Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's onset records an average high-temperature of a still warm 85.6°F (29.8°C), a near match to April's 81.5°F (27.5°C). In May, Heathrow experiences a temperature dip to an average of 69.1°F (20.6°C) at night.Heat index
Throughout May, the heat index is computed to be a torrid 95°F (35°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Consider that heat index readings are for situations in the shade and light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', melds the effects of warmth and moisture to generate a feeling of heat. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In Heathrow, the average relative humidity in May is 73%.Rainfall
In May, the rain falls for 16.1 days. Throughout May, 2.87" (73mm) of precipitation is accumulated. Throughout the year, there are 185.5 rainfall days, and 30.43" (773mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In May, the average length of the day is 13h and 35min.On the first day of May, sunrise is at 6:43 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 8:18 pm EDT.
Sunshine
In Heathrow, the average sunshine in May is 10.7h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In May, the maximum UV index of 7 suggests this advice:
Ward off overexposure. Defence against solar harm is crucial. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in May?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
How many hours of daylight does Heathrow have in May?
What time are sunrise and sunset in May?
How long on average sun shines in May?
What are the months with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Heathrow, FL
- Average high temperature in May: 85.6°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (67.8°F).
- Average low temperature in May: 69.1°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (52°F).
Average pressure in May
Heathrow, FL
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in May
Heathrow, FL
- Average wind speed in May: 6.1mph
The windiest months (with the highest average wind speed) are January, March and April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in May
Heathrow, FL
- Average humidity in May: 73%
The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in May
Heathrow, FL
- Average rainfall in May: 2.87"
The wettest month (with the highest rainfall) is August (4.72").
The driest month (with the least rainfall) is March (1.18").
Average rainfall days in May
Heathrow, FL
- Average rainfall days in May: 16.1 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is January (10.1 days).
Average snowfall in May
Heathrow, FL
- Average snowfall in May: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in May
Heathrow, FL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Heathrow, FL
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 12min).
Average sunshine days in May
Heathrow, FL
- Average sunshine days in May: 12.5 days
The month with the most sunshine days is January (17.4 days).
The month with the least sunshine days is August (4.3 days).
Average UV index in May
Heathrow, 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 month with the lowest UV index is January (UV index 4).
Average cloud cover in May
Heathrow, FL
- Average cloud cover in May: 27
The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in May
Heathrow, 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).
Heathrow, Florida, USA
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