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September Weather in Killen, United States

Last updated: June 24, 2025

In September, the average temperature in Killen, United States hovers around 24°C (76°F). Expect to experience temperature ranges from a refreshing 11°C (52°F) to a scorching 36°C (98°F). During this month, precipitation amounts to 109 mm (4.3 in) over approximately 8 days, contributing to an average humidity level of 70%.

September Temperature in Killen

In September in Killen, the average temperature is 24°C (76°F). The maximum can reach 36°C (98°F), and the minimum can be as low as 11°C (52°F). This varied climate makes Killen an ideal destination for travelers seeking both warmth and cooler respite.

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

The chart illustrates September temperature patterns in Killen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killen, September typically has an average temperature of 24°C (76°F), with highs reaching up to 36°C (98°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec444856617177818076655148
Data source: Temperature data for Killen 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 Killen

In Killen in September, the total precipitation amount is 109 mm (4.3 in) spread over 8 days.

September Precipitation Trends in Killen

The chart displays monthly precipitation patterns in Killen, 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 Killen, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec11317816615311411710911110911069145
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Killen

In Killen in September, humidity is 70%. With an average temperature of 24°C (76°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel a bit sticky and heavier, so travelers should stay hydrated and take regular breaks to enjoy the sights comfortably.

September Average Humidity in Killen

This chart illustrates the average monthly humidity levels in Killen, 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 Killen is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%81%83%83%80%74%70%73%85%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Killen

In Killen in September, 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 Killen.

Maximum UV Index Levels in Killen for September

The chart shows the monthly maximum UV Index (UVI) for Killen 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 Killen typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109754
Data source: Killen 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 Killen Compares to Other Months

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

This table compares monthly weather conditions in Killen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)113 mm (4.5 inches)86%moderate
February Weather9°C (49°F)178 mm (7.0 inches)85%high
March Weather13°C (56°F)166 mm (6.5 inches)84%very high
April Weather16°C (62°F)153 mm (6.0 inches)81%very high
May Weather22°C (72°F)114 mm (4.5 inches)83%extreme
June Weather25°C (78°F)117 mm (4.6 inches)83%extreme
July Weather27°C (81°F)109 mm (4.3 inches)80%extreme
August Weather27°C (80°F)111 mm (4.4 inches)73%very high
September Weather24°C (76°F)109 mm (4.3 inches)70%very high
October Weather18°C (65°F)110 mm (4.3 inches)73%high
November Weather10°C (51°F)69 mm (2.7 inches)85%moderate
December Weather9°C (48°F)145 mm (5.7 inches)88%moderate

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