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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 15°C (59°F). Visitors can expect a range in temperature, from a chilly -2°C (29°F) at night to a warm 32°C (91°F) during the day. With an average precipitation of 35 mm (1.4 in) spread over 5 days, and humidity levels at 46%, it's a month that balances warmth and moisture.

September Temperature in Logan

In September in Logan, the average temperature is 15°C (59°F), with maximums reaching 32°C (91°F) and minimums dropping as low as -2°C (29°F). It's important to pack for a range of weather conditions to ensure a comfortable travel experience.

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 15°C (59°F), with highs reaching up to 32°C (91°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec232534404963716959433323
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 35 mm (1.4 in) over a span of 5 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 35 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec688664786728222735465660
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 46%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing embrace, making it comfortable for traveling, as the cool air balances perfectly with the moderate moisture, creating an inviting atmosphere for exploration.

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 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35810111211119653
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 Weather-5°C (23°F)67 mm (2.7 inches)91%moderate
February Weather-4°C (26°F)86 mm (3.4 inches)92%moderate
March Weather1°C (35°F)64 mm (2.5 inches)84%very high
April Weather5°C (40°F)78 mm (3.1 inches)74%very high
May Weather10°C (50°F)67 mm (2.7 inches)62%extreme
June Weather17°C (63°F)28 mm (1.1 inches)56%extreme
July Weather22°C (71°F)22 mm (0.9 inches)44%extreme
August Weather20°C (69°F)27 mm (1.1 inches)37%extreme
September Weather15°C (59°F)35 mm (1.4 inches)46%very high
October Weather6°C (43°F)46 mm (1.8 inches)67%high
November Weather1°C (33°F)56 mm (2.2 inches)84%moderate
December Weather-5°C (23°F)60 mm (2.3 inches)88%moderate

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