May weather forecastDuncan, SC
May
Weather in May
The last month of the spring, May, is a moderately hot month in Duncan, South Carolina, with an average temperature varying between 58.8°F (14.9°C) and 79.5°F (26.4°C).Temperature
The shift from April to May introduces a subtle increase in the average high-temperature, moving from an agreeable 71.4°F (21.9°C) to a warm 79.5°F (26.4°C). Duncan temperatures generally rest at a low of 58.8°F (14.9°C) during the May nights.Humidity
In Duncan, the average relative humidity in May is 74%.Rainfall
In Duncan, in May, during 14.7 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. In Duncan, during the entire year, the rain falls for 141 days and collects up to 28.5" (724mm) of precipitation.Snowfall
In Duncan, snow does not fall in April through October.Daylight
In May, the average length of the day is 14h and 1min.On the first day of the month, sunrise is at 6:36 am and sunset at 8:14 pm. On the last day of May, sunrise is at 6:15 am and sunset at 8:36 pm EDT.
Sunshine
The average sunshine in May in Duncan is 9.9h.UV index
The months with the highest UV index in Duncan are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 6 in May interprets into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Duncan, SC
- Average high temperature in May: 79.5°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (48.9°F).
- Average low temperature in May: 58.8°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).
Average pressure in May
Duncan, 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 (29.99"Hg).
Average wind speed in May
Duncan, SC
- Average wind speed in May: 5.7mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in May
Duncan, SC
- Average humidity in May: 74%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (67%).
Average rainfall in May
Duncan, SC
- Average rainfall in May: 2.68"
The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in May
Duncan, SC
- Average rainfall days in May: 14.7 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in May
Duncan, SC
- Average snowfall in May: 0"
The month with the highest snowfall is December (2.2").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Duncan, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (1.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Duncan, SC
- Average daylight in May: 14h and 0min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in May: 9h and 54min
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 18min).
Average sunshine days in May
Duncan, SC
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is August (13.3 days).
Average UV index in May
Duncan, SC
- Average UV index in May: 6
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in May
Duncan, SC
- Average cloud cover in May: 35
The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are June and July (Cloud cover 28).
Average visibility in May
Duncan, 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).
