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September Weather in Mistissini, Canada

Last updated: June 18, 2025

In Mistissini, Canada, the average temperature for September hovers around 11°C (51°F), with a minimum dipping to -2°C (29°F) and a maximum reaching 24°C (76°F). Expect rainy days as precipitation levels accumulate to 151 mm (6.0 in) spread over 20 days. Additionally, the weather brings a high average humidity of 89%, contributing to a distinctly moist atmosphere.

September Temperature in Mistissini

In September in Mistissini, the average temperature is 11°C (51°F). The maximum can reach 24°C (76°F), while the minimum can be as low as -2°C (29°F). This varied climate makes it a perfect time for travelers to pack layers and enjoy outdoor activities in Mistissini.

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

The chart illustrates September temperature patterns in Mistissini, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mistissini, September typically has an average temperature of 11°C (51°F), with highs reaching up to 24°C (76°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec1214284051595951402510
Data source: Temperature data for Mistissini 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 Mistissini

In Mistissini in September, the total precipitation amount is 151 mm (6.0 in) spread over 20 days.

September Precipitation Trends in Mistissini

The chart displays monthly precipitation patterns in Mistissini, 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 Mistissini, September typically receives around 151 mm (6.0 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec48515564898210514815112912284
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mistissini

In Mistissini in September, humidity is 89%. With an average temperature of 11°C (51°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and every breath a little more laborious, creating a challenging environment for travelers.

September Average Humidity in Mistissini

This chart illustrates the average monthly humidity levels in Mistissini, 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 Mistissini is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%94%90%85%81%82%83%87%89%93%98%101%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mistissini

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

Maximum UV Index Levels in Mistissini for September

The chart shows the monthly maximum UV Index (UVI) for Mistissini 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 Mistissini typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235798876421
Data source: Mistissini 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 Mistissini Compares to Other Months

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

This table compares monthly weather conditions in Mistissini, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-17°C (1°F)48 mm (1.9 inches)98%low
February Weather-16°C (3°F)51 mm (2.0 inches)94%moderate
March Weather-10°C (14°F)55 mm (2.2 inches)90%moderate
April Weather-2°C (28°F)64 mm (2.5 inches)84%high
May Weather4°C (40°F)89 mm (3.5 inches)81%very high
June Weather11°C (52°F)82 mm (3.2 inches)82%very high
July Weather15°C (59°F)105 mm (4.1 inches)83%very high
August Weather15°C (60°F)148 mm (5.8 inches)86%high
September Weather11°C (51°F)151 mm (6.0 inches)89%high
October Weather5°C (40°F)129 mm (5.1 inches)93%moderate
November Weather-4°C (26°F)122 mm (4.8 inches)98%low
December Weather-12°C (10°F)84 mm (3.3 inches)101%low

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