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September Weather in Centralia, United States

Last updated: June 24, 2025

In Centralia, United States, the average temperature in September is a pleasant 22°C (72°F). However, be prepared for a temperature range where the minimum can drop to 6°C (43°F) and the maximum can soar to 37°C (98°F). Expect 68 mm (2.7 in) of precipitation spread across 7 days, contributing to an average humidity of 71%. So, whether you're basking in the warmth or dodging the occasional rain shower, make sure to plan accordingly!

September Temperature in Centralia

In September in Centralia, the average temperature is 22°C (72°F). Maximums can reach 37°C (98°F), and minimums can be as low as 6°C (43°F). This makes Centralia an ideal destination for travelers seeking pleasant weather while enjoying a mix of warm and cooler evenings.

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

The chart illustrates September temperature patterns in Centralia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Centralia, September typically has an average temperature of 22°C (72°F), with highs reaching up to 37°C (98°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec293045536477807671554336
Data source: Temperature data for Centralia 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 Centralia

In Centralia in September, the precipitation amount is 68 mm (2.7 in) over the course of 7 days.

September Precipitation Trends in Centralia

The chart displays monthly precipitation patterns in Centralia, 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 Centralia, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec313193822089675108681163527
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Centralia

In Centralia in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Centralia

This chart illustrates the average monthly humidity levels in Centralia, 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 Centralia is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Centralia

In Centralia 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 Centralia.

Maximum UV Index Levels in Centralia for September

The chart shows the monthly maximum UV Index (UVI) for Centralia 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 Centralia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Centralia 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 Centralia Compares to Other Months

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

This table compares monthly weather conditions in Centralia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)31 mm (1.2 inches)76%moderate
February Weather-1°C (30°F)31 mm (1.2 inches)77%moderate
March Weather7°C (45°F)93 mm (3.6 inches)70%high
April Weather12°C (53°F)82 mm (3.2 inches)73%very high
May Weather18°C (65°F)208 mm (8.2 inches)82%very high
June Weather25°C (77°F)96 mm (3.8 inches)82%extreme
July Weather27°C (80°F)75 mm (2.9 inches)81%extreme
August Weather24°C (76°F)108 mm (4.3 inches)78%very high
September Weather22°C (72°F)68 mm (2.7 inches)71%very high
October Weather13°C (55°F)116 mm (4.6 inches)71%high
November Weather6°C (43°F)34 mm (1.4 inches)81%moderate
December Weather2°C (36°F)27 mm (1.1 inches)84%moderate

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