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September Weather in Ephrata, United States

Last updated: June 24, 2025

In Ephrata, United States, the average temperature in September hovers around 21°C (70°F), offering a pleasant climate for exploration. However, be prepared for a temperature swing, with minimums dropping to 4°C (40°F) and maximums soaring to 34°C (94°F). During this month, expect 103 mm (4.1 in) of precipitation over 10 days, and with an average humidity of 66%, it's wise to pack accordingly for both warm days and potential rain.

September Temperature in Ephrata

In September in Ephrata, the average temperature is 21°C (70°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 4°C (40°F). It's a great time for travelers to enjoy a mix of warm days and cooler evenings, making it perfect for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Ephrata, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ephrata, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec343642536372787569594437
Data source: Temperature data for Ephrata 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 Ephrata

In Ephrata in September, the precipitation amount is 103 mm (4.1 in) over a span of 10 days.

September Precipitation Trends in Ephrata

The chart displays monthly precipitation patterns in Ephrata, 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 Ephrata, September typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec681061021021279613113310310592100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ephrata

In Ephrata in September humidity is 66%. With an average temperature of 21°C (70°F), this humidity feels like a warm embrace, making it comfortable for leisurely strolls but slightly sticky for longer excursions.

September Average Humidity in Ephrata

This chart illustrates the average monthly humidity levels in Ephrata, 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 Ephrata is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ephrata

In Ephrata 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 Ephrata.

Maximum UV Index Levels in Ephrata for September

The chart shows the monthly maximum UV Index (UVI) for Ephrata 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 Ephrata typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Ephrata 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 Ephrata Compares to Other Months

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

This table compares monthly weather conditions in Ephrata, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)68 mm (2.7 inches)87%moderate
February Weather2°C (37°F)106 mm (4.2 inches)85%moderate
March Weather6°C (43°F)102 mm (4.0 inches)85%high
April Weather12°C (53°F)102 mm (4.0 inches)83%very high
May Weather17°C (63°F)127 mm (5.0 inches)75%very high
June Weather22°C (72°F)96 mm (3.8 inches)73%very high
July Weather25°C (78°F)131 mm (5.2 inches)65%very high
August Weather24°C (76°F)133 mm (5.2 inches)62%very high
September Weather21°C (70°F)103 mm (4.1 inches)66%very high
October Weather15°C (59°F)105 mm (4.1 inches)79%high
November Weather7°C (44°F)92 mm (3.6 inches)87%moderate
December Weather3°C (38°F)99 mm (3.9 inches)85%low

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