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September Weather in Truro, United States

Last updated: June 24, 2025

In September, the average temperature in Truro, United States hovers around 19°C (66°F), providing a pleasant climate for outdoor activities. Visitors can expect temperatures to vary, with a minimum of 13°C (56°F) and a maximum of 24°C (76°F). However, be prepared for some rain, as precipitation amounts to 110 mm (4.3 in) over about 10 days. With an average humidity of 75%, it's a good idea to pack for both comfort and the occasional shower!

September Temperature in Truro

In September in Truro, the average temperature is 19°C (66°F), with a maximum reaching 24°C (76°F) and a minimum dropping to as low as 13°C (56°F). This mild climate makes it a pleasant destination for travelers looking to explore comfortably.

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

The chart illustrates September temperature patterns in Truro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Truro, September typically has an average temperature of 19°C (66°F), with highs reaching up to 24°C (76°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec363638445161687065584840
Data source: Temperature data for Truro 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 Truro

In Truro in September, the precipitation amount is 110 mm (4.3 in) over a period of 10 days.

September Precipitation Trends in Truro

The chart displays monthly precipitation patterns in Truro, 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 Truro, September typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec95117119130106888474110161106138
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Truro

In Truro 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 Truro

This chart illustrates the average monthly humidity levels in Truro, 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 Truro is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Truro

In Truro 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 Truro.

Maximum UV Index Levels in Truro for September

The chart shows the monthly maximum UV Index (UVI) for Truro 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 Truro typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910998642
Data source: Truro 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 Truro Compares to Other Months

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

This table compares monthly weather conditions in Truro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)95 mm (3.7 inches)84%low
February Weather2°C (37°F)117 mm (4.6 inches)84%moderate
March Weather3°C (38°F)119 mm (4.7 inches)82%moderate
April Weather7°C (44°F)130 mm (5.1 inches)79%very high
May Weather11°C (51°F)106 mm (4.2 inches)75%very high
June Weather16°C (61°F)88 mm (3.5 inches)78%very high
July Weather20°C (69°F)84 mm (3.3 inches)76%very high
August Weather21°C (70°F)74 mm (2.9 inches)76%very high
September Weather19°C (66°F)110 mm (4.3 inches)75%very high
October Weather15°C (58°F)161 mm (6.3 inches)75%high
November Weather9°C (48°F)105 mm (4.2 inches)80%moderate
December Weather5°C (41°F)138 mm (5.4 inches)80%low

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