September Weather in Thompson, United States

Last updated: June 24, 2025

In Thompson, United States, the average temperature in September is a pleasant 19°C (66°F). Expect a range of temperatures, with a minimum of 4°C (39°F) and a maximum dipping up to 34°C (94°F). Rainfall is common, with an average precipitation of 92 mm (3.6 in) spread over 8 days, contributing to a 75% average humidity that adds to the region's vibrant atmosphere.

September Temperature in Thompson

In September in Thompson, the average temperature is 19°C (66°F). Maximums can reach 34°C (94°F), while minimums can drop to as low as 4°C (39°F). This range of temperatures makes it essential for travelers to pack both lightweight clothing for warm days and layers for cooler evenings.

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 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Thompson generated using information from the Copernicus Climate Change Service.

September Precipitation in Thompson

In Thompson in September, the precipitation amount is 92 mm (3.6 in), occurring over the course of 8 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 92 mm (3.6 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Thompson

In Thompson in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

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 75%, offering insight into how humid the weather typically is during this month.

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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	69 mm (2.7 inches)	84%	moderate
February Weather	0°C (33°F)	87 mm (3.4 inches)	84%	moderate
March Weather	3°C (38°F)	94 mm (3.7 inches)	82%	high
April Weather	9°C (48°F)	128 mm (5.0 inches)	79%	very high
May Weather	15°C (59°F)	102 mm (4.0 inches)	75%	very high
June Weather	20°C (68°F)	92 mm (3.6 inches)	78%	very high
July Weather	23°C (74°F)	144 mm (5.7 inches)	76%	very high
August Weather	23°C (73°F)	102 mm (4.0 inches)	76%	very high
September Weather	19°C (66°F)	92 mm (3.6 inches)	75%	very high
October Weather	13°C (56°F)	141 mm (5.6 inches)	75%	high
November Weather	6°C (42°F)	98 mm (3.9 inches)	80%	moderate
December Weather	1°C (34°F)	123 mm (4.8 inches)	80%	low