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
As April transitions into May, a subtle temperature shift is observed, with average highs adjusting from 73.4°F (23°C) to a still warm 81°F (27.2°C). In May, Irmo records an average nighttime temperature of 62.6°F (17°C).Heat index
In May, the average heat index is evaluated at a tropical 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is achieved by amalgamating air temperature with the relative humidity readings. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
In May, the average relative humidity is 74%.Rainfall
In Irmo, in May, during 14.6 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. Throughout the year, there are 147.8 rainfall days, and 28.23" (717mm) of precipitation is accumulated.Snowfall
In Irmo, South Carolina, snow does not fall in April through November.Daylight
In May, the average length of the day is 13h and 57min.On the first day of the month, sunrise is at 6:34 am and sunset at 8:08 pm. On the last day of May, sunrise is at 6:14 am and sunset at 8:30 pm EDT.
Sunshine
In May, the average sunshine in Irmo is 10h.UV index
In Irmo, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In May, the maximum UV index of 6 suggests these recommendations:
Shun overexposure. Protection from sun ravages is indispensable. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in May?
What is the average humidity in May?
How much does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Irmo, SC
- Average high temperature in May: 81°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in May: 62.6°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in May
Irmo, SC
- Average pressure in May: 30.03"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in May
Irmo, SC
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in May
Irmo, SC
- Average humidity in May: 74%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (70%).
Average rainfall in May
Irmo, SC
- Average rainfall in May: 2.68"
The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in May
Irmo, SC
- Average rainfall days in May: 14.6 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is October (7.8 days).
Average snowfall in May
Irmo, SC
- Average snowfall in May: 0"
The month with the highest snowfall is February (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Irmo, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.5 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
Irmo, SC
- Average daylight in May: 13h and 5min
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: 10h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in May
Irmo, SC
- Average sunshine days in May: 14.7 days
The month with the most sunshine days is October (21.8 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in May
Irmo, SC
- Average UV index in May: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in May
Irmo, SC
- Average cloud cover in May: 33
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 28).
Average visibility in May
Irmo, 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).
Irmo, South Carolina, USA
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