nomadseason

September Weather in Olivia, United States

Last updated: June 24, 2025

In Olivia, United States, the average temperature in September hovers around 18°C (64°F), with a minimum of 1°C (34°F) and a maximum reaching up to 33°C (92°F). Expect about 112 mm (4.4 in) of precipitation spread across 9 days, contributing to an average humidity of 82%. Stay prepared for a mix of conditions!

September Temperature in Olivia

In September in Olivia, the average temperature is 18°C (64°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 1°C (34°F). Be prepared for a range of temperatures, making it an ideal time for exploring the great outdoors.

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

The chart illustrates September temperature patterns in Olivia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olivia, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (92°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec161632435972747064483323
Data source: Temperature data for Olivia 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 Olivia

In Olivia in September, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.

September Precipitation Trends in Olivia

The chart displays monthly precipitation patterns in Olivia, 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 Olivia, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec2124578011194110141112922738
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Olivia

In Olivia in September humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

September Average Humidity in Olivia

This chart illustrates the average monthly humidity levels in Olivia, 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 Olivia is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Olivia

In Olivia in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Olivia.

Maximum UV Index Levels in Olivia for September

The chart shows the monthly maximum UV Index (UVI) for Olivia 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 Olivia typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3557910997532
Data source: Olivia 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 Olivia Compares to Other Months

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

This table compares monthly weather conditions in Olivia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)21 mm (0.8 inches)85%moderate
February Weather-9°C (16°F)24 mm (0.9 inches)89%moderate
March Weather0°C (32°F)57 mm (2.3 inches)81%moderate
April Weather6°C (43°F)80 mm (3.1 inches)82%high
May Weather15°C (59°F)111 mm (4.4 inches)76%very high
June Weather22°C (72°F)94 mm (3.7 inches)81%very high
July Weather23°C (74°F)110 mm (4.3 inches)82%very high
August Weather21°C (70°F)141 mm (5.5 inches)83%very high
September Weather18°C (64°F)112 mm (4.4 inches)82%high
October Weather9°C (48°F)92 mm (3.6 inches)82%moderate
November Weather1°C (33°F)27 mm (1.1 inches)87%moderate
December Weather-5°C (24°F)38 mm (1.5 inches)84%low

Compare Olivia's Climate with Cities Worldwide