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September Weather in Lolo, United States

Last updated: June 24, 2025

In September, the average temperature in Lolo, United States is a pleasant 15°C (58°F). However, be prepared for a temperature range that can drop to a chilly -2°C (28°F) at night and soar up to a warm 35°C (95°F) during the day. Expect approximately 27 mm (1.1 in) of precipitation over 6 days, with an average humidity of 67%, creating a cozy atmosphere for your stay.

September Temperature in Lolo

In September in Lolo, the average temperature is 15°C (58°F), with maximums reaching 35°C (95°F) and minimums dropping as low as -2°C (28°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Lolo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lolo, September typically has an average temperature of 15°C (58°F), with highs reaching up to 35°C (95°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec262334415261716958433529
Data source: Temperature data for Lolo 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 Lolo

In Lolo in September, the precipitation amount is 27 mm (1.1 in) over a period of 6 days.

September Precipitation Trends in Lolo

The chart displays monthly precipitation patterns in Lolo, 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 Lolo, September typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec398649686564131828605563
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lolo

In Lolo in September humidity is 67%. With an average temperature of 15°C (58°F), this humidity feels like a mild blanket wrapped around you, making traveling comfortable yet slightly clingy, perfect for exploring cozy cafes and taking leisurely strolls.

September Average Humidity in Lolo

This chart illustrates the average monthly humidity levels in Lolo, 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 Lolo is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%89%85%80%78%77%66%67%77%89%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lolo

In Lolo in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Lolo.

Maximum UV Index Levels in Lolo for September

The chart shows the monthly maximum UV Index (UVI) for Lolo 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 Lolo typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098532
Data source: Lolo 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 Lolo Compares to Other Months

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

This table compares monthly weather conditions in Lolo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)39 mm (1.5 inches)93%low
February Weather-5°C (23°F)86 mm (3.4 inches)92%moderate
March Weather1°C (35°F)49 mm (1.9 inches)89%high
April Weather5°C (42°F)68 mm (2.7 inches)85%very high
May Weather11°C (52°F)65 mm (2.6 inches)80%very high
June Weather16°C (61°F)64 mm (2.5 inches)78%very high
July Weather22°C (71°F)13 mm (0.5 inches)77%very high
August Weather20°C (69°F)18 mm (0.7 inches)66%very high
September Weather15°C (58°F)27 mm (1.1 inches)67%very high
October Weather6°C (43°F)60 mm (2.4 inches)77%moderate
November Weather1°C (35°F)55 mm (2.2 inches)89%moderate
December Weather-2°C (29°F)63 mm (2.5 inches)95%low

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