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September Weather in Silverton, United States

Last updated: June 24, 2025

In Silverton, United States, the average temperature in September hovers around 23°C (74°F). Expect a range where the minimum can dip to 4°C (40°F), while the maximum can soar up to 37°C (100°F). The month brings about 62 mm (2.5 in) of precipitation, typically spread over 7 days, and the average humidity sits at a comfortable 72%.

September Temperature in Silverton

In September in Silverton, the average temperature is 23°C (74°F). Maximum temperatures can reach 37°C (100°F), while minimum temperatures can drop as low as 4°C (40°F). Be prepared for a wide range of weather conditions during your travels.

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

The chart illustrates September temperature patterns in Silverton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Silverton, September typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (100°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec404253596978818073605044
Data source: Temperature data for Silverton 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 Silverton

In Silverton in September, the precipitation amount is 62 mm (2.5 in) over a period of 7 days.

September Precipitation Trends in Silverton

The chart displays monthly precipitation patterns in Silverton, 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 Silverton, September typically receives around 62 mm (2.5 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec191450427456365262501423
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Silverton

In Silverton in September humidity is 72%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket that clings to the skin, making outdoor activities a challenge but offering a refreshing atmosphere for leisurely strolls in the shade.

September Average Humidity in Silverton

This chart illustrates the average monthly humidity levels in Silverton, 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 Silverton is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Silverton

In Silverton in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Silverton.

Maximum UV Index Levels in Silverton for September

The chart shows the monthly maximum UV Index (UVI) for Silverton 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 Silverton typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111112121110864
Data source: Silverton 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 Silverton Compares to Other Months

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

This table compares monthly weather conditions in Silverton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (40°F)19 mm (0.7 inches)75%moderate
February Weather5°C (42°F)14 mm (0.6 inches)76%high
March Weather12°C (53°F)50 mm (2.0 inches)64%very high
April Weather15°C (60°F)42 mm (1.6 inches)70%extreme
May Weather21°C (70°F)74 mm (2.9 inches)78%extreme
June Weather25°C (78°F)56 mm (2.2 inches)81%extreme
July Weather27°C (81°F)36 mm (1.4 inches)82%extreme
August Weather26°C (80°F)52 mm (2.1 inches)78%extreme
September Weather23°C (74°F)62 mm (2.5 inches)72%very high
October Weather16°C (60°F)50 mm (2.0 inches)73%very high
November Weather10°C (50°F)14 mm (0.6 inches)80%high
December Weather7°C (44°F)23 mm (0.9 inches)81%moderate

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