May weather forecastDuck Key, FL
May
Weather in May
The last month of the spring, May, is another warm month in Duck Key, Florida, with an average temperature ranging between max 80.4°F (26.9°C) and min 77.7°F (25.4°C).Temperature
Duck Key observes an average high-temperature of a still warm 80.4°F (26.9°C) in May, barely different from 77.4°F (25.2°C) in April. May nighttime temperatures hover close to the daytime peak with an average of 77.7°F (25.4°C).Humidity
In Duck Key, the average relative humidity in May is 76%.Rainfall
In May, the rain falls for 15.4 days. Throughout May, 2.48" (63mm) of precipitation is accumulated. Throughout the year, there are 186.2 rainfall days, and 24.45" (621mm) of precipitation is accumulated.Ocean temperature
In Duck Key, Florida, the average seawater temperature in May is 81.1°F (27.3°C).Note: Swimming, diving, and other water activities in the temperature range of 77°F (25°C) to 84.2°F (29°C) are perceived as very enjoyable and comfortable for prolonged durations.
Daylight
In Duck Key, the average length of the day in May is 13h and 21min.On the first day of May, sunrise is at 6:47 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 8:08 pm EDT.
Sunshine
In Duck Key, the average sunshine in May is 10.9h.UV index
April through October, 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 hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 7 in May translates into these instructions:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Be wary! Reflections from sand and water make UV radiation more intense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Duck Key, FL
- Average high temperature in May: 80.4°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 (72.9°F).
- Average low temperature in May: 77.7°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 (67.5°F).
Average pressure in May
Duck Key, FL
- Average pressure in May: 29.99"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).
Average wind speed in May
Duck Key, FL
- Average wind speed in May: 11.8mph
The windiest month (with the highest average wind speed) is January (13.4mph).
The calmest month (with the lowest average wind speed) is July (9mph).
Average humidity in May
Duck Key, FL
- Average humidity in May: 76%
The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is March (73%).
Average rainfall in May
Duck Key, FL
- Average rainfall in May: 2.48"
The wettest month (with the highest rainfall) is September (4.21").
The driest month (with the least rainfall) is March (0.43").
Average rainfall days in May
Duck Key, FL
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is September (23 days).
The month with the least rainy days is February (10.3 days).
Average sea temperature in May
Duck Key, FL
- Average sea temperature in May: 81.1°F
The best month for swimming (with the highest average sea temperature) is August (86.6°F).
The coldest months (with the lowest average sea temperature) are January and February (73.9°F).
Average daylight in May /
Average sunshine in May
Duck Key, FL
- Average daylight in May: 13h and 24min
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: 10h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in May
Duck Key, FL
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is March (18 days).
The month with the least sunshine days is September (4.6 days).
Average UV index in May
Duck Key, FL
- Average UV index in May: 7
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).
Average cloud cover in May
Duck Key, FL
- Average cloud cover in May: 26
The months with the most cloud cover are January and October (Cloud cover 32).
The month with the least cloud cover is April (Cloud cover 23).
Average visibility in May
Duck 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).
