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September Weather in Willamina, United States

Last updated: June 24, 2025

In September, the average temperature in Willamina, United States is a pleasant 16°C (61°F). Expect minimums of around 4°C (40°F) and maximums soaring up to 35°C (95°F). During this time, anticipate 68 mm (2.7 in) of precipitation spread over 7 days, contributing to an average humidity of 71%. Stay prepared for a mix of weather as you enjoy this vibrant locale!

September Temperature in Willamina

In September in Willamina, the average temperature is 16°C (61°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (40°F). Be prepared for a wide range of temperatures when traveling to Willamina this month.

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

The chart illustrates September temperature patterns in Willamina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willamina, September typically has an average temperature of 16°C (61°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec414044495560656661524541
Data source: Temperature data for Willamina 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 Willamina

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

September Precipitation Trends in Willamina

The chart displays monthly precipitation patterns in Willamina, 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 Willamina, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec19418015012663495668105178210
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Willamina

In Willamina in September humidity is 71%. With an average temperature of 16°C (61°F), this humidity feels like walking through a warm, damp blanket, making travel slightly uncomfortable but still enjoyable for those who appreciate mild weather.

September Average Humidity in Willamina

This chart illustrates the average monthly humidity levels in Willamina, 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 Willamina 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 Willamina

In Willamina 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 Willamina.

Maximum UV Index Levels in Willamina for September

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

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

This table compares monthly weather conditions in Willamina, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)194 mm (7.6 inches)85%low
February Weather5°C (41°F)180 mm (7.1 inches)84%moderate
March Weather7°C (45°F)150 mm (5.9 inches)85%moderate
April Weather9°C (49°F)126 mm (4.9 inches)83%high
May Weather13°C (55°F)63 mm (2.5 inches)83%very high
June Weather16°C (61°F)49 mm (1.9 inches)83%very high
July Weather18°C (65°F)5 mm (0.2 inches)82%very high
August Weather19°C (66°F)6 mm (0.2 inches)74%very high
September Weather16°C (61°F)68 mm (2.7 inches)71%high
October Weather11°C (52°F)105 mm (4.1 inches)81%moderate
November Weather7°C (46°F)178 mm (7.0 inches)87%moderate
December Weather5°C (41°F)210 mm (8.3 inches)87%low

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