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September Weather in Vernon, United States

Last updated: June 24, 2025

In September, the average temperature in Vernon, United States is a warm 25°C (77°F). Be prepared for a range of temperatures, as the minimum can drop to a crisp 8°C (47°F), while the maximum can soar to a scorching 39°C (102°F). With an average humidity of 64% and precipitation totaling 92 mm (3.6 in) over 7 days, it's ideal to pack both light clothing and a weatherproof jacket!

September Temperature in Vernon

In September in Vernon, the average temperature is 25°C (77°F). Maximums can reach 39°C (102°F), while minimums can dip as low as 8°C (47°F). Be prepared for warm days and cool evenings when traveling during this time.

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 39°C (102°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec424457637382868477645346
Data source: Temperature data for Vernon 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 Vernon

In Vernon in September, the precipitation amount is 92 mm (3.6 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 92 mm (3.6 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec3328649911363234292662327
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Vernon

In Vernon in September, humidity is 64%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making outdoor excursions feel a bit heavier, yet still inviting for travelers seeking a vibrant atmosphere.

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 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110854
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.
 TemperaturePrecipitationHumidityUV
January Weather6°C (42°F)33 mm (1.3 inches)76%moderate
February Weather7°C (44°F)28 mm (1.1 inches)76%high
March Weather14°C (57°F)64 mm (2.5 inches)70%very high
April Weather17°C (63°F)99 mm (3.9 inches)72%very high
May Weather23°C (73°F)113 mm (4.5 inches)82%extreme
June Weather28°C (82°F)63 mm (2.5 inches)82%extreme
July Weather30°C (86°F)22 mm (0.9 inches)80%extreme
August Weather29°C (84°F)42 mm (1.7 inches)72%extreme
September Weather25°C (77°F)92 mm (3.6 inches)64%very high
October Weather18°C (65°F)66 mm (2.6 inches)71%very high
November Weather12°C (53°F)23 mm (0.9 inches)81%moderate
December Weather8°C (47°F)27 mm (1.0 inches)84%moderate

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