September Weather in Thompson, United States

Last updated: June 24, 2025

In September, the average temperature in Thompson, United States is a pleasant 15°C (60°F). However, don't be surprised by the temperature swings, as it can dip to a chilly -3°C (28°F) or soar up to a sweltering 32°C (90°F). Expect some rain, with a total precipitation of 71 mm (2.8 in) over approximately 9 days. With average humidity at a cozy 77%, it’s essential to be prepared for varying weather conditions!

September Temperature in Thompson

In September in Thompson, the average temperature is 15°C (60°F). Maximums can reach 32°C (90°F) while minimums can dip as low as -3°C (28°F). Be prepared for a wide range of temperatures when traveling during this month.

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

The chart illustrates September temperature patterns in Thompson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thompson, September typically has an average temperature of 15°C (60°F), with highs reaching up to 32°C (90°F) and lows dropping to around -3°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec9827395669726859432717
Data source: Temperature data for Thompson 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 Thompson

In Thompson in September, the precipitation amount is 71 mm (2.8 in) spread over 9 days.

September Precipitation Trends in Thompson

The chart displays monthly precipitation patterns in Thompson, 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 Thompson, September typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec182026395587587871782438
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Thompson

In Thompson in September, humidity is 77%. With an average temperature of 15°C (60°F), this humidity feels like you're wading through a warm, heavy blanket, making travel feel more exhausting and sticky than usual.

September Average Humidity in Thompson

This chart illustrates the average monthly humidity levels in Thompson, 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 Thompson is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%85%81%75%79%77%78%77%79%86%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Thompson

In Thompson 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 Thompson.

Maximum UV Index Levels in Thompson for September

The chart shows the monthly maximum UV Index (UVI) for Thompson 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 Thompson typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245789987432
Data source: Thompson 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 Thompson Compares to Other Months

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

This table compares monthly weather conditions in Thompson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (10°F)18 mm (0.7 inches)90%low
February Weather-13°C (8°F)20 mm (0.8 inches)92%moderate
March Weather-3°C (27°F)25 mm (1.0 inches)85%moderate
April Weather4°C (39°F)39 mm (1.5 inches)81%high
May Weather13°C (56°F)55 mm (2.2 inches)75%very high
June Weather20°C (69°F)87 mm (3.4 inches)79%very high
July Weather22°C (72°F)58 mm (2.3 inches)76%very high
August Weather20°C (68°F)77 mm (3.1 inches)78%very high
September Weather15°C (60°F)71 mm (2.8 inches)77%high
October Weather6°C (44°F)78 mm (3.1 inches)79%moderate
November Weather-3°C (27°F)24 mm (1.0 inches)86%moderate
December Weather-8°C (17°F)38 mm (1.5 inches)86%low

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