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September Weather in Marysville, United States

Last updated: June 24, 2025

In September, the average temperature in Marysville, United States hovers around 15°C (60°F). Expect a minimum of 8°C (47°F) and a maximum soaring to 30°C (86°F). Visitors should be prepared for 114 mm (4.5 in) of precipitation over 12 days, accompanied by an average humidity of 62%. Enjoy the diverse weather on your journey!

September Temperature in Marysville

In September in Marysville, the average temperature is 15°C (60°F). Maximums can reach 30°C (86°F), and minimums can be as low as 8°C (47°F). This range makes Marysville a comfortable destination for travelers seeking mild weather and a pleasant outdoor experience.

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

The chart illustrates September temperature patterns in Marysville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marysville, September typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (86°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424044495559636460514641
Data source: Temperature data for Marysville 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 Marysville

In Marysville in September, the precipitation amount is 114 mm (4.5 in) spread over 12 days.

September Precipitation Trends in Marysville

The chart displays monthly precipitation patterns in Marysville, 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 Marysville, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec21920916513887823133114196254247
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Marysville

In Marysville in September, humidity is 62%. With an average temperature of 15°C (60°F), this humidity feels like a warm embrace, making it a bit muggy for traveling, yet pleasantly refreshing for leisurely strolls and outdoor exploration.

September Average Humidity in Marysville

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

In Marysville 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 Marysville.

Maximum UV Index Levels in Marysville for September

The chart shows the monthly maximum UV Index (UVI) for Marysville 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 Marysville typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987521
Data source: Marysville 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 Marysville Compares to Other Months

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

This table compares monthly weather conditions in Marysville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)219 mm (8.6 inches)86%low
February Weather4°C (40°F)209 mm (8.2 inches)86%moderate
March Weather7°C (44°F)165 mm (6.5 inches)87%moderate
April Weather9°C (49°F)138 mm (5.4 inches)84%high
May Weather13°C (55°F)87 mm (3.4 inches)81%very high
June Weather15°C (60°F)81 mm (3.2 inches)82%very high
July Weather17°C (64°F)31 mm (1.2 inches)79%very high
August Weather18°C (65°F)33 mm (1.3 inches)63%very high
September Weather15°C (60°F)114 mm (4.5 inches)62%high
October Weather11°C (51°F)196 mm (7.7 inches)83%moderate
November Weather8°C (46°F)254 mm (10.0 inches)89%low
December Weather5°C (42°F)247 mm (9.7 inches)88%low

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