nomadseason

September Weather in Williston Highlands, United States

Last updated: June 24, 2025

In September, the average temperature in Williston Highlands, United States hovers around 27°C (80°F), making it a warm destination. You can expect a minimum of 18°C (64°F) and a peak of 37°C (99°F) during this time. Be prepared for some rain, as there’s an average precipitation of 138 mm (5.5 in) spread over 16 days. The atmosphere is also quite humid, with an average humidity level of 83%.

September Temperature in Williston Highlands

In September in Williston Highlands, the average temperature is 27°C (80°F). Maximum temperatures can reach 37°C (99°F), while the minimum can drop to as low as 18°C (64°F). This pleasant warmth makes Williston Highlands an ideal destination for travelers seeking a comfortable climate.

September Weather in Williston Highlands: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Williston Highlands, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williston Highlands, September typically has an average temperature of 27°C (80°F), with highs reaching up to 37°C (99°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec576466717780818180766560
Data source: Temperature data for Williston Highlands generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Williston Highlands

In Williston Highlands in September, the precipitation amount is 138 mm (5.5 in) spread over 16 days.

September Precipitation Trends in Williston Highlands

The chart displays monthly precipitation patterns in Williston Highlands, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Williston Highlands, September typically receives around 138 mm (5.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec49612883102175197197138825287
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Williston Highlands

In Williston Highlands in September, humidity is 83%. With an average temperature of 27°C (80°F), this humidity feels like a warm, steamy embrace, making traveling a bit uncomfortable as the air clings to your skin and renders even the slightest exertion more exhausting.

September Average Humidity in Williston Highlands

This chart illustrates the average monthly humidity levels in Williston Highlands, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Williston Highlands is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%78%77%75%76%79%78%83%81%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Williston Highlands

In Williston Highlands in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Williston Highlands.

Maximum UV Index Levels in Williston Highlands for September

The chart shows the monthly maximum UV Index (UVI) for Williston Highlands in September, 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 September, the maximum UV index in Williston Highlands typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112111110975
Data source: Williston Highlands September 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 September Weather in Williston Highlands Compares to Other Months

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

This table compares monthly weather conditions in Williston Highlands, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)49 mm (1.9 inches)83%moderate
February Weather18°C (64°F)61 mm (2.4 inches)82%very high
March Weather19°C (66°F)28 mm (1.1 inches)78%very high
April Weather22°C (71°F)83 mm (3.3 inches)77%extreme
May Weather25°C (77°F)102 mm (4.0 inches)75%extreme
June Weather27°C (80°F)175 mm (6.9 inches)76%extreme
July Weather27°C (81°F)197 mm (7.8 inches)79%extreme
August Weather27°C (82°F)197 mm (7.7 inches)78%extreme
September Weather27°C (80°F)138 mm (5.5 inches)83%very high
October Weather24°C (76°F)82 mm (3.2 inches)81%very high
November Weather18°C (65°F)52 mm (2.0 inches)83%high
December Weather16°C (61°F)87 mm (3.4 inches)86%moderate

Compare Williston Highlands's Climate with Cities Worldwide