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September Weather in East Gwillimbury, Canada

Last updated: June 18, 2025

In East Gwillimbury, Canada, the average temperature in September hovers around 16°C (62°F). Expect a range from a chilly 1°C (35°F) to a warm 33°C (91°F). During this month, you can anticipate about 64 mm (2.5 in) of precipitation over approximately 9 days, with an average humidity level of 76%. Stay prepared for a mix of weather as you enjoy your time here!

September Temperature in East Gwillimbury

In September in East Gwillimbury, the average temperature is 16°C (62°F), with maximums reaching up to 33°C (91°F) and minimums dropping as low as 1°C (35°F). Be sure to pack for a wide range of temperatures to enjoy your trip fully.

September Weather in East Gwillimbury: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in East Gwillimbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In East Gwillimbury, September typically has an average temperature of 16°C (62°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec222331425666716962503628
Data source: Temperature data for East Gwillimbury 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 East Gwillimbury

In East Gwillimbury in September, the precipitation amount is 64 mm (2.5 in) over a span of 9 days.

September Precipitation Trends in East Gwillimbury

The chart displays monthly precipitation patterns in East Gwillimbury, 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 East Gwillimbury, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec60616010399949897641007467
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in East Gwillimbury

In East Gwillimbury in September, humidity is 76%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that makes exploring the outdoors feel both refreshing and slightly muggy, urging travelers to take breaks often and enjoy the shade.

September Average Humidity in East Gwillimbury

This chart illustrates the average monthly humidity levels in East Gwillimbury, 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 East Gwillimbury is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in East Gwillimbury

In East Gwillimbury 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 East Gwillimbury.

Maximum UV Index Levels in East Gwillimbury for September

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

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

This table compares monthly weather conditions in East Gwillimbury, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)60 mm (2.4 inches)91%low
February Weather-5°C (23°F)61 mm (2.4 inches)91%moderate
March Weather0°C (32°F)60 mm (2.4 inches)88%moderate
April Weather6°C (42°F)103 mm (4.1 inches)88%very high
May Weather13°C (56°F)99 mm (3.9 inches)82%very high
June Weather19°C (66°F)94 mm (3.7 inches)79%very high
July Weather22°C (72°F)98 mm (3.9 inches)77%very high
August Weather21°C (69°F)97 mm (3.8 inches)72%very high
September Weather16°C (62°F)64 mm (2.5 inches)76%high
October Weather10°C (50°F)100 mm (3.9 inches)83%moderate
November Weather2°C (36°F)74 mm (2.9 inches)88%moderate
December Weather-2°C (28°F)67 mm (2.6 inches)87%low

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