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September Weather in Douglas, United States

Last updated: June 24, 2025

In September, the average temperature in Douglas, United States is a warm 26°C (79°F), though it can range from a cool 13°C (55°F) to a scorching 39°C (102°F). Expect 122 mm (4.8 in) of precipitation spread over about 13 days, with an average humidity of 83% creating a humid atmosphere throughout the month.

September Temperature in Douglas

In September in Douglas, the average temperature is 26°C (79°F). Maximums can reach 39°C (102°F), while minimums can drop as low as 13°C (55°F). Travelers should prepare for warm days and cooler evenings during this time.

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

The chart illustrates September temperature patterns in Douglas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Douglas, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (102°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec525862687680828279725954
Data source: Temperature data for Douglas 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 Douglas

In Douglas in September, the precipitation amount is 122 mm (4.8 in) recorded over a span of 13 days.

September Precipitation Trends in Douglas

The chart displays monthly precipitation patterns in Douglas, 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 Douglas, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec68887077711141371191227445119
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Douglas

In Douglas in September, humidity is 83%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket enveloping you, making travel an exercise in endurance as the air clings to your skin and saps your energy.

September Average Humidity in Douglas

This chart illustrates the average monthly humidity levels in Douglas, 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 Douglas is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Douglas

In Douglas 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 Douglas.

Maximum UV Index Levels in Douglas for September

The chart shows the monthly maximum UV Index (UVI) for Douglas 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 Douglas typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579101111111110864
Data source: Douglas 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 Douglas Compares to Other Months

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

This table compares monthly weather conditions in Douglas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)68 mm (2.7 inches)85%moderate
February Weather15°C (59°F)88 mm (3.5 inches)82%high
March Weather17°C (63°F)70 mm (2.8 inches)80%very high
April Weather20°C (68°F)77 mm (3.0 inches)76%very high
May Weather24°C (76°F)70 mm (2.8 inches)73%extreme
June Weather27°C (80°F)114 mm (4.5 inches)74%extreme
July Weather28°C (82°F)137 mm (5.4 inches)80%extreme
August Weather28°C (82°F)119 mm (4.7 inches)79%extreme
September Weather26°C (79°F)122 mm (4.8 inches)83%very high
October Weather22°C (72°F)74 mm (2.9 inches)77%very high
November Weather15°C (59°F)45 mm (1.8 inches)84%high
December Weather12°C (55°F)119 mm (4.7 inches)88%moderate

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