September Weather in Newberg, United States

Last updated: June 24, 2025

In Newberg, United States, the average temperature in September hovers around 18°C (65°F), with fluctuations ranging from a cool 5°C (42°F) to a warm 35°C (96°F). Expect around 57 mm (2.3 in) of precipitation spread over approximately 7 days, and enjoy a comfortable average humidity of 71% throughout the month.

September Temperature in Newberg

In September in Newberg, the average temperature is 18°C (65°F). Maximums can reach 35°C (96°F), and minimums can be as low as 5°C (42°F). This makes it an ideal time for travelers to enjoy a mix of warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Newberg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newberg, September typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (96°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec424246525865707164544742
Data source: Temperature data for Newberg 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 Newberg

In Newberg in September, the precipitation amount is 57 mm (2.3 in) over a span of 7 days.

September Precipitation Trends in Newberg

The chart displays monthly precipitation patterns in Newberg, 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 Newberg, September typically receives around 57 mm (2.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec1581631211054839445791144182
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Newberg

In Newberg in September humidity is 71%. With an average temperature of 18°C (65°F), this humidity feels like a warm embrace, making it a bit sticky and muggy, which can be slightly uncomfortable for traveling, especially if you're engaging in outdoor activities or exploring the city on foot.

September Average Humidity in Newberg

This chart illustrates the average monthly humidity levels in Newberg, 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 Newberg is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Newberg

In Newberg 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 Newberg.

Maximum UV Index Levels in Newberg for September

The chart shows the monthly maximum UV Index (UVI) for Newberg 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 Newberg typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23579101097532
Data source: Newberg 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 Newberg Compares to Other Months

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

This table compares monthly weather conditions in Newberg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)158 mm (6.2 inches)85%low
February Weather5°C (42°F)163 mm (6.4 inches)84%moderate
March Weather8°C (47°F)121 mm (4.8 inches)85%moderate
April Weather11°C (52°F)105 mm (4.1 inches)83%high
May Weather15°C (58°F)48 mm (1.9 inches)83%very high
June Weather18°C (65°F)39 mm (1.5 inches)83%very high
July Weather21°C (71°F)4 mm (0.2 inches)82%very high
August Weather22°C (71°F)4 mm (0.2 inches)74%very high
September Weather18°C (65°F)57 mm (2.3 inches)71%high
October Weather12°C (54°F)91 mm (3.6 inches)81%moderate
November Weather8°C (47°F)144 mm (5.7 inches)87%moderate
December Weather5°C (42°F)182 mm (7.2 inches)87%low

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