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September Weather in Highland, United States

Last updated: June 24, 2025

In Highland, United States, the average temperature in September hovers around 19°C (66°F), with a minimum dipping to 3°C (38°F) and a maximum soaring up to 33°C (91°F). You can expect about 102 mm (4.0 in) of precipitation spread over 9 days, while the average humidity rests at a comfortable 68%.

September Temperature in Highland

In September in Highland, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as 3°C (38°F). This climate makes Highland an ideal destination for travelers seeking a mix of warm and cool experiences.

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

The chart illustrates September temperature patterns in Highland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Highland, September typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec303238496069757366564234
Data source: Temperature data for Highland 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 Highland

In Highland in September, the total precipitation amount is 102 mm (4.0 in) over a span of 9 days.

September Precipitation Trends in Highland

The chart displays monthly precipitation patterns in Highland, 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 Highland, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7194881281158711811310214091102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Highland

In Highland in September humidity is 68%. With an average temperature of 19°C (66°F), this humidity feels like a warm embrace, creating a sticky atmosphere that can be a bit uncomfortable for traveling.

September Average Humidity in Highland

This chart illustrates the average monthly humidity levels in Highland, 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 Highland is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Highland

In Highland in September, 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 Highland.

Maximum UV Index Levels in Highland for September

The chart shows the monthly maximum UV Index (UVI) for Highland 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 Highland typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Highland 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 Highland Compares to Other Months

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

This table compares monthly weather conditions in Highland, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)71 mm (2.8 inches)84%moderate
February Weather0°C (33°F)94 mm (3.7 inches)82%moderate
March Weather3°C (38°F)88 mm (3.5 inches)81%high
April Weather10°C (49°F)128 mm (5.0 inches)78%very high
May Weather15°C (60°F)115 mm (4.5 inches)69%very high
June Weather20°C (69°F)87 mm (3.4 inches)69%very high
July Weather24°C (75°F)118 mm (4.6 inches)62%very high
August Weather23°C (73°F)113 mm (4.5 inches)65%very high
September Weather19°C (66°F)102 mm (4.0 inches)68%very high
October Weather13°C (56°F)140 mm (5.5 inches)74%high
November Weather5°C (42°F)91 mm (3.6 inches)82%moderate
December Weather1°C (34°F)102 mm (4.0 inches)80%low

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