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July Weather in Williston, United States

Last updated: June 24, 2025

In July, the average temperature in Williston, United States hovers around 21°C (71°F). Expect a minimum drop to 9°C (48°F), while the mercury can soar to a maximum of 34°C (94°F). With precipitation totaling 108 mm (4.2 in) over 13 days, be prepared for some wet weather. The air can feel quite humid, with an average humidity level of 76%.

July Temperature in Williston

In July in Williston, the average temperature is 21°C (71°F), with maximums reaching up to 34°C (94°F) and minimums dropping as low as 9°C (48°F). This range makes it an ideal time for travelers to experience a variety of outdoor activities, from sunny adventures to cooler evening strolls.

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

The chart illustrates July 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, July typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec202330435665716961503526
Data source: Temperature data for Williston generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

July Precipitation in Williston

In Williston in July, the precipitation amount is 108 mm (4.2 in), spread across 13 days.

July Precipitation Trends in Williston

The chart displays monthly precipitation patterns in Williston, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Williston, July typically receives around 108 mm (4.2 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8481771099197108877115211280
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in Williston

In Williston in July humidity is 76%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket, making traveling both refreshing and a bit exhausting, as the air clings to your skin and you often find yourself reaching for water to stay hydrated.

July Average Humidity in Williston

This chart illustrates the average monthly humidity levels in Williston, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Williston is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Williston

In Williston in July, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Williston.

Maximum UV Index Levels in Williston for July

The chart shows the monthly maximum UV Index (UVI) for Williston in July, 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 July, the maximum UV index in Williston typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Williston July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)84 mm (3.3 inches)93%low
February Weather-5°C (23°F)81 mm (3.2 inches)92%moderate
March Weather-1°C (30°F)77 mm (3.0 inches)86%moderate
April Weather6°C (43°F)109 mm (4.3 inches)85%very high
May Weather13°C (56°F)91 mm (3.6 inches)80%very high
June Weather18°C (65°F)97 mm (3.8 inches)74%very high
July Weather21°C (71°F)108 mm (4.2 inches)76%very high
August Weather20°C (69°F)87 mm (3.4 inches)75%very high
September Weather16°C (62°F)71 mm (2.8 inches)78%high
October Weather10°C (50°F)152 mm (6.0 inches)86%moderate
November Weather2°C (35°F)112 mm (4.4 inches)88%moderate
December Weather-3°C (26°F)80 mm (3.2 inches)89%low

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