nomadseason

September Weather in Opal, United States

Last updated: June 24, 2025

The average temperature in Opal, United States during September is a pleasant 22°C (72°F). However, temperatures can vary significantly, with a minimum of 5°C (41°F) and a maximum reaching 37°C (100°F). Expect an average precipitation of 90 mm (3.5 in) spread over 11 days, coupled with an average humidity of 68%. Enjoy the blend of warm weather and occasional showers!

September Temperature in Opal

In September in Opal, the average temperature is 22°C (72°F). The maximum can reach 37°C (100°F) and the minimum can be as low as 5°C (41°F). It's advisable to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Opal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Opal, September typically has an average temperature of 22°C (72°F), with highs reaching up to 37°C (100°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec374248586775817872624741
Data source: Temperature data for Opal 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 Opal

In Opal in September, the total precipitation amounts to 90 mm (3.5 in) over the course of 11 days.

September Precipitation Trends in Opal

The chart displays monthly precipitation patterns in Opal, 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 Opal, September typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec60907410311610685132901068085
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Opal

In Opal in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Opal

This chart illustrates the average monthly humidity levels in Opal, 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 Opal is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Opal

In Opal in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Opal.

Maximum UV Index Levels in Opal for September

The chart shows the monthly maximum UV Index (UVI) for Opal 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 Opal typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Opal 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 Opal Compares to Other Months

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

This table compares monthly weather conditions in Opal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)60 mm (2.3 inches)86%moderate
February Weather6°C (42°F)90 mm (3.5 inches)86%moderate
March Weather9°C (48°F)74 mm (2.9 inches)86%high
April Weather14°C (58°F)103 mm (4.1 inches)84%very high
May Weather19°C (67°F)116 mm (4.5 inches)78%very high
June Weather24°C (76°F)106 mm (4.2 inches)79%very high
July Weather27°C (81°F)85 mm (3.3 inches)70%very high
August Weather25°C (78°F)132 mm (5.2 inches)59%very high
September Weather22°C (72°F)90 mm (3.5 inches)68%very high
October Weather17°C (63°F)106 mm (4.2 inches)80%high
November Weather9°C (48°F)80 mm (3.2 inches)86%moderate
December Weather5°C (42°F)85 mm (3.3 inches)85%moderate

Compare Opal's Climate with Cities Worldwide