud cover is January (Cloud cover 28).
The months with the least cloud cover are March and April (Cloud cover 22).

Average visibility in May
Dismal Key, FL

Average visibility in May - Dismal Key, FL
  • Average visibility in May: 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).

Dismal Key, Florida, USA

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