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September Weather in Cortez, United States

Last updated: June 24, 2025

In Cortez, United States, the average temperature in September hovers around 17°C (64°F), with fluctuating extremes where the minimum can dip to -3°C (26°F) and the maximum can soar to 34°C (93°F). This period sees an average precipitation of 35 mm (1.4 in) over just 5 days, and a comfortable average humidity level of 59%.

September Temperature in Cortez

In September in Cortez, the average temperature is 17°C (64°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as -3°C (26°F). Be prepared for a wide range of temperatures when traveling to Cortez during this month, ensuring you pack accordingly for both warm and cooler conditions.

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

The chart illustrates September temperature patterns in Cortez, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cortez, September typically has an average temperature of 17°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec253038485870747263493927
Data source: Temperature data for Cortez 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 Cortez

In Cortez in September, the precipitation amount is 35 mm (1.4 in) over a span of 5 days.

September Precipitation Trends in Cortez

The chart displays monthly precipitation patterns in Cortez, 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 Cortez, September typically receives around 35 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec485568213212371535372751
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cortez

In Cortez in September humidity is 59%. With an average temperature of 17°C (64°F), this humidity feels like a comfortable, yet slightly muggy atmosphere, perfect for leisurely strolls but perhaps a little sticky for extensive outdoor activities.

September Average Humidity in Cortez

This chart illustrates the average monthly humidity levels in Cortez, 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 Cortez is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%76%69%53%40%36%44%59%74%83%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cortez

In Cortez 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 Cortez.

Maximum UV Index Levels in Cortez for September

The chart shows the monthly maximum UV Index (UVI) for Cortez 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 Cortez typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111213121110864
Data source: Cortez 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 Cortez Compares to Other Months

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

This table compares monthly weather conditions in Cortez, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)48 mm (1.9 inches)85%moderate
February Weather-1°C (30°F)55 mm (2.2 inches)86%high
March Weather3°C (38°F)68 mm (2.7 inches)76%very high
April Weather9°C (49°F)21 mm (0.8 inches)69%extreme
May Weather14°C (58°F)32 mm (1.3 inches)53%extreme
June Weather21°C (70°F)12 mm (0.5 inches)40%extreme
July Weather23°C (74°F)37 mm (1.4 inches)36%extreme
August Weather22°C (72°F)15 mm (0.6 inches)44%extreme
September Weather17°C (64°F)35 mm (1.4 inches)59%very high
October Weather10°C (50°F)37 mm (1.4 inches)74%very high
November Weather4°C (39°F)27 mm (1.1 inches)83%high
December Weather-3°C (27°F)51 mm (2.0 inches)85%moderate

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