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September Weather in Montello, United States

Last updated: June 24, 2025

In September, the average temperature in Montello, United States is a pleasant 18°C (64°F). However, it's worth noting that temperatures can range from a chilly 1°C (34°F) to a warm 33°C (92°F). Expect some rain, as 92 mm (3.6 in) of precipitation usually falls over 11 days. With an average humidity of 79%, make sure to stay hydrated and enjoy the climate!

September Temperature in Montello

In September in Montello, the average temperature is 18°C (64°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 1°C (34°F). Be prepared for a range of temperatures, making it an ideal time for exploring the great outdoors.

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

The chart illustrates September temperature patterns in Montello, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montello, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec202134455970747064503628
Data source: Temperature data for Montello 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 Montello

In Montello in September, the precipitation amount is 92 mm (3.6 in) spread over 11 days.

September Precipitation Trends in Montello

The chart displays monthly precipitation patterns in Montello, 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 Montello, September typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec45506197118114111105921034649
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montello

In Montello in September, humidity is 79%. With an average temperature of 18°C (64°F), this humidity feels like a warm, sticky embrace that can make outdoor activities more challenging but also creates a lush, vibrant atmosphere that's perfect for exploring local culture and scenery.

September Average Humidity in Montello

This chart illustrates the average monthly humidity levels in Montello, 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 Montello is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montello

In Montello in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Montello.

Maximum UV Index Levels in Montello for September

The chart shows the monthly maximum UV Index (UVI) for Montello 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 Montello typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: Montello 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 Montello Compares to Other Months

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

This table compares monthly weather conditions in Montello, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (21°F)45 mm (1.8 inches)85%moderate
February Weather-6°C (21°F)50 mm (2.0 inches)85%moderate
March Weather1°C (35°F)61 mm (2.4 inches)85%moderate
April Weather7°C (45°F)97 mm (3.8 inches)85%very high
May Weather15°C (59°F)118 mm (4.6 inches)78%very high
June Weather21°C (70°F)114 mm (4.5 inches)80%very high
July Weather23°C (74°F)111 mm (4.4 inches)78%very high
August Weather21°C (71°F)105 mm (4.1 inches)76%very high
September Weather18°C (64°F)92 mm (3.6 inches)79%high
October Weather10°C (51°F)103 mm (4.0 inches)83%moderate
November Weather2°C (36°F)46 mm (1.8 inches)88%moderate
December Weather-2°C (28°F)49 mm (1.9 inches)81%low

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