nomadseason

September Weather in Cooper, United States

Last updated: June 24, 2025

In September, the average temperature in Cooper, United States hovers around 26°C (78°F). Expect a range between a cool 11°C (52°F) and a warm 37°C (99°F). The month brings about 81 mm (3.2 in) of precipitation over 8 days, with an average humidity of 65%.

September Temperature in Cooper

In September in Cooper, the average temperature is 26°C (78°F). Maximums can reach 37°C (99°F) and minimums can be as low as 11°C (52°F). This varied climate makes it advisable to pack layers for your travel excursions.

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

The chart illustrates September temperature patterns in Cooper, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cooper, September typically has an average temperature of 26°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec464859647380838378675551
Data source: Temperature data for Cooper generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Cooper

In Cooper in September, the precipitation amount is 81 mm (3.2 in) over the course of 8 days.

September Precipitation Trends in Cooper

The chart displays monthly precipitation patterns in Cooper, 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 Cooper, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec83130127192180986688811326292
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Cooper

In Cooper in September, humidity is 65%. With an average temperature of 26°C (78°F), this humidity feels like a warm, muggy embrace that can make outdoor activities a bit challenging, often leaving travelers feeling sticky and in need of frequent breaks in the shade.

September Average Humidity in Cooper

This chart illustrates the average monthly humidity levels in Cooper, 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 Cooper is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cooper

In Cooper 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 Cooper.

Maximum UV Index Levels in Cooper for September

The chart shows the monthly maximum UV Index (UVI) for Cooper 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 Cooper typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110864
Data source: Cooper 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 Cooper Compares to Other Months

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

This table compares monthly weather conditions in Cooper, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)83 mm (3.3 inches)80%moderate
February Weather9°C (49°F)130 mm (5.1 inches)79%high
March Weather15°C (59°F)127 mm (5.0 inches)78%very high
April Weather18°C (64°F)192 mm (7.6 inches)78%very high
May Weather23°C (73°F)180 mm (7.1 inches)81%extreme
June Weather27°C (80°F)98 mm (3.9 inches)78%extreme
July Weather28°C (84°F)66 mm (2.6 inches)73%extreme
August Weather28°C (83°F)88 mm (3.5 inches)66%extreme
September Weather26°C (78°F)81 mm (3.2 inches)65%very high
October Weather19°C (67°F)132 mm (5.2 inches)72%very high
November Weather13°C (56°F)61 mm (2.4 inches)82%high
December Weather10°C (51°F)92 mm (3.6 inches)87%moderate

Compare Cooper's Climate with Cities Worldwide