June Weather in Sumter, United States

Last updated: June 24, 2025

In Sumter, United States, the average temperature in June is a warm 26°C (79°F). Expect a range from a cool 13°C (55°F) at night to a scorching 39°C (103°F) during the day. With an average precipitation of 122 mm (4.8 in) spread over 15 days, keep an umbrella handy! The humidity hovers around 75%, adding to the tropical feel of the month.

June Temperature in Sumter

In June in Sumter, the average temperature is 26°C (79°F). Maximums can reach 39°C (103°F), while minimums can dip as low as 13°C (55°F). This diverse temperature range makes Sumter an ideal destination for travelers seeking both warmth and cool respite.

June Weather in Sumter: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Sumter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sumter, June typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (103°F) and lows dropping to around 13°C (55°F).

Data source: Temperature data for Sumter generated using information from the Copernicus Climate Change Service.

June Precipitation in Sumter

In Sumter in June, the precipitation amount is 122 mm (4.8 in) over a span of 15 days.

June Precipitation Trends in Sumter

The chart displays monthly precipitation patterns in Sumter, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Sumter, June typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

June Humidity in Sumter

In Sumter in June, humidity is 75%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making traveling a sticky experience where every step requires extra effort and frequent breaks to cool off.

June Average Humidity in Sumter

This chart illustrates the average monthly humidity levels in Sumter, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Sumter is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Sumter

In Sumter in June, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Sumter.

Maximum UV Index Levels in Sumter for June

The chart shows the monthly maximum UV Index (UVI) for Sumter in June, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In June, the maximum UV index in Sumter typically reaches 11, which falls under the extreme exposure category.

Data source: Sumter June UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How June Weather in Sumter Compares to Other Months

Weather in Sumter varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in Sumter, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Sumter, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	78 mm (3.1 inches)	86%	moderate
February Weather	12°C (54°F)	95 mm (3.7 inches)	81%	high
March Weather	14°C (58°F)	70 mm (2.8 inches)	81%	very high
April Weather	18°C (65°F)	102 mm (4.0 inches)	79%	very high
May Weather	23°C (74°F)	97 mm (3.8 inches)	75%	extreme
June Weather	26°C (79°F)	122 mm (4.8 inches)	75%	extreme
July Weather	28°C (82°F)	144 mm (5.7 inches)	80%	extreme
August Weather	27°C (81°F)	128 mm (5.0 inches)	81%	very high
September Weather	25°C (78°F)	136 mm (5.4 inches)	83%	very high
October Weather	21°C (69°F)	56 mm (2.2 inches)	78%	very high
November Weather	13°C (55°F)	67 mm (2.6 inches)	85%	high
December Weather	10°C (51°F)	141 mm (5.5 inches)	87%	moderate