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September Weather in Montpelier, United States

Last updated: June 24, 2025

In September, the average temperature in Montpelier, United States hovers around 13°C (56°F), with a minimum of -6°C (21°F) and a maximum that can reach up to 30°C (87°F). Expect about 44 mm (1.7 in) of precipitation spread over 6 days, accompanied by an average humidity of 52%.

September Temperature in Montpelier

In September in Montpelier, the average temperature is 13°C (56°F). The maximum can reach 30°C (87°F), while the minimum can be as low as -6°C (21°F). This makes it essential to pack for both warm and chilly weather if you're planning to travel during this time.

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

The chart illustrates September temperature patterns in Montpelier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montpelier, September typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (87°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec212331364559686556402921
Data source: Temperature data for Montpelier 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 Montpelier

In Montpelier in September, the total precipitation amount is 44 mm (1.7 in) spread over 6 days.

September Precipitation Trends in Montpelier

The chart displays monthly precipitation patterns in Montpelier, 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 Montpelier, September typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec639057676937203044515857
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montpelier

In Montpelier in September, humidity is 52%. With an average temperature of 13°C (56°F), this humidity feels like a refreshing breeze that lightly cools the skin, making it comfortable for exploring the area while enjoying the pleasant weather.

September Average Humidity in Montpelier

This chart illustrates the average monthly humidity levels in Montpelier, 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 Montpelier is approximately 52%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%95%90%81%71%64%59%49%52%69%86%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montpelier

In Montpelier 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 Montpelier.

Maximum UV Index Levels in Montpelier for September

The chart shows the monthly maximum UV Index (UVI) for Montpelier 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 Montpelier typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35810111211119643
Data source: Montpelier 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 Montpelier Compares to Other Months

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

This table compares monthly weather conditions in Montpelier, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)63 mm (2.5 inches)95%moderate
February Weather-5°C (23°F)90 mm (3.5 inches)95%moderate
March Weather0°C (32°F)57 mm (2.2 inches)90%very high
April Weather2°C (36°F)67 mm (2.7 inches)81%very high
May Weather7°C (46°F)69 mm (2.7 inches)71%extreme
June Weather15°C (59°F)37 mm (1.5 inches)64%extreme
July Weather20°C (68°F)20 mm (0.8 inches)59%extreme
August Weather19°C (66°F)30 mm (1.2 inches)49%extreme
September Weather13°C (56°F)44 mm (1.7 inches)52%very high
October Weather4°C (40°F)51 mm (2.0 inches)69%high
November Weather-2°C (29°F)58 mm (2.3 inches)86%moderate
December Weather-6°C (21°F)57 mm (2.2 inches)91%moderate

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