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September Weather in Saint George, United States

Last updated: June 24, 2025

In September, the average temperature in Saint George, United States hovers around 27°C (82°F). Expect lows of 23°C (74°F) and highs reaching 32°C (89°F). This month brings about 135 mm (5.3 in) of precipitation spread across 18 days, contributing to an average humidity of 78%. Whether you're planning outdoor activities or cozy indoor retreats, the weather this month promises to be quite eventful!

September Temperature in Saint George

In September in Saint George, the average temperature is 27°C (82°F). Maximums can reach 32°C (89°F) and minimums can be as low as 23°C (74°F). This pleasant climate makes it an ideal time for travelers to enjoy outdoor activities and explore the local attractions.

September Weather in Saint George: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint George, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint George, September typically has an average temperature of 27°C (82°F), with highs reaching up to 32°C (89°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec616568727781828281787065
Data source: Temperature data for Saint George 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 Saint George

In Saint George in September, the total precipitation amount is 135 mm (5.3 in) spread over 18 days.

September Precipitation Trends in Saint George

The chart displays monthly precipitation patterns in Saint George, 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 Saint George, September typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec43572066103159210221135714771
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint George

In Saint George in September humidity is 78%. With an average temperature of 27°C (82°F), this humidity feels like a warm blanket enveloping you, making outdoor activities a sweaty affair and requiring frequent breaks for hydration.

September Average Humidity in Saint George

This chart illustrates the average monthly humidity levels in Saint George, 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 Saint George is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%79%78%76%75%74%75%78%80%82%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint George

In Saint George in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Saint George.

Maximum UV Index Levels in Saint George for September

The chart shows the monthly maximum UV Index (UVI) for Saint George 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 Saint George typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec689111112121111975
Data source: Saint George 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 Saint George Compares to Other Months

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

This table compares monthly weather conditions in Saint George, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)43 mm (1.7 inches)82%high
February Weather18°C (65°F)57 mm (2.2 inches)82%very high
March Weather20°C (68°F)20 mm (0.8 inches)79%very high
April Weather22°C (73°F)66 mm (2.6 inches)78%extreme
May Weather25°C (77°F)103 mm (4.0 inches)76%extreme
June Weather27°C (81°F)159 mm (6.3 inches)75%extreme
July Weather28°C (82°F)210 mm (8.3 inches)74%extreme
August Weather28°C (83°F)221 mm (8.7 inches)74%extreme
September Weather27°C (82°F)135 mm (5.3 inches)78%extreme
October Weather26°C (78°F)71 mm (2.8 inches)79%very high
November Weather21°C (70°F)46 mm (1.8 inches)82%high
December Weather18°C (65°F)70 mm (2.8 inches)84%moderate

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