June weather forecast
Duncan, SC

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Weather in June

June, the first month of the summer in Duncan, is a tropical month, with an average temperature ranging between min 65.8°F (18.8°C) and max 88.3°F (31.3°C).

Temperature

June introduces a marginal temperature uplift, with average high-temperatures adjusting from May's warm 79.5°F (26.4°C) to a hot 88.3°F (31.3°C). Duncan receives a consistent average low-temperature of 65.8°F (18.8°C) in June, a substantial dip from the day's heat.

Heat index

Throughout June, the heat index is evaluated at a very hot 100.4°F (38°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The average relative humidity in June is 69%.

Rainfall

In Duncan, in June, it is raining for 13.7 days, with typically 2.17" (55mm) of accumulated precipitation. In Duncan, during the entire year, the rain falls for 141 days and collects up to 28.5" (724mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The month with the longest days is June, with an average of 14h and 30min of daylight.
On the first day of the month, sunrise is at 6:15 am and sunset at 8:37 pm. On the last day of June, in Duncan, sunrise is at 6:18 am and sunset at 8:46 pm EDT.

Sunshine

In Duncan, the average sunshine in June is 10.8h.

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 reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: A maximum daily UV index of 6 during June morphs into the following directions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in Duncan in June?

The high-temperature in Duncan during June is 88.3°F (31.3°C) and the low-temperature is 65.8°F (18.8°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines air temperature and relative humidity, in June is evaluated at 100.4°F (38°C).

What is the average humidity in June in Duncan?

In Duncan, the average relative humidity in June is 69%.

How many days does it rain in June in Duncan?

In June, in Duncan, South Carolina, the rain falls for 13.7 days. Throughout June, 2.17" (55mm) of precipitation is accumulated.

When it does not snow in Duncan?

In Duncan, South Carolina, snow does not fall in April through October.

When are the longest days in Duncan?

With an average of 14h and 30min of daylight, June has the longest days of the year in Duncan, South Carolina.

How many hours of daylight does Duncan have in June?

In June, the average day length in Duncan, South Carolina, is 14h and 28min.

When is the sunrise / sunset in June in Duncan?

On the first day of June in Duncan, sunrise is at 6:15 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 8:46 pm EDT.

How long on average sun shines in June in Duncan?

The average sunshine duration in June is 10.8h.

What is the month with the highest UV index in Duncan?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Duncan, South Carolina.

What is the UV index intensity in June in Duncan?

The average daily maximum UV index in June in Duncan, South Carolina, is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Duncan, SC

Average temperature in June - Duncan, SC
  • Average high temperature in June: 88.3°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 June: 65.8°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 June
Duncan, SC

Average pressure in June - Duncan, SC
  • Average pressure in June: 29.99"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 June
Duncan, SC

Average wind speed in June - Duncan, SC
  • Average wind speed in June: 4.9mph

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 June
Duncan, SC

Average humidity in June - Duncan, SC
  • Average humidity in June: 69%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (67%).

Average rainfall in June
Duncan, SC

Average rainfall in June - Duncan, SC
  • Average rainfall in June: 2.17"

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 June
Duncan, SC

Average rainfall days in June - Duncan, SC
  • Average rainfall days in June: 13.7 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 June
Duncan, SC

Average snowfall in June - Duncan, SC
  • Average snowfall in June: 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 June
Duncan, SC

Average snowfall days in June - Duncan, SC
  • Average snowfall days in June: 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 June /
Average sunshine in June
Duncan, SC

Average daylight in June / Average sunshine in June - Duncan, SC
  • Average daylight in June: 14h and 3min

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 June: 10h and 5min

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 June
Duncan, SC

Average sunshine days in June - Duncan, SC
  • Average sunshine days in June: 14.6 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 June
Duncan, SC

Average UV index in June - Duncan, SC
  • Average UV index in June: 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 June
Duncan, SC

Average cloud cover in June - Duncan, SC
  • Average cloud cover in June: 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 June
Duncan, SC

Average visibility in June - Duncan, SC
  • Average visibility in June: 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).

Duncan, South Carolina, USA

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