August Weather in Williston, United States

Last updated: June 24, 2025

The average temperature in Williston, United States during August is a pleasant 20°C (68°F). However, be prepared for a range: it can dip to a brisk 6°C (43°F) or soar to a scorching 39°C (102°F). Throughout the month, expect precipitation of about 44 mm (1.7 in) across approximately 7 days, contributing to an average humidity of 74%.

August Temperature in Williston

In August in Williston, the average temperature is 20°C (68°F). The maximum can reach 39°C (102°F), and the minimum can be as low as 6°C (43°F). Overall, travelers should be prepared for a wide range of temperatures and plan their activities accordingly.

August Weather in Williston: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Williston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williston, August typically has an average temperature of 20°C (68°F), with highs reaching up to 39°C (102°F) and lows dropping to around 6°C (43°F).

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

August Precipitation in Williston

In Williston in August, the precipitation amount is 44 mm (1.7 in) spread over a duration of 7 days.

August Precipitation Trends in Williston

The chart displays monthly precipitation patterns in Williston, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Williston, August typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

August Humidity in Williston

In Williston in August humidity is 74%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting, prompting travelers to seek shade and hydration more often.

August Average Humidity in Williston

This chart illustrates the average monthly humidity levels in Williston, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Williston is approximately 74%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Williston

In Williston in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Williston.

Maximum UV Index Levels in Williston for August

The chart shows the monthly maximum UV Index (UVI) for Williston in August, 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 August, the maximum UV index in Williston typically reaches 8, which falls under the very high exposure category.

Data source: Williston August 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 August Weather in Williston Compares to Other Months

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

This table compares monthly weather conditions in Williston, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	11 mm (0.4 inches)	89%	low
February Weather	-12°C (11°F)	18 mm (0.7 inches)	92%	moderate
March Weather	-2°C (28°F)	23 mm (0.9 inches)	84%	moderate
April Weather	3°C (38°F)	28 mm (1.1 inches)	74%	very high
May Weather	12°C (55°F)	45 mm (1.8 inches)	73%	very high
June Weather	19°C (66°F)	74 mm (2.9 inches)	69%	very high
July Weather	22°C (71°F)	58 mm (2.3 inches)	76%	very high
August Weather	20°C (68°F)	44 mm (1.7 inches)	74%	very high
September Weather	15°C (58°F)	59 mm (2.3 inches)	65%	high
October Weather	5°C (42°F)	30 mm (1.2 inches)	71%	moderate
November Weather	-2°C (29°F)	19 mm (0.7 inches)	84%	low
December Weather	-7°C (20°F)	19 mm (0.8 inches)	92%	low