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September Weather in Lyndon, United States

Last updated: June 24, 2025

In September, the average temperature in Lyndon, United States is a pleasant 22°C (72°F). Expect a range with minimums dropping to 5°C (42°F) and maximums soaring up to 34°C (94°F). During this time, precipitation averages around 79 mm (3.1 in) over 8 days, with an average humidity of 71%.

September Temperature in Lyndon

In September, in Lyndon, the average temperature is 22°C (72°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 5°C (42°F). This wide temperature range makes Lyndon an ideal destination for travelers seeking both warm and cooler experiences throughout the month.

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

The chart illustrates September temperature patterns in Lyndon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lyndon, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec323447556677807772574538
Data source: Temperature data for Lyndon 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 Lyndon

In Lyndon in September, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

September Precipitation Trends in Lyndon

The chart displays monthly precipitation patterns in Lyndon, 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 Lyndon, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4934949119711099124791203631
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Lyndon

In Lyndon in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Lyndon

This chart illustrates the average monthly humidity levels in Lyndon, 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 Lyndon is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lyndon

In Lyndon 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 Lyndon.

Maximum UV Index Levels in Lyndon for September

The chart shows the monthly maximum UV Index (UVI) for Lyndon 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 Lyndon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109743
Data source: Lyndon 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 Lyndon Compares to Other Months

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

This table compares monthly weather conditions in Lyndon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)49 mm (1.9 inches)76%moderate
February Weather1°C (34°F)34 mm (1.3 inches)77%high
March Weather9°C (48°F)94 mm (3.7 inches)70%high
April Weather13°C (55°F)91 mm (3.6 inches)73%very high
May Weather19°C (66°F)197 mm (7.8 inches)82%very high
June Weather25°C (78°F)110 mm (4.3 inches)82%extreme
July Weather27°C (80°F)99 mm (3.9 inches)81%extreme
August Weather25°C (77°F)123 mm (4.9 inches)78%very high
September Weather22°C (72°F)79 mm (3.1 inches)71%very high
October Weather14°C (58°F)120 mm (4.7 inches)71%high
November Weather7°C (45°F)36 mm (1.4 inches)81%moderate
December Weather4°C (39°F)31 mm (1.2 inches)84%moderate

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