September is one of the warmer months of the year in Saskatoon, with average highs near 19.4°C and lows around 6.7°C (mean 13.1°C). It is about average for rainfall, averaging 38 mm of rainfall and 61% relative humidity across the period.
September is one of the warmer months of the year in Saskatoon. Across 45 years of records, the warmest Septembers in Saskatoon were 2009 and 2024 — when the month averaged 17.4°C — while the coldest was 2018 at 8.4°C. Typical September days reach 19.4°C with nights near 6.7°C. The long-term trend is warming, about 0.7°C per decade.
September is about average for rainfall in Saskatoon, averaging 38 mm of rainfall. The wettest Septembers on record were 2005 and 2006 with 97 mm, while the driest was 1990 at 5 mm.
Relative humidity in Saskatoon during September averages 61%. The most humid September was 2010 at 74%, and the least humid was 1990 at 51%.
September receives about 3.6 kWh/m²/day of solar energy in Saskatoon. The sunniest Septembers were 1995 and 2011 at 4.3 kWh/m²/day, and the cloudiest was 2018 at 2.8.
Average wind speed in Saskatoon during September is 3.1 m/s. The windiest September was 1997 at 3.6 m/s, while the calmest was 2023 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.6°C | 13.0°C | 13.0°C | 12.9°C | 15.6°C | +4°C |
| Avg High | 17.8°C | 19.6°C | 19.4°C | 19.2°C | 22.1°C | +4.3°C |
| Avg Low | 5.4°C | 6.5°C | 6.6°C | 6.6°C | 9.1°C | +3.7°C |
| Avg Rain | 42 mm | 26 mm | 47 mm | 40 mm | 35 mm | -7 mm |
September temperatures in Saskatoon have risen by about 5.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -6.1°C (2018) to a record high of 34.4°C (2022).
Rainfall in September is about average for rainfall, averaging 38 mm, with a wettest year of 97 mm.
One of the best times to visit Saskatoon
September is one of the best times to visit Saskatoon. Expect days averaging 19.4°C and nights around 6.7°C (mean 13.1°C) — warmer than Saskatoon's yearly average — with moderate rainfall (38 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.5°C | 17.0°C | 10.4°C | 29.7°C | 4.6°C | 35 mm | 60% | 2.8 m/s | 3.8 |
| 2024 | 23.8°C | 17.4°C | 10.9°C | 34.2°C | 5.1°C | 38 mm | 59% | 3.2 m/s | 3.5 |
| 2023 | 22.6°C | 16.3°C | 10.0°C | 29.0°C | 4.6°C | 32 mm | 59% | 2.6 m/s | 3.8 |
| 2022 | 22.8°C | 16.1°C | 9.5°C | 34.4°C | 2.5°C | 24 mm | 56% | 3.1 m/s | 3.9 |
| 2021 | 21.4°C | 14.6°C | 7.9°C | 29.6°C | 0.7°C | 33 mm | 60% | 3.2 m/s | 3.9 |
| 2020 | 18.2°C | 12.1°C | 6.0°C | 29.6°C | -1.5°C | 48 mm | 66% | 3.4 m/s | 3.4 |
| 2019 | 18.1°C | 12.8°C | 7.5°C | 28.7°C | -4.1°C | 73 mm | 71% | 2.9 m/s | 3.2 |
| 2018 ❄️ | 13.9°C | 8.4°C | 3.0°C | 24.7°C | -6.1°C | 45 mm | 67% | 3.1 m/s | 2.8 |
| 2017 | 20.0°C | 13.5°C | 7.0°C | 31.1°C | 1.4°C | 35 mm | 58% | 2.8 m/s | 3.7 |
| 2016 | 19.6°C | 13.2°C | 6.8°C | 30.0°C | 0.6°C | 25 mm | 63% | 2.9 m/s | 3.6 |
| 2015 | 19.4°C | 13.0°C | 6.7°C | 28.7°C | -1.6°C | 40 mm | 64% | 2.8 m/s | 3.5 |
| 2014 | 19.2°C | 12.6°C | 6.1°C | 28.4°C | -1.4°C | 24 mm | 65% | 2.9 m/s | 3.7 |
| 2013 | 22.2°C | 15.7°C | 9.2°C | 32.4°C | 2.5°C | 36 mm | 59% | 3 m/s | 4.1 |
| 2012 | 21.0°C | 14.0°C | 7.1°C | 28.9°C | 2.6°C | 12 mm | 56% | 3.2 m/s | 4 |
| 2011 | 22.6°C | 15.3°C | 8.0°C | 31.0°C | -0.5°C | 28 mm | 58% | 2.7 m/s | 4.3 |
| 2010 | 16.1°C | 10.6°C | 5.0°C | 24.6°C | -3.0°C | 80 mm | 74% | 2.9 m/s | 3.2 |
| 2009 🔥 | 24.4°C | 17.4°C | 10.5°C | 33.6°C | 3.0°C | 38 mm | 56% | 3.4 m/s | 4 |
| 2008 | 19.7°C | 12.9°C | 6.0°C | 27.8°C | 1.5°C | 11 mm | 61% | 2.9 m/s | 3.8 |
| 2007 | 18.1°C | 11.8°C | 5.4°C | 29.1°C | -0.7°C | 29 mm | 64% | 3 m/s | 3.5 |
| 2006 | 18.2°C | 12.4°C | 6.5°C | 29.8°C | 0.3°C | 97 mm | 70% | 3 m/s | 3.4 |
| 2005 🌧️ | 18.0°C | 12.0°C | 6.0°C | 28.5°C | -1.2°C | 97 mm | 72% | 2.9 m/s | 3.6 |
| 2004 | 18.3°C | 12.1°C | 6.0°C | 24.8°C | -3.2°C | 36 mm | 68% | 2.7 m/s | 3.4 |
| 2003 | 17.8°C | 11.7°C | 5.6°C | 30.3°C | -2.7°C | 43 mm | 63% | 3.3 m/s | 3.4 |
| 2002 | 18.1°C | 12.1°C | 6.0°C | 28.2°C | -5.5°C | 74 mm | 62% | 3.2 m/s | 3.5 |
| 2001 | 22.3°C | 15.2°C | 8.2°C | 30.5°C | 3.3°C | 9 mm | 52% | 3.1 m/s | 4.2 |
| 2000 | 18.8°C | 12.3°C | 5.8°C | 28.8°C | -3.9°C | 40 mm | 62% | 3.3 m/s | 3.5 |
| 1999 | 17.8°C | 11.4°C | 5.0°C | 27.4°C | -4.0°C | 10 mm | 56% | 3 m/s | 3.9 |
| 1998 | 20.8°C | 14.2°C | 7.6°C | 30.0°C | -1.7°C | 37 mm | 55% | 2.8 m/s | 3.9 |
| 1997 | 22.3°C | 15.2°C | 8.2°C | 30.4°C | -1.4°C | 24 mm | 56% | 3.6 m/s | 3.8 |
| 1996 | 16.9°C | 11.6°C | 6.3°C | 25.2°C | -3.1°C | 58 mm | 63% | 3.4 m/s | 3 |
| 1995 | 19.9°C | 13.2°C | 6.5°C | 30.5°C | -4.6°C | 10 mm | 54% | 2.7 m/s | 4.3 |
| 1994 | 22.1°C | 15.3°C | 8.6°C | 29.5°C | 2.7°C | 13 mm | 54% | 2.8 m/s | 3.8 |
| 1993 | 17.4°C | 10.9°C | 4.4°C | 24.8°C | -2.6°C | 42 mm | 64% | 3.3 m/s | 3.7 |
| 1992 | 16.6°C | 10.2°C | 3.8°C | 25.8°C | -2.0°C | 44 mm | 60% | 3.3 m/s | 3.2 |
| 1991 | 19.4°C | 12.8°C | 6.1°C | 31.1°C | -3.4°C | 17 mm | 55% | 3.4 m/s | 3.8 |
| 1990 | 22.6°C | 15.3°C | 8.1°C | 30.8°C | 2.6°C | 5 mm | 51% | 3.1 m/s | 4.1 |
| 1989 | 18.6°C | 12.2°C | 5.9°C | 26.3°C | -0.8°C | 36 mm | 61% | 3.2 m/s | 3.9 |
| 1988 | 18.7°C | 12.4°C | 6.0°C | 34.3°C | -0.6°C | 29 mm | 57% | 3.3 m/s | 3.4 |
| 1987 | 21.9°C | 14.9°C | 8.0°C | 33.0°C | 4.2°C | 14 mm | 57% | 2.8 m/s | 3.9 |
| 1986 | 15.7°C | 10.2°C | 4.7°C | 22.3°C | -0.6°C | 65 mm | 66% | 2.8 m/s | 3 |
| 1985 | 15.0°C | 9.0°C | 3.1°C | 22.9°C | -4.8°C | 29 mm | 61% | 3.3 m/s | 3.4 |
| 1984 | 14.8°C | 8.8°C | 2.9°C | 31.1°C | -4.2°C | 73 mm | 63% | 2.9 m/s | 3.3 |
| 1983 | 16.0°C | 10.5°C | 4.9°C | 32.5°C | -3.2°C | 69 mm | 62% | 3.4 m/s | — |
| 1982 | 18.2°C | 12.0°C | 5.8°C | 29.3°C | -3.8°C | 38 mm | 60% | 3.1 m/s | — |
| 1981 | 21.3°C | 14.4°C | 7.4°C | 31.8°C | 1.1°C | 24 mm | 52% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 19.4°C with lows near 6.7°C (mean 13.1°C), based on 45 years of NASA POWER data.
September averages 38 mm of rainfall in Saskatoon, about average for rainfall. The wettest on record was 97 mm in 2005.
The hottest September reached 34.4°C in 2022. The coldest dipped to -6.1°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.4°C. Daytime highs moved from 17.1°C to 22.8°C and overnight lows from 4.8°C to 9.7°C over the same span.
September is one of the warmer months of the year in Saskatoon and about average for rainfall, so plan for around 19.4°C daytime highs and 6.7°C at night.
Not quite — September is the 9th coolest month in Saskatoon, averaging 13.1°C.
For September in Saskatoon, pack warm layers and a jacket for chilly mornings, with typical highs of 19.4°C and lows of 6.7°C.
Relative humidity in September averages 61% — moderately humid.
Average wind speed in September is 3.1 m/s. The windiest September on record averaged 3.6 m/s (1997).
The wettest September on record was 2005 with 97 mm. On average, September sees 38 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Saskatoon behaves each September, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for September specifically, along with year-by-year records and how the month has changed over the decades.
