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September Weather in Runnells, United States

Last updated: June 24, 2025

In Runnells, United States, the average temperature in September hovers around 20°C (69°F). Expect a minimum of 5°C (42°F) and a maximum of 33°C (92°F) throughout the month. It’s also a time of moderate precipitation, with an average of 119 mm (4.7 in) spread over 9 days. The average humidity sits at a comfortable 73%, making it a pleasantly warm period to experience this destination.

September Temperature in Runnells

In September in Runnells, the average temperature is 20°C (69°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 5°C (42°F). Overall, it's a great time for travelers to enjoy a mix of warm days and cooler evenings in Runnells.

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

The chart illustrates September temperature patterns in Runnells, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Runnells, September typically has an average temperature of 20°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec222440506374777469533931
Data source: Temperature data for Runnells 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 Runnells

In Runnells in September, the precipitation amount is 119 mm (4.7 in) occurring over a span of 9 days.

September Precipitation Trends in Runnells

The chart displays monthly precipitation patterns in Runnells, 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 Runnells, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec4143837316012671701191364537
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Runnells

In Runnells in September humidity is 73%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making travel slightly sticky but ultimately comfortable as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Runnells

This chart illustrates the average monthly humidity levels in Runnells, 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 Runnells is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Runnells

In Runnells 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 Runnells.

Maximum UV Index Levels in Runnells for September

The chart shows the monthly maximum UV Index (UVI) for Runnells 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 Runnells typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Runnells 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 Runnells Compares to Other Months

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

This table compares monthly weather conditions in Runnells, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)41 mm (1.6 inches)78%moderate
February Weather-4°C (24°F)43 mm (1.7 inches)80%moderate
March Weather4°C (40°F)83 mm (3.3 inches)77%high
April Weather10°C (50°F)73 mm (2.9 inches)77%very high
May Weather17°C (63°F)160 mm (6.3 inches)77%very high
June Weather24°C (75°F)126 mm (4.9 inches)81%extreme
July Weather25°C (77°F)71 mm (2.8 inches)81%very high
August Weather23°C (74°F)69 mm (2.7 inches)77%very high
September Weather20°C (69°F)119 mm (4.7 inches)73%very high
October Weather12°C (53°F)136 mm (5.4 inches)75%high
November Weather4°C (39°F)45 mm (1.8 inches)85%moderate
December Weather0°C (31°F)37 mm (1.5 inches)83%moderate

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