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September Weather in Thoreau, United States

Last updated: June 24, 2025

In Thoreau, United States, the average temperature in September hovers around 18°C (64°F). Expect a range from a cool minimum of 2°C (35°F) to a warm maximum of 31°C (88°F). During this month, you'll encounter approximately 37 mm (1.4 in) of precipitation spread over 6 days, along with an average humidity level of 62%, making it a month of varied weather experiences.

September Temperature in Thoreau

In September in Thoreau, the average temperature is 18°C (64°F). Maximums can reach 31°C (88°F), and minimums can drop as low as 2°C (35°F). Whether you're exploring the great outdoors or enjoying the local culture, be prepared for a diverse range of weather conditions for your travels.

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

The chart illustrates September temperature patterns in Thoreau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thoreau, September typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (88°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec293341505970727064514131
Data source: Temperature data for Thoreau 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 Thoreau

In Thoreau in September, the precipitation amount is 37 mm (1.4 in) over a span of 6 days.

September Precipitation Trends in Thoreau

The chart displays monthly precipitation patterns in Thoreau, 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 Thoreau, September typically receives around 37 mm (1.4 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec283236232213883337281526
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Thoreau

In Thoreau in September humidity is 62%. With an average temperature of 18°C (64°F), this humidity feels like a warm yet refreshing embrace, making it quite pleasant for traveling as long as you stay hydrated and take breaks in the shade.

September Average Humidity in Thoreau

This chart illustrates the average monthly humidity levels in Thoreau, 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 Thoreau is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%71%61%48%36%37%46%62%74%82%82%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Thoreau

In Thoreau in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Thoreau.

Maximum UV Index Levels in Thoreau for September

The chart shows the monthly maximum UV Index (UVI) for Thoreau 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 Thoreau typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213131211864
Data source: Thoreau 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 Thoreau Compares to Other Months

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

This table compares monthly weather conditions in Thoreau, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)28 mm (1.1 inches)81%moderate
February Weather0°C (33°F)32 mm (1.3 inches)83%high
March Weather5°C (41°F)36 mm (1.4 inches)71%very high
April Weather10°C (50°F)23 mm (0.9 inches)61%extreme
May Weather15°C (59°F)22 mm (0.9 inches)48%extreme
June Weather21°C (71°F)13 mm (0.5 inches)36%extreme
July Weather22°C (72°F)88 mm (3.5 inches)37%extreme
August Weather21°C (70°F)33 mm (1.3 inches)46%extreme
September Weather18°C (64°F)37 mm (1.4 inches)62%extreme
October Weather11°C (52°F)28 mm (1.1 inches)74%very high
November Weather5°C (42°F)15 mm (0.6 inches)82%high
December Weather0°C (31°F)26 mm (1.0 inches)82%moderate

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