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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 22°C (73°F), offering a comfortable climate for outdoor activities. However, temperatures can vary significantly, with a minimum of 6°C (42°F) and a maximum soaring to 37°C (99°F). Expect some rain, with an average precipitation of 69 mm (2.7 in) spread over about 7 days. The humidity levels remain relatively high, averaging at 71%, adding a tropical touch to the atmosphere. Enjoy the diverse weather!

September Temperature in Saint George

In September in Saint George, the average temperature is 22°C (73°F). The maximum can reach 37°C (99°F), while the minimum can be as low as 6°C (42°F). This makes Saint George an ideal destination for diverse outdoor activities, so be sure to pack accordingly!

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 22°C (73°F), with highs reaching up to 37°C (99°F) and lows dropping to around 6°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec313246546578817772564437
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 precipitation amount is 69 mm (2.7 in) over the course of 7 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 69 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec32298869187868112169983428
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 71%. With an average temperature of 22°C (73°F), this humidity feels like a thick, warm blanket wrapping around you, making travel feel a bit sluggish but still pleasant as long as you stay hydrated and take breaks in the shade.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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 Weather-1°C (31°F)32 mm (1.3 inches)76%moderate
February Weather0°C (32°F)29 mm (1.1 inches)77%moderate
March Weather8°C (46°F)88 mm (3.5 inches)70%high
April Weather12°C (54°F)69 mm (2.7 inches)73%very high
May Weather19°C (66°F)187 mm (7.4 inches)82%very high
June Weather26°C (78°F)86 mm (3.4 inches)82%extreme
July Weather27°C (81°F)81 mm (3.2 inches)81%extreme
August Weather25°C (77°F)121 mm (4.7 inches)78%very high
September Weather22°C (73°F)69 mm (2.7 inches)71%very high
October Weather14°C (57°F)98 mm (3.8 inches)71%high
November Weather7°C (44°F)34 mm (1.3 inches)81%moderate
December Weather3°C (37°F)28 mm (1.1 inches)84%moderate

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