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September Weather in Downieville-Lawson-Dumont, United States

Last updated: June 24, 2025

In September, the average temperature in Downieville-Lawson-Dumont, United States is a mild 11°C (51°F). Temperatures can fluctuate significantly, with minimums reaching -9°C (15°F) and maximums soaring to 27°C (81°F). Expect about 70 mm (2.8 in) of precipitation over 12 days, contributing to an average humidity of 65%.

September Temperature in Downieville-Lawson-Dumont

In September in Downieville-Lawson-Dumont, the average temperature is 11°C (51°F), with maximums reaching up to 27°C (81°F) and minimums dropping as low as -9°C (15°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm and cold weather.

September Weather in Downieville-Lawson-Dumont: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Downieville-Lawson-Dumont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Downieville-Lawson-Dumont, September typically has an average temperature of 11°C (51°F), with highs reaching up to 27°C (81°F) and lows dropping to around -9°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec212027324153585751373023
Data source: Temperature data for Downieville-Lawson-Dumont 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 Downieville-Lawson-Dumont

In Downieville-Lawson-Dumont in September, the precipitation amount is 70 mm (2.8 in) over the course of 12 days.

September Precipitation Trends in Downieville-Lawson-Dumont

The chart displays monthly precipitation patterns in Downieville-Lawson-Dumont, 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 Downieville-Lawson-Dumont, September typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2642697516013015812570583123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Downieville-Lawson-Dumont

In Downieville-Lawson-Dumont in September, humidity is 65%. With an average temperature of 11°C (51°F), this humidity feels like a refreshing yet brisk embrace, making it ideal for exploring the sights while layered in comfortable clothing.

September Average Humidity in Downieville-Lawson-Dumont

This chart illustrates the average monthly humidity levels in Downieville-Lawson-Dumont, 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 Downieville-Lawson-Dumont is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Downieville-Lawson-Dumont

In Downieville-Lawson-Dumont 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 Downieville-Lawson-Dumont.

Maximum UV Index Levels in Downieville-Lawson-Dumont for September

The chart shows the monthly maximum UV Index (UVI) for Downieville-Lawson-Dumont 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 Downieville-Lawson-Dumont typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4610131313131210754
Data source: Downieville-Lawson-Dumont 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 Downieville-Lawson-Dumont Compares to Other Months

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

This table compares monthly weather conditions in Downieville-Lawson-Dumont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)26 mm (1.0 inches)88%moderate
February Weather-7°C (20°F)42 mm (1.6 inches)87%high
March Weather-3°C (28°F)69 mm (2.7 inches)81%very high
April Weather0°C (32°F)75 mm (3.0 inches)76%extreme
May Weather5°C (41°F)160 mm (6.3 inches)66%extreme
June Weather12°C (54°F)130 mm (5.1 inches)58%extreme
July Weather15°C (58°F)158 mm (6.2 inches)52%extreme
August Weather14°C (57°F)125 mm (4.9 inches)56%extreme
September Weather11°C (51°F)70 mm (2.8 inches)65%very high
October Weather3°C (37°F)58 mm (2.3 inches)76%high
November Weather-1°C (30°F)31 mm (1.2 inches)82%moderate
December Weather-5°C (23°F)23 mm (0.9 inches)89%moderate

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