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September Weather in Lone Star, United States

Last updated: June 24, 2025

In September, the average temperature in Lone Star, United States hovers around 25°C (78°F), with a minimum of 10°C (51°F) and a potential maximum of 38°C (101°F). Expect about 88 mm (3.5 in) of precipitation over 6 days, contributing to an average humidity level of 65%.

September Temperature in Lone Star

In September in Lone Star, the average temperature is 25°C (78°F). Maximums can reach 38°C (101°F) and minimums can be as low as 10°C (51°F). This makes it an ideal time for travelers to enjoy both warm days and cool evenings while exploring all that Lone Star has to offer.

September Weather in Lone Star: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Lone Star, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lone Star, September typically has an average temperature of 25°C (78°F), with highs reaching up to 38°C (101°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec454758637280838378665450
Data source: Temperature data for Lone Star 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 Lone Star

In Lone Star in September, the precipitation amount is 88 mm (3.5 in) over the course of 6 days.

September Precipitation Trends in Lone Star

The chart displays monthly precipitation patterns in Lone Star, 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 Lone Star, September typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec891291321901971106796881366497
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lone Star

In Lone Star in September, humidity is 65%. With an average temperature of 25°C (78°F), this humidity feels like a warm, enveloping shawl that makes traveling slightly more strenuous, requiring frequent breaks to stay refreshed and hydrated.

September Average Humidity in Lone Star

This chart illustrates the average monthly humidity levels in Lone Star, 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 Lone Star is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lone Star

In Lone Star 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 Lone Star.

Maximum UV Index Levels in Lone Star for September

The chart shows the monthly maximum UV Index (UVI) for Lone Star 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 Lone Star typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Lone Star 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 Lone Star Compares to Other Months

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

This table compares monthly weather conditions in Lone Star, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)89 mm (3.5 inches)80%moderate
February Weather8°C (48°F)129 mm (5.1 inches)79%high
March Weather14°C (58°F)132 mm (5.2 inches)78%very high
April Weather17°C (63°F)190 mm (7.5 inches)78%very high
May Weather22°C (73°F)197 mm (7.8 inches)81%extreme
June Weather27°C (80°F)110 mm (4.3 inches)78%extreme
July Weather28°C (83°F)67 mm (2.6 inches)73%extreme
August Weather28°C (83°F)96 mm (3.8 inches)66%extreme
September Weather25°C (78°F)88 mm (3.5 inches)65%very high
October Weather19°C (66°F)136 mm (5.4 inches)72%very high
November Weather12°C (54°F)64 mm (2.5 inches)82%high
December Weather10°C (50°F)97 mm (3.8 inches)87%moderate

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