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 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
The shift into May is accompanied by a modest temperature increase, with the average high-temperature edging up from a moderately hot 80.2°F (26.8°C) in April to a tropical 86.4°F (30.2°C). Throughout May, the average low-temperature records at a refreshing 65.8°F (18.8°C).Heat index
The average heat index in May is calculated to be a fiery hot 96.8°F (36°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
May is the least humid month, with an average relative humidity of 70%.Rainfall
In May, the rain falls for 13.6 days. Throughout May, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 173.6 rainfall days, and 31.3" (795mm) of precipitation is accumulated.Snowfall
In Alton, snow does not fall in January, March through December.Daylight
The average length of the day in May is 13h and 41min.On the first day of May, sunrise is at 6:48 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 8:28 pm EDT.
Sunshine
The average sunshine in May is 10.6h.UV index
May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 7 during May translates into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in May?
What is the least humid month?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow in Alton?
How many hours of daylight does Alton have in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Alton have in May?
What are the months with the highest UV index?
What is the UV index reading in May?
Average temperature in May
Alton, FL
- Average high temperature in May: 86.4°F
The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in May: 65.8°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in May
Alton, FL
- Average pressure in May: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in May
Alton, FL
- Average wind speed in May: 5.7mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in May
Alton, FL
- Average humidity in May: 70%
The months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is May (70%).
Average rainfall in May
Alton, FL
- Average rainfall in May: 2.4"
The wettest month (with the highest rainfall) is August (4.57").
The driest month (with the least rainfall) is November (1.14").
Average rainfall days in May
Alton, FL
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is August (25.5 days).
The month with the least rainy days is November (7.2 days).
Average snowfall days in May
Alton, FL
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Alton, FL
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in May
Alton, FL
- Average sunshine days in May: 16.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (4.3 days).
Average UV index in May
Alton, FL
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in May
Alton, FL
- Average cloud cover in May: 30
The month with the most cloud cover is December (Cloud cover 40).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in May
Alton, FL
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (6mi).
The month with the lowest visibility is September (5mi).
Alton, Florida, USA
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