June weather forecast
Simpsonville, SC

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Weather in June

June in Simpsonville, South Carolina marks the official start of summer with the highest daylight hours of the whole year, around 14.5. Compared to May, the temperature further increases, prompting people to beat the heat at swimming pools and water parks. Despite the ascending temperatures, June is also characterized by its moderate humidity levels, preventing the weather from becoming too oppressive. This month is all about enjoying the longest days of the year under clear blue skies. Outdoor activities and water sports are at their peak during June.

Temperature

As Simpsonville transitions into June, a marginal rise in the average high-temperature is observed, moving from a warm 79.3°F (26.3°C) in May to a tropical 87.6°F (30.9°C). Simpsonville undergoes a major shift from daytime highs, averaging an enjoyable 65.8°F (18.8°C) during the night in June.

Heat index

The heat index value for June is calculated to be a sweltering 100.4°F (38°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In June, the average relative humidity in Simpsonville is 71%.

Rainfall

In June, the rain falls for 15.8 days. Throughout June, 2.68" (68mm) of precipitation is accumulated. In Simpsonville, during the entire year, the rain falls for 163.9 days and collects up to 35.51" (902mm) of precipitation.

Snowfall

April through October are months without snowfall.

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 Simpsonville, sunrise is at 6:16 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:46 pm EDT.

Sunshine

In June, the average sunshine is 10.9h.

UV index

The months with the highest UV index in Simpsonville are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A daily high UV index of 6 in June leads to these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in June?

June temperatures vary between a high-temperature of 87.6°F (30.9°C) and a low-temperature of 65.8°F (18.8°C). In June, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is calculated to be 100.4°F (38°C).

What is the average humidity in June in Simpsonville?

In Simpsonville, the average relative humidity in June is 71%.

How much does it rain in Simpsonville in June?

In Simpsonville, in June, during 15.8 rainfall days, 2.68" (68mm) of precipitation is typically accumulated.

When it does not snow?

In Simpsonville, snow does not fall in April through October.

When are the longest days?

June has the longest days of the year, with an average of 14h and 24min of daylight.

How many hours of daylight does Simpsonville have in June?

In Simpsonville, the average day length in June is 14h and 27min.

When is the sunrise / sunset in June in Simpsonville?

On the first day of June, sunrise is at 6:16 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 6:19 am and sunset at 8:46 pm EDT.

How long on average sun shines in June?

In Simpsonville, South Carolina, the average sunshine duration in June is 10.9h.

What are the months with the highest UV index?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index reading in June?

In June, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
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
Simpsonville, SC

Average temperature in June - Simpsonville, SC
  • Average high temperature in June: 87.6°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (49.6°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 (33.6°F).

Average pressure in June
Simpsonville, SC

Average pressure in June - Simpsonville, SC
  • Average pressure in June: 29.98"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in June
Simpsonville, SC

Average wind speed in June - Simpsonville, SC
  • Average wind speed in June: 5mph

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average humidity in June
Simpsonville, SC

Average humidity in June - Simpsonville, SC
  • Average humidity in June: 71%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).

Average rainfall in June
Simpsonville, SC

Average rainfall in June - Simpsonville, SC
  • Average rainfall in June: 2.68"

The wettest month (with the highest rainfall) is December (4.09").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days in June
Simpsonville, SC

Average rainfall days in June - Simpsonville, SC
  • Average rainfall days in June: 15.8 days

The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is October (9.6 days).

Average snowfall in June
Simpsonville, SC

Average snowfall in June - Simpsonville, SC
  • Average snowfall in June: 0"

The month with the highest snowfall is December (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in June
Simpsonville, SC

Average snowfall days in June - Simpsonville, SC
  • Average snowfall days in June: 0 days

The months with the highest number of snowfall days are January and February (1.4 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
Simpsonville, SC

Average daylight in June / Average sunshine in June - Simpsonville, 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 5min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

Average sunshine days in June
Simpsonville, SC

Average sunshine days in June - Simpsonville, SC
  • Average sunshine days in June: 12.3 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.7 days).

Average UV index in June
Simpsonville, SC

Average UV index in June - Simpsonville, SC
  • Average UV index in June: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).

Average cloud cover in June
Simpsonville, SC

Average cloud cover in June - Simpsonville, SC
  • Average cloud cover in June: 27

The months with the most cloud cover are February, March and December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in June
Simpsonville, SC

Average visibility in June - Simpsonville, 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).

Simpsonville, South Carolina, USA

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