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September Weather in Highlands, United States

Last updated: June 24, 2025

In September, the average temperature in Highlands, United States reaches a warm 27°C (80°F). Expect some variability, with minimums dipping to 13°C (56°F) and maximums soaring to 37°C (99°F). This month is also characterized by 219 mm (8.6 in) of precipitation, spread over 17 days, contributing to an average humidity level of 73%.

September Temperature in Highlands

In September in Highlands, the average temperature is 27°C (80°F), with maximums reaching 37°C (99°F) and minimums dropping as low as 13°C (56°F). This range makes it an ideal destination for travelers seeking warm weather while also offering pleasant cool evenings.

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

The chart illustrates September temperature patterns in Highlands, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In 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 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec545865707781838380726258
Data source: Temperature data for Highlands 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.

September Precipitation in Highlands

In Highlands, in September, the precipitation amount is 219 mm (8.6 in) over a span of 17 days.

September Precipitation Trends in Highlands

The chart displays monthly precipitation patterns in 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 Highlands, September typically receives around 219 mm (8.6 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec86988710818017415522721911884112
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Highlands

In Highlands in September humidity is 73%. With an average temperature of 27°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling feel sticky and slightly uncomfortable, prompting frequent breaks in the shade and plenty of hydration.

September Average Humidity in Highlands

This chart illustrates the average monthly humidity levels in 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 Highlands is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%81%76%79%79%74%72%68%73%75%78%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Highlands

In 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 Highlands.

Maximum UV Index Levels in Highlands for September

The chart shows the monthly maximum UV Index (UVI) for 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 Highlands typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110975
Data source: 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 Highlands Compares to Other Months

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

This table compares monthly weather conditions in Highlands, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (55°F)86 mm (3.4 inches)78%moderate
February Weather14°C (58°F)98 mm (3.8 inches)81%very high
March Weather19°C (66°F)87 mm (3.4 inches)76%very high
April Weather21°C (70°F)108 mm (4.3 inches)79%extreme
May Weather25°C (77°F)179 mm (7.1 inches)79%extreme
June Weather27°C (82°F)174 mm (6.9 inches)74%extreme
July Weather28°C (83°F)155 mm (6.1 inches)71%extreme
August Weather28°C (83°F)227 mm (8.9 inches)68%extreme
September Weather27°C (80°F)219 mm (8.6 inches)73%very high
October Weather22°C (73°F)118 mm (4.7 inches)75%very high
November Weather17°C (62°F)84 mm (3.3 inches)78%high
December Weather14°C (58°F)112 mm (4.4 inches)84%moderate

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