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September Weather in Logan, United States

Last updated: June 24, 2025

In September, the average temperature in Logan, United States hovers around 23°C (73°F). However, be prepared for a range of temperatures, with a minimum of 3°C (37°F) and a maximum reaching up to 38°C (100°F). Expect about 30 mm (1.2 in) of precipitation spread over 4 days, contributing to an average humidity level of 76%.

September Temperature in Logan

In September in Logan, the average temperature is 23°C (73°F). Maximums can reach 38°C (100°F), while minimums can drop to as low as 3°C (37°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates September temperature patterns in Logan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Logan, September typically has an average temperature of 23°C (73°F), with highs reaching up to 38°C (100°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec394252596978817973594941
Data source: Temperature data for Logan 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 Logan

In Logan in September, the precipitation amount is 30 mm (1.2 in) over the course of 4 days.

September Precipitation Trends in Logan

The chart displays monthly precipitation patterns in Logan, 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 Logan, September typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec14830333740264730521111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Logan

In Logan in September humidity is 76%. With an average temperature of 23°C (73°F), this humidity feels like a warm, enveloping blanket, making outdoor activities feel more intense and prompting travelers to seek shade or cool breaks more frequently.

September Average Humidity in Logan

This chart illustrates the average monthly humidity levels in Logan, 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 Logan is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%75%61%62%69%74%75%78%76%76%80%77%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Logan

In Logan in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Logan.

Maximum UV Index Levels in Logan for September

The chart shows the monthly maximum UV Index (UVI) for Logan 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 Logan typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121210854
Data source: Logan 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 Logan Compares to Other Months

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

This table compares monthly weather conditions in Logan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)14 mm (0.6 inches)74%moderate
February Weather6°C (43°F)8 mm (0.3 inches)75%high
March Weather11°C (52°F)30 mm (1.2 inches)61%very high
April Weather15°C (59°F)33 mm (1.3 inches)61%extreme
May Weather20°C (69°F)37 mm (1.5 inches)69%extreme
June Weather26°C (79°F)39 mm (1.6 inches)74%extreme
July Weather27°C (81°F)26 mm (1.0 inches)75%extreme
August Weather26°C (79°F)47 mm (1.8 inches)78%extreme
September Weather23°C (73°F)30 mm (1.2 inches)76%very high
October Weather15°C (59°F)51 mm (2.0 inches)76%very high
November Weather9°C (49°F)11 mm (0.4 inches)80%moderate
December Weather5°C (41°F)11 mm (0.4 inches)77%moderate

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