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September Weather in Entiat, United States

Last updated: June 24, 2025

In September, the average temperature in Entiat, United States hovers around 15°C (58°F). Temperatures can fluctuate, dipping to a minimum of 1°C (34°F) and soaring to a maximum of 34°C (93°F). Expect about 28 mm (1.1 in) of precipitation spread over approximately 4 days, with an average humidity level of 62%.

September Temperature in Entiat

In September in Entiat, the average temperature is 15°C (58°F). Maximums can reach 34°C (93°F), and minimums can drop as low as 1°C (34°F). Travelers should pack for a wide range of temperatures and plan accordingly for both warm days and chilly nights.

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

The chart illustrates September temperature patterns in Entiat, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Entiat, September typically has an average temperature of 15°C (58°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec282836445461686858453629
Data source: Temperature data for Entiat 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 Entiat

In Entiat in September, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

September Precipitation Trends in Entiat

The chart displays monthly precipitation patterns in Entiat, 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 Entiat, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec9685524530143428637491
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Entiat

In Entiat in September humidity is 62%. With an average temperature of 15°C (58°F), this humidity feels like a brisk embrace, making outdoor activities invigorating yet slightly damp, ideal for exploring but also requiring a light jacket.

September Average Humidity in Entiat

This chart illustrates the average monthly humidity levels in Entiat, 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 Entiat is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%87%84%81%82%79%63%62%83%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Entiat

In Entiat 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 Entiat.

Maximum UV Index Levels in Entiat for September

The chart shows the monthly maximum UV Index (UVI) for Entiat 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 Entiat typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2467891097532
Data source: Entiat 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 Entiat Compares to Other Months

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

This table compares monthly weather conditions in Entiat, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)96 mm (3.8 inches)86%low
February Weather-2°C (28°F)84 mm (3.3 inches)86%moderate
March Weather2°C (36°F)52 mm (2.0 inches)87%high
April Weather7°C (44°F)45 mm (1.8 inches)84%high
May Weather12°C (55°F)30 mm (1.2 inches)81%very high
June Weather16°C (61°F)14 mm (0.6 inches)82%very high
July Weather20°C (68°F)3 mm (0.1 inches)79%very high
August Weather20°C (68°F)4 mm (0.2 inches)63%very high
September Weather15°C (58°F)28 mm (1.1 inches)62%high
October Weather7°C (45°F)63 mm (2.5 inches)83%moderate
November Weather2°C (36°F)74 mm (2.9 inches)89%moderate
December Weather-2°C (29°F)91 mm (3.6 inches)88%low

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