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September Weather in Gander, Canada

Last updated: June 18, 2025

The average temperature in Gander, Canada during September is a comfortable 13°C (55°F). Expect temperatures to range from a chilly 1°C (34°F) to a warm 26°C (80°F). This month, you can anticipate 99 mm (3.9 in) of precipitation spread over 13 days, contributing to an average humidity of 88%.

September Temperature in Gander

In September in Gander, the average temperature is 13°C (55°F). The maximum can reach 26°C (80°F), and the minimum can be as low as 1°C (34°F). Be sure to pack layers to comfortably enjoy the varied temperatures during your travels.

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

The chart illustrates September temperature patterns in Gander, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gander, September typically has an average temperature of 13°C (55°F), with highs reaching up to 26°C (80°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec242127364354626455453729
Data source: Temperature data for Gander 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 Gander

In Gander in September, the precipitation amount is 99 mm (3.9 in) over the course of 13 days.

September Precipitation Trends in Gander

The chart displays monthly precipitation patterns in Gander, 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 Gander, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec8095108114938779819997102124
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Gander

In Gander in September humidity is 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience for traveling.

September Average Humidity in Gander

This chart illustrates the average monthly humidity levels in Gander, 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 Gander is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%87%88%90%89%86%89%90%88%87%85%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gander

In Gander in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Gander, you can refer to this Hourly UV Index in Gander.

Maximum UV Index Levels in Gander for September

The chart shows the monthly maximum UV Index (UVI) for Gander 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 Gander typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356810886421
Data source: Gander 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 Gander Compares to Other Months

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

This table compares monthly weather conditions in Gander, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)80 mm (3.2 inches)85%low
February Weather-6°C (22°F)95 mm (3.7 inches)87%moderate
March Weather-3°C (27°F)108 mm (4.2 inches)88%moderate
April Weather2°C (36°F)114 mm (4.5 inches)90%high
May Weather6°C (43°F)93 mm (3.7 inches)89%very high
June Weather12°C (54°F)87 mm (3.4 inches)86%very high
July Weather17°C (62°F)79 mm (3.1 inches)89%very high
August Weather18°C (64°F)81 mm (3.2 inches)90%very high
September Weather13°C (55°F)99 mm (3.9 inches)88%high
October Weather7°C (45°F)97 mm (3.8 inches)87%moderate
November Weather3°C (37°F)102 mm (4.0 inches)85%low
December Weather-2°C (29°F)124 mm (4.9 inches)85%low

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