nomadseason

September Weather in Deer Lake, Canada

Last updated: June 18, 2025

In Deer Lake, Canada, the average temperature in September hovers around 12°C (54°F). Expect minimums to dip to -1°C (31°F) and highs reaching up to 24°C (75°F). During this month, precipitation averages 125 mm (4.9 in) over 16 days, accompanied by a notable average humidity of 87%. Stay prepared for a mix of cool and warm weather!

September Temperature in Deer Lake

In September in Deer Lake, the average temperature is 12°C (54°F). Maximum temperatures can reach up to 24°C (75°F), while minimums can drop as low as -1°C (31°F). This diverse temperature range makes it advisable for travelers to pack both warm and light layers when visiting during this month.

September Weather in Deer Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Deer Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deer Lake, September typically has an average temperature of 12°C (54°F), with highs reaching up to 24°C (75°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec201824344353606253443527
Data source: Temperature data for Deer Lake generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Deer Lake

In Deer Lake in September, the precipitation amount is 125 mm (4.9 in) spread over 16 days.

September Precipitation Trends in Deer Lake

The chart displays monthly precipitation patterns in Deer Lake, 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 Deer Lake, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec961181061109910181111125130154144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Deer Lake

In Deer Lake in September humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.

September Average Humidity in Deer Lake

This chart illustrates the average monthly humidity levels in Deer Lake, 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 Deer Lake is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%90%89%88%87%85%90%90%87%84%83%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Deer Lake

In Deer Lake 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 Deer Lake, you can refer to this Hourly UV Index in Deer Lake.

Maximum UV Index Levels in Deer Lake for September

The chart shows the monthly maximum UV Index (UVI) for Deer Lake 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 Deer Lake typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789886421
Data source: Deer Lake 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 Deer Lake Compares to Other Months

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

This table compares monthly weather conditions in Deer Lake, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)96 mm (3.8 inches)88%low
February Weather-8°C (18°F)118 mm (4.6 inches)90%moderate
March Weather-4°C (24°F)106 mm (4.2 inches)89%moderate
April Weather1°C (34°F)109 mm (4.3 inches)88%high
May Weather6°C (43°F)99 mm (3.9 inches)87%very high
June Weather12°C (53°F)101 mm (4.0 inches)85%very high
July Weather16°C (61°F)81 mm (3.2 inches)90%very high
August Weather17°C (62°F)111 mm (4.4 inches)90%very high
September Weather12°C (54°F)125 mm (4.9 inches)87%high
October Weather6°C (44°F)130 mm (5.1 inches)84%moderate
November Weather2°C (35°F)154 mm (6.1 inches)83%low
December Weather-3°C (27°F)144 mm (5.7 inches)85%low

Compare Deer Lake's Climate with Cities Worldwide