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September Weather in Riner, United States

Last updated: June 24, 2025

In September, the average temperature in Riner, United States is a mild 20°C (67°F), making it a pleasant time to explore. However, temperatures can vary significantly, dipping to a minimum of 4°C (39°F) and soaring to a maximum of 32°C (90°F). Expect around 115 mm (4.5 in) of precipitation over 10 days, with an average humidity of 68%, contributing to a refreshing atmosphere.

September Temperature in Riner

In September in Riner, the average temperature is 20°C (67°F). Maximums can reach 32°C (90°F) and minimums can be as low as 4°C (39°F). This diverse range of temperatures makes it an ideal time for travelers to pack layers and enjoy a variety of outdoor activities.

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

The chart illustrates September temperature patterns in Riner, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riner, September typically has an average temperature of 20°C (67°F), with highs reaching up to 32°C (90°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec354146546369747267584440
Data source: Temperature data for Riner 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 Riner

In Riner in September, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

September Precipitation Trends in Riner

The chart displays monthly precipitation patterns in Riner, 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 Riner, September typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6911084115125105801151151046693
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Riner

In Riner in September humidity is 68%. With an average temperature of 20°C (67°F), this humidity feels like walking through a warm, heavy blanket, making travel a bit sweltering and causing you to crave frequent breaks in the shade.

September Average Humidity in Riner

This chart illustrates the average monthly humidity levels in Riner, 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 Riner is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Riner

In Riner 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 Riner.

Maximum UV Index Levels in Riner for September

The chart shows the monthly maximum UV Index (UVI) for Riner 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 Riner typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Riner 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 Riner Compares to Other Months

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

This table compares monthly weather conditions in Riner, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)69 mm (2.7 inches)87%moderate
February Weather5°C (41°F)110 mm (4.3 inches)87%high
March Weather8°C (46°F)84 mm (3.3 inches)86%very high
April Weather12°C (54°F)115 mm (4.5 inches)84%very high
May Weather17°C (63°F)125 mm (4.9 inches)83%extreme
June Weather21°C (70°F)105 mm (4.1 inches)83%extreme
July Weather23°C (74°F)80 mm (3.2 inches)79%extreme
August Weather22°C (72°F)115 mm (4.5 inches)66%very high
September Weather20°C (67°F)115 mm (4.5 inches)68%very high
October Weather14°C (58°F)104 mm (4.1 inches)78%high
November Weather7°C (44°F)66 mm (2.6 inches)89%moderate
December Weather4°C (40°F)93 mm (3.7 inches)86%moderate

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