September is one of the warmer months of the year in Swift Current, with average highs near 20.1°C and lows around 7.2°C (mean 13.7°C). It is about average for rainfall, averaging 34 mm of rainfall and 58% relative humidity across the period.
September is one of the warmer months of the year in Swift Current. Across 45 years of records, the warmest September in Swift Current was 2025 — when the month averaged 18°C — while the coldest was 1985 at 8.9°C. Typical September days reach 20.1°C with nights near 7.2°C. The long-term trend is warming, about 0.9°C per decade.
September is about average for rainfall in Swift Current, averaging 34 mm of rainfall. The wettest September on record was 1986 with 95 mm, while the driest was 1990 at 3 mm.
Relative humidity in Swift Current during September averages 58%. The most humid September was 2010 at 69%, and the least humid was 1990 at 48%.
September receives about 3.9 kWh/m²/day of solar energy in Swift Current. The sunniest September was 1990 at 4.7 kWh/m²/day, and the cloudiest was 2018 at 3.
Average wind speed in Swift Current during September is 3.3 m/s. The windiest September was 2020 at 3.9 m/s, while the calmest was 1995 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.9°C | 13.5°C | 13.6°C | 13.7°C | 16.5°C | +4.6°C |
| Avg High | 18.0°C | 20.1°C | 20.2°C | 20.0°C | 23.2°C | +5.2°C |
| Avg Low | 5.7°C | 6.9°C | 7.1°C | 7.3°C | 9.9°C | +4.2°C |
| Avg Rain | 41 mm | 30 mm | 37 mm | 35 mm | 20 mm | -21 mm |
September temperatures in Swift Current have risen by about 5.8°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -5.8°C (2018) to a record high of 35.6°C (1983).
Rainfall in September is about average for rainfall, averaging 34 mm, with a wettest year of 95 mm.
One of the best times to visit Swift Current
September is one of the best times to visit Swift Current. Expect days averaging 20.1°C and nights around 7.2°C (mean 13.7°C) — warmer than Swift Current's yearly average — with moderate rainfall (34 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 🔥 | 24.9°C | 18.0°C | 11.1°C | 31.1°C | 4.7°C | 10 mm | 54% | 3 m/s | 4.2 |
| 2024 | 24.1°C | 17.8°C | 11.5°C | 33.7°C | 6.1°C | 47 mm | 56% | 3.6 m/s | 3.7 |
| 2023 | 23.4°C | 17.0°C | 10.6°C | 32.0°C | 6.0°C | 21 mm | 53% | 3 m/s | 4.1 |
| 2022 | 24.3°C | 17.3°C | 10.4°C | 35.5°C | 2.9°C | 8 mm | 50% | 3.4 m/s | 4 |
| 2021 | 22.3°C | 15.5°C | 8.6°C | 30.2°C | 2.1°C | 10 mm | 52% | 3.5 m/s | 4.4 |
| 2020 | 19.9°C | 13.5°C | 7.1°C | 32.4°C | -1.3°C | 24 mm | 59% | 3.9 m/s | 3.7 |
| 2019 | 18.9°C | 13.6°C | 8.2°C | 29.9°C | -2.9°C | 75 mm | 69% | 3.3 m/s | 3.5 |
| 2018 | 15.8°C | 10.1°C | 4.4°C | 29.5°C | -5.8°C | 34 mm | 64% | 3.1 m/s | 3 |
| 2017 | 20.6°C | 14.0°C | 7.5°C | 32.1°C | 1.2°C | 8 mm | 54% | 2.9 m/s | 3.9 |
| 2016 | 19.7°C | 13.5°C | 7.3°C | 30.7°C | 0.6°C | 32 mm | 62% | 2.9 m/s | 3.7 |
| 2015 | 20.0°C | 13.7°C | 7.4°C | 30.1°C | 2.8°C | 40 mm | 61% | 3.2 m/s | 3.8 |
| 2014 | 19.6°C | 13.1°C | 6.6°C | 31.0°C | -1.9°C | 35 mm | 63% | 3.1 m/s | 3.9 |
| 2013 | 22.1°C | 15.8°C | 9.6°C | 33.8°C | 2.0°C | 53 mm | 58% | 3.5 m/s | 3.9 |
| 2012 | 22.2°C | 15.0°C | 7.9°C | 30.6°C | 3.3°C | 9 mm | 49% | 3.4 m/s | 4.3 |
| 2011 | 23.7°C | 16.2°C | 8.7°C | 31.6°C | -0.8°C | 6 mm | 50% | 3.3 m/s | 4.6 |
| 2010 | 17.5°C | 11.6°C | 5.6°C | 28.5°C | -2.9°C | 61 mm | 69% | 3.4 m/s | 3.4 |
| 2009 | 24.8°C | 17.7°C | 10.5°C | 34.6°C | 2.2°C | 28 mm | 51% | 3.8 m/s | 4.4 |
| 2008 | 20.0°C | 13.1°C | 6.3°C | 27.7°C | 2.6°C | 21 mm | 61% | 3 m/s | 4 |
| 2007 | 19.3°C | 12.6°C | 6.0°C | 32.8°C | -0.2°C | 25 mm | 58% | 3.5 m/s | 3.6 |
| 2006 | 19.4°C | 13.2°C | 7.1°C | 30.9°C | -0.7°C | 75 mm | 64% | 3.3 m/s | 3.6 |
| 2005 | 19.3°C | 13.0°C | 6.6°C | 30.5°C | -0.7°C | 54 mm | 64% | 3.2 m/s | 4.1 |
| 2004 | 19.3°C | 12.8°C | 6.4°C | 27.7°C | -2.7°C | 29 mm | 63% | 3 m/s | 4.1 |
| 2003 | 18.8°C | 12.3°C | 5.7°C | 32.3°C | -3.6°C | 40 mm | 59% | 3.4 m/s | 3.7 |
| 2002 | 19.0°C | 12.8°C | 6.7°C | 30.6°C | -2.2°C | 55 mm | 62% | 3.4 m/s | 4 |
| 2001 | 22.8°C | 15.8°C | 8.8°C | 32.4°C | 3.9°C | 7 mm | 50% | 3.2 m/s | 4.3 |
| 2000 | 19.3°C | 12.8°C | 6.4°C | 30.5°C | -4.4°C | 41 mm | 59% | 3.6 m/s | 3.8 |
| 1999 | 17.7°C | 11.5°C | 5.3°C | 27.8°C | -3.6°C | 5 mm | 53% | 3.4 m/s | 4.1 |
| 1998 | 22.8°C | 15.8°C | 8.7°C | 32.6°C | -0.6°C | 28 mm | 51% | 3 m/s | 4.1 |
| 1997 | 22.8°C | 15.8°C | 8.9°C | 29.6°C | -0.8°C | 11 mm | 50% | 3.7 m/s | 4.2 |
| 1996 | 16.9°C | 11.5°C | 6.1°C | 26.7°C | -0.2°C | 64 mm | 65% | 3.5 m/s | 3.2 |
| 1995 | 19.3°C | 12.9°C | 6.5°C | 31.2°C | -4.8°C | 60 mm | 56% | 2.7 m/s | 4.4 |
| 1994 | 23.1°C | 16.1°C | 9.1°C | 31.3°C | 3.3°C | 13 mm | 51% | 3.2 m/s | 4.2 |
| 1993 | 17.1°C | 10.6°C | 4.2°C | 25.2°C | -2.6°C | 56 mm | 65% | 3.6 m/s | 4.2 |
| 1992 | 17.6°C | 11.1°C | 4.5°C | 29.4°C | -1.2°C | 40 mm | 59% | 3.5 m/s | 3.7 |
| 1991 | 19.6°C | 13.1°C | 6.6°C | 31.4°C | -3.0°C | 17 mm | 55% | 3.5 m/s | 3.9 |
| 1990 | 23.6°C | 16.1°C | 8.7°C | 32.0°C | 1.2°C | 3 mm | 48% | 3.1 m/s | 4.7 |
| 1989 | 18.7°C | 12.2°C | 5.8°C | 26.5°C | -1.1°C | 38 mm | 61% | 3.5 m/s | 4.2 |
| 1988 | 19.3°C | 12.9°C | 6.4°C | 34.6°C | 1.3°C | 42 mm | 54% | 3.6 m/s | 3.6 |
| 1987 | 22.3°C | 15.3°C | 8.3°C | 33.4°C | 3.8°C | 8 mm | 53% | 3.2 m/s | 4.1 |
| 1986 🌧️ | 14.8°C | 9.7°C | 4.6°C | 23.6°C | -0.3°C | 95 mm | 68% | 3.4 m/s | 3.1 |
| 1985 ❄️ | 14.5°C | 8.9°C | 3.3°C | 24.4°C | -5.1°C | 36 mm | 63% | 3.8 m/s | 3.2 |
| 1984 | 15.2°C | 9.2°C | 3.2°C | 30.3°C | -5.1°C | 56 mm | 60% | 3.1 m/s | 3.3 |
| 1983 | 17.0°C | 11.2°C | 5.5°C | 35.6°C | -4.3°C | 40 mm | 58% | 3.8 m/s | — |
| 1982 | 18.5°C | 12.3°C | 6.0°C | 30.5°C | -3.2°C | 35 mm | 60% | 3.4 m/s | — |
| 1981 | 21.9°C | 15.0°C | 8.1°C | 32.5°C | 1.2°C | 20 mm | 49% | 3.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20.1°C with lows near 7.2°C (mean 13.7°C), based on 45 years of NASA POWER data.
September averages 34 mm of rainfall in Swift Current, about average for rainfall. The wettest on record was 95 mm in 1986.
The hottest September reached 35.6°C in 1983. The coldest dipped to -5.8°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.8°C. Daytime highs moved from 17.4°C to 23.8°C and overnight lows from 5.2°C to 10.4°C over the same span.
September is one of the warmer months of the year in Swift Current and about average for rainfall, so plan for around 20.1°C daytime highs and 7.2°C at night.
Not quite — September is the 9th coolest month in Swift Current, averaging 13.7°C.
For September in Swift Current, pack warm layers and a jacket for chilly mornings, with typical highs of 20.1°C and lows of 7.2°C.
Relative humidity in September averages 58% — moderately humid.
Average wind speed in September is 3.3 m/s. The windiest September on record averaged 3.9 m/s (2020).
The wettest September on record was 1986 with 95 mm. On average, September sees 34 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 Swift Current 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.
