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September Weather in Yarmouth, Canada

Last updated: June 18, 2025

In Yarmouth, Canada, the average temperature in September is a comfortable 15°C (60°F), with a minimum dipping to 9°C (48°F) and a maximum reaching 20°C (69°F). Expect about 112 mm (4.4 in) of precipitation over approximately 8 days, accompanied by an average humidity of 83%. Enjoy the mild climate!

September Temperature in Yarmouth

In September in Yarmouth, the average temperature is 15°C (60°F). Maximums can reach 20°C (69°F), while minimums can be as low as 9°C (48°F). This moderate climate makes it an ideal time for sightseeing and outdoor activities.

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

The chart illustrates September temperature patterns in Yarmouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yarmouth, September typically has an average temperature of 15°C (60°F), with highs reaching up to 20°C (69°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec333234414854606260544537
Data source: Temperature data for Yarmouth 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 Yarmouth

In Yarmouth in September, the total precipitation amount is 112 mm (4.4 in) spread over 8 days.

September Precipitation Trends in Yarmouth

The chart displays monthly precipitation patterns in Yarmouth, 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 Yarmouth, September typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec109137128139126119106106112133164171
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yarmouth

In Yarmouth in September humidity is 83%. With an average temperature of 15°C (60°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable and sticky, as the air clings to your skin and dampens your clothes.

September Average Humidity in Yarmouth

This chart illustrates the average monthly humidity levels in Yarmouth, 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 Yarmouth is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%84%80%82%89%89%85%83%78%80%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yarmouth

In Yarmouth 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 Yarmouth.

Maximum UV Index Levels in Yarmouth for September

The chart shows the monthly maximum UV Index (UVI) for Yarmouth 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 Yarmouth typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910998532
Data source: Yarmouth 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 Yarmouth Compares to Other Months

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

This table compares monthly weather conditions in Yarmouth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)109 mm (4.3 inches)85%low
February Weather0°C (32°F)137 mm (5.4 inches)86%moderate
March Weather1°C (34°F)128 mm (5.0 inches)84%moderate
April Weather5°C (41°F)139 mm (5.5 inches)80%very high
May Weather9°C (48°F)126 mm (5.0 inches)82%very high
June Weather12°C (55°F)119 mm (4.7 inches)89%very high
July Weather16°C (60°F)106 mm (4.2 inches)89%very high
August Weather17°C (63°F)105 mm (4.2 inches)85%very high
September Weather15°C (60°F)112 mm (4.4 inches)83%very high
October Weather12°C (55°F)133 mm (5.3 inches)78%moderate
November Weather7°C (46°F)164 mm (6.4 inches)80%moderate
December Weather3°C (37°F)171 mm (6.7 inches)81%low

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