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September Weather in Montrose, United States

Last updated: June 24, 2025

In September, the average temperature in Montrose, United States sits comfortably at 18°C (65°F), with minimums dipping to 0°C (32°F) and maximums soaring to 34°C (94°F). Expect around 100 mm (3.9 in) of precipitation spread over 10 days, while humidity averages at a notable 80%.

September Temperature in Montrose

In September in Montrose, the average temperature is 18°C (65°F). Maximum temperatures can reach up to 34°C (94°F), while minimums can drop as low as 0°C (32°F). Be prepared for a range of weather conditions when traveling to Montrose during this time.

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

The chart illustrates September temperature patterns in Montrose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montrose, September typically has an average temperature of 18°C (65°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec252636465969747264533831
Data source: Temperature data for Montrose 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 Montrose

In Montrose in September, the precipitation amount is 100 mm (3.9 in) over a span of 10 days.

September Precipitation Trends in Montrose

The chart displays monthly precipitation patterns in Montrose, 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 Montrose, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec6063628911211770811001126358
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montrose

In Montrose in September, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

September Average Humidity in Montrose

This chart illustrates the average monthly humidity levels in Montrose, 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 Montrose is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montrose

In Montrose 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 Montrose.

Maximum UV Index Levels in Montrose for September

The chart shows the monthly maximum UV Index (UVI) for Montrose 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 Montrose typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Montrose 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 Montrose Compares to Other Months

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

This table compares monthly weather conditions in Montrose, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)60 mm (2.3 inches)88%low
February Weather-3°C (26°F)63 mm (2.5 inches)87%moderate
March Weather2°C (36°F)62 mm (2.4 inches)85%moderate
April Weather8°C (46°F)89 mm (3.5 inches)86%very high
May Weather15°C (59°F)112 mm (4.4 inches)80%very high
June Weather21°C (69°F)117 mm (4.6 inches)80%very high
July Weather23°C (74°F)70 mm (2.7 inches)80%very high
August Weather22°C (72°F)81 mm (3.2 inches)80%very high
September Weather18°C (65°F)100 mm (3.9 inches)80%high
October Weather11°C (53°F)112 mm (4.4 inches)84%moderate
November Weather3°C (38°F)63 mm (2.5 inches)89%moderate
December Weather0°C (32°F)58 mm (2.3 inches)86%low

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