June weather forecast
Sumter Junction, SC

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Weather in June

The first month of the summer, June, is a tropical month in Sumter Junction, South Carolina, with temperature in the range of an average low of 70°F (21.1°C) and an average high of 87.4°F (30.8°C).

Temperature

The arrival of June brings a soft temperature shift, with the average high-temperature nudging from a warm 80.2°F (26.8°C) in May to a hot 87.4°F (30.8°C). Sumter Junction's average low-temperature is measured at a pleasant 70°F (21.1°C) during June.

Heat index

In June, the heat index is estimated at a fiery hot 100.4°F (38°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. 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 quite important for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The average relative humidity in June in Sumter Junction, South Carolina, is 74%.

Rainfall

In Sumter Junction, during June, the rain falls for 17.1 days and regularly aggregates up to 3.11" (79mm) of precipitation. Throughout the year, in Sumter Junction, there are 161.8 rainfall days, and 33.35" (847mm) of precipitation is accumulated.

Snowfall

In Sumter Junction, snow does not fall in April through October.

Daylight

June has the longest days of the year, with an average of 14h and 24min of daylight.
On the first day of June in Sumter Junction, sunrise is at 6:12 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:37 pm EDT.

Sunshine

The average sunshine in June in Sumter Junction is 10.5h.

UV index

June and July, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In June, the UV index of 7 transforms into the following advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
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Frequently asked questions

How hot is it in Sumter Junction in June?

During June, Sumter Junction experiences an average high-temperature of 87.4°F (30.8°C) and a low-temperature of 70°F (21.1°C). In June, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 100.4°F (38°C).

What is the average humidity in June in Sumter Junction?

In June, the average relative humidity in Sumter Junction, South Carolina, is 74%.

How much does it rain in Sumter Junction in June?

In Sumter Junction, during June, the rain falls for 17.1 days and regularly aggregates up to 3.11" (79mm) of precipitation.

When it does not snow in Sumter Junction?

April through October are months without snowfall in Sumter Junction, South Carolina.

When are the longest days in Sumter Junction?

The month with the longest days is June, with an average of 14h and 24min of daylight.

How many hours of daylight does Sumter Junction have in June?

In June, the average day length in Sumter Junction, South Carolina, is 14h and 22min.

When is the sunrise / sunset in June in Sumter Junction?

On the first day of June in Sumter Junction, sunrise is at 6:12 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:37 pm EDT.

How many hours of sunshine does Sumter Junction have in June?

In Sumter Junction, the average sunshine duration in June is 10.5h.

What are the months with the highest UV index in Sumter Junction?

The months with the highest UV index in Sumter Junction, South Carolina, are June and July, with an average maximum UV index of 7.

How high is the UV index in June in Sumter Junction?

In June, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to 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
Sumter Junction, SC

Average temperature in June - Sumter Junction, SC
  • Average high temperature in June: 87.4°F

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in June: 70°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 (38.1°F).

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Average pressure in June
Sumter Junction, SC

Average pressure in June - Sumter Junction, SC
  • Average pressure in June: 29.97"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).

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Average wind speed in June
Sumter Junction, SC

Average wind speed in June - Sumter Junction, SC
  • Average wind speed in June: 6.3mph

The windiest months (with the highest average wind speed) are February and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in June
Sumter Junction, SC

Average humidity in June - Sumter Junction, SC
  • Average humidity in June: 74%

The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are January and November (70%).

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Average rainfall in June
Sumter Junction, SC

Average rainfall in June - Sumter Junction, SC
  • Average rainfall in June: 3.11"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is January (1.89").

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Average rainfall days in June
Sumter Junction, SC

Average rainfall days in June - Sumter Junction, SC
  • Average rainfall days in June: 17.1 days

The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is October (8.5 days).

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Average snowfall in June
Sumter Junction, SC

Average snowfall in June - Sumter Junction, SC
  • Average snowfall in June: 0"

The month with the highest snowfall is February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in June
Sumter Junction, SC

Average snowfall days in June - Sumter Junction, SC
  • Average snowfall days in June: 0 days

The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in June /
Average sunshine in June
Sumter Junction, SC

Average daylight in June / Average sunshine in June - Sumter Junction, SC
  • Average daylight in June: 14h and 2min

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 June: 10h and 3min

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 18min).

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Average sunshine days in June
Sumter Junction, SC

Average sunshine days in June - Sumter Junction, SC
  • Average sunshine days in June: 10.8 days

The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in June
Sumter Junction, SC

Average UV index in June - Sumter Junction, SC
  • Average UV index in June: 7

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in June
Sumter Junction, SC

Average cloud cover in June - Sumter Junction, SC
  • Average cloud cover in June: 30

The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 29).

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Average visibility in June
Sumter Junction, SC

Average visibility in June - Sumter Junction, 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).

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Sumter Junction, South Carolina, USA

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