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September Weather in Copperopolis, United States

Last updated: June 24, 2025

In Copperopolis, United States, the average temperature in September is a pleasant 23°C (73°F). However, temperatures can fluctuate significantly, with a minimum of 8°C (46°F) and reaching highs of 42°C (107°F). Visitors can expect minimal rainfall, with an average precipitation amount of just 4 mm (0.2 in) over 0 days. The air is relatively comfortable, boasting an average humidity level of 55%.

September Temperature in Copperopolis

In September in Copperopolis, the average temperature is 23°C (73°F). Maximum temperatures can reach 42°C (107°F) while minimums can drop to as low as 8°C (46°F). Be prepared for a range of temperatures and pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Copperopolis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Copperopolis, September typically has an average temperature of 23°C (73°F), with highs reaching up to 42°C (107°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec485054606674787773635448
Data source: Temperature data for Copperopolis 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 Copperopolis

In Copperopolis in September, the precipitation amount is 4 mm (0.2 in) over the course of 0 days.

September Precipitation Trends in Copperopolis

The chart displays monthly precipitation patterns in Copperopolis, 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 Copperopolis, September typically receives around 4 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec141133145663820043768123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Copperopolis

In Copperopolis in September, humidity is 55%. With an average temperature of 23°C (73°F), this humidity feels like a warm embrace, invigorating for outdoor adventures but also prompting travelers to stay hydrated and seek occasional shade during their explorations.

September Average Humidity in Copperopolis

This chart illustrates the average monthly humidity levels in Copperopolis, 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 Copperopolis is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Copperopolis

In Copperopolis in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Copperopolis.

Maximum UV Index Levels in Copperopolis for September

The chart shows the monthly maximum UV Index (UVI) for Copperopolis 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 Copperopolis typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3588101111109643
Data source: Copperopolis 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 Copperopolis Compares to Other Months

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

This table compares monthly weather conditions in Copperopolis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)141 mm (5.6 inches)82%moderate
February Weather10°C (50°F)133 mm (5.2 inches)84%moderate
March Weather12°C (54°F)145 mm (5.7 inches)82%very high
April Weather15°C (60°F)65 mm (2.6 inches)78%very high
May Weather19°C (66°F)38 mm (1.5 inches)71%very high
June Weather23°C (74°F)2 mm (0.1 inches)64%extreme
July Weather26°C (78°F)0 mm (0.0 inches)58%extreme
August Weather25°C (78°F)0 mm (0.0 inches)54%very high
September Weather23°C (73°F)4 mm (0.2 inches)55%very high
October Weather17°C (64°F)36 mm (1.4 inches)62%high
November Weather12°C (54°F)68 mm (2.7 inches)78%moderate
December Weather9°C (48°F)123 mm (4.8 inches)80%moderate

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