July weather forecastDuncan, SC
July
Weather in July
July, like June, is another tropical summer month in Duncan, South Carolina, with an average temperature varying between 69.1°F (20.6°C) and 91°F (32.8°C).Temperature
The warmest period tends to be July, when average temperatures fluctuate between a high of 91°F (32.8°C) and a low of 69.1°F (20.6°C).Heat index
The heat index value for July is evaluated at a blisteringly hot 107.6°F (42°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
With an average relative humidity of 67%, July is the least humid month.Rainfall
In Duncan, in July, during 15.3 rainfall days, 2.13" (54mm) 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 Duncan, the average length of the day in July is 14h and 14min.On the first day of the month, sunrise is at 6:18 am and sunset at 8:46 pm. On the last day of July, sunrise is at 6:37 am and sunset at 8:31 pm EDT.
Sunshine
With an average of 10.9h of sunshine, July has the most sunshine of the year.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 6 in July translates into the following instructions:
Prevent overexposure. Protection from the sun's harmful effects is needed. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Duncan, SC
- Average high temperature in July: 91°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 July: 69.1°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 July
Duncan, SC
- Average pressure in July: 30.01"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 July
Duncan, SC
- Average wind speed in July: 4.6mph
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 July
Duncan, SC
- Average humidity in July: 67%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (67%).
Average rainfall in July
Duncan, SC
- Average rainfall in July: 2.13"
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 July
Duncan, SC
- Average rainfall days in July: 15.3 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 July
Duncan, SC
- Average snowfall in July: 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 July
Duncan, SC
- Average snowfall days in July: 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 July /
Average sunshine in July
Duncan, SC
- Average daylight in July: 14h and 12min
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 July: 10h 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 July
Duncan, SC
- Average sunshine days in July: 13.5 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 July
Duncan, SC
- Average UV index in July: 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 July
Duncan, SC
- Average cloud cover in July: 28
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 July
Duncan, SC
- Average visibility in July: 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).
