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September Weather in Seaforth, Canada

Last updated: June 18, 2025

In September, the average temperature in Seaforth, Canada hovers around 17°C (63°F), with a minimum dipping to 3°C (37°F) and a maximum reaching up to 29°C (84°F). Expect 99 mm (3.9 in) of precipitation spread across 12 days, contributing to a high average humidity of 81%. Don't forget your umbrella!

September Temperature in Seaforth

In September in Seaforth, the average temperature is 17°C (63°F). Maximums can reach 29°C (84°F) and minimums can be as low as 3°C (37°F). This range makes Seaforth an ideal destination for travelers seeking enjoyable weather, whether for outdoor activities or exploring the local culture.

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

The chart illustrates September temperature patterns in Seaforth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seaforth, September typically has an average temperature of 17°C (63°F), with highs reaching up to 29°C (84°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec252632415364706963523831
Data source: Temperature data for Seaforth 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 Seaforth

In Seaforth in September, the total precipitation amount is 99 mm (3.9 in) recorded over a span of 12 days.

September Precipitation Trends in Seaforth

The chart displays monthly precipitation patterns in Seaforth, 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 Seaforth, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec8590781049791791159913611588
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Seaforth

In Seaforth in September humidity is 81%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making travel slightly oppressive and calling for frequent breaks in air-conditioned spaces to recharge and enjoy your journey comfortably.

September Average Humidity in Seaforth

This chart illustrates the average monthly humidity levels in Seaforth, 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 Seaforth is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%88%87%83%81%79%80%81%84%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Seaforth

In Seaforth in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Seaforth.

Maximum UV Index Levels in Seaforth for September

The chart shows the monthly maximum UV Index (UVI) for Seaforth 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 Seaforth typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Seaforth 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 Seaforth Compares to Other Months

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

This table compares monthly weather conditions in Seaforth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)85 mm (3.4 inches)90%low
February Weather-4°C (26°F)90 mm (3.5 inches)90%moderate
March Weather0°C (33°F)78 mm (3.1 inches)87%moderate
April Weather5°C (41°F)104 mm (4.1 inches)87%very high
May Weather12°C (53°F)97 mm (3.8 inches)82%very high
June Weather18°C (64°F)91 mm (3.6 inches)81%very high
July Weather21°C (70°F)79 mm (3.1 inches)79%very high
August Weather20°C (69°F)115 mm (4.5 inches)80%very high
September Weather17°C (63°F)99 mm (3.9 inches)81%high
October Weather11°C (52°F)136 mm (5.3 inches)84%moderate
November Weather3°C (38°F)115 mm (4.5 inches)88%moderate
December Weather0°C (32°F)88 mm (3.5 inches)87%low

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