September Weather in Vernon, United States

Last updated: June 24, 2025

In September, the average temperature in Vernon, United States hovers around 25°C (77°F). Expect a minimum of 10°C (51°F) and a maximum of 37°C (99°F), providing a warm yet variable climate. With an average precipitation of 95 mm (3.7 in) spread over 7 days, don't forget to pack an umbrella! The average humidity rests at a comfortable 74%, making it a lovely time to explore the area.

September Temperature in Vernon

In September in Vernon, the average temperature is 25°C (77°F). Maximum temperatures can reach up to 37°C (99°F), while the minimum can drop as low as 10°C (51°F). Overall, it's a great time to visit Vernon if you enjoy warm weather with a refreshing cooler breeze in the evenings.

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

The chart illustrates September temperature patterns in Vernon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vernon, September typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 10°C (51°F).

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

September Precipitation in Vernon

In Vernon in September, the precipitation amount is 95 mm (3.7 in) over the course of 7 days.

September Precipitation Trends in Vernon

The chart displays monthly precipitation patterns in Vernon, 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 Vernon, September typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 7 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 Vernon

In Vernon in September humidity is 74%. With an average temperature of 25°C (77°F), this humidity feels like a warm, muggy blanket wrapping around you, making travel a bit more challenging as you find yourself sticky and in need of frequent breaks to hydrate and cool down.

September Average Humidity in Vernon

This chart illustrates the average monthly humidity levels in Vernon, 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 Vernon is approximately 74%, 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 Vernon

In Vernon in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Vernon.

Maximum UV Index Levels in Vernon for September

The chart shows the monthly maximum UV Index (UVI) for Vernon 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 Vernon typically reaches 9, which falls under the very high exposure category.

Data source: Vernon 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 Vernon Compares to Other Months

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

This table compares monthly weather conditions in Vernon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	124 mm (4.9 inches)	85%	moderate
February Weather	11°C (51°F)	186 mm (7.3 inches)	84%	high
March Weather	14°C (58°F)	175 mm (6.9 inches)	82%	very high
April Weather	17°C (63°F)	171 mm (6.7 inches)	82%	very high
May Weather	22°C (73°F)	128 mm (5.0 inches)	82%	extreme
June Weather	25°C (78°F)	150 mm (5.9 inches)	79%	extreme
July Weather	27°C (81°F)	99 mm (3.9 inches)	82%	extreme
August Weather	27°C (81°F)	130 mm (5.1 inches)	77%	extreme
September Weather	25°C (77°F)	95 mm (3.7 inches)	74%	very high
October Weather	19°C (67°F)	104 mm (4.1 inches)	73%	high
November Weather	11°C (53°F)	73 mm (2.9 inches)	85%	high
December Weather	10°C (50°F)	150 mm (5.9 inches)	88%	moderate