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 arrival coincides with a subtle temperature rise, moving from April's agreeable 73°F (22.8°C) to a warm 80.8°F (27.1°C). Joanna records an average nighttime low of 60.4°F (15.8°C) in May.Heat index
The heat index in May is appraised at 84.2°F (29°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.For clarity, heat index numbers account for light winds and areas under shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
In Joanna, the average relative humidity in May is 75%.Rainfall
In Joanna, in May, it is raining for 14.5 days, with typically 2.99" (76mm) of accumulated precipitation. Throughout the year, there are 150.3 rainfall days, and 31.85" (809mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in May is 13h and 58min.On the first day of the month, sunrise is at 6:36 am and sunset at 8:12 pm. On the last day of May, sunrise is at 6:15 am and sunset at 8:34 pm EDT.
Sunshine
In Joanna, South Carolina, the average sunshine in May is 9.6h.UV index
In Joanna, the average daily maximum UV index in May is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In May, the maximum UV index of 6 suggests these recommendations:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Joanna in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
How many hours of daylight does Joanna have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Joanna have in May?
How high is the UV index in May?
Average temperature in May
Joanna, SC
- Average high temperature in May: 80.8°F
The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (51.3°F).
- Average low temperature in May: 60.4°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).
Average pressure in May
Joanna, SC
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in May
Joanna, SC
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in May
Joanna, SC
- Average humidity in May: 75%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
Joanna, SC
- Average rainfall in May: 2.99"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in May
Joanna, SC
- Average rainfall days in May: 14.5 days
The month with the highest number of rainy days is August (16.5 days).
The months with the least rainy days are October and November (9 days).
Average snowfall in May
Joanna, SC
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Joanna, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in May /
Average sunshine in May
Joanna, SC
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 9h 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 12min).
Average sunshine days in May
Joanna, SC
- Average sunshine days in May: 14.1 days
The month with the most sunshine days is October (21.3 days).
The month with the least sunshine days is July (12 days).
Average UV index in May
Joanna, SC
- Average UV index in May: 6
The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in May
Joanna, SC
- Average cloud cover in May: 37
The months with the most cloud cover are February and December (Cloud cover 44).
The months with the least cloud cover are June, July and October (Cloud cover 31).
Average visibility in May
Joanna, SC
- 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).
Joanna, South Carolina, USA
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