September is one of the warmer months of the year in Weyburn, with average highs near 20.8°C and lows around 7.5°C (mean 14.2°C). It is about average for rainfall, averaging 36 mm of rainfall and 59% relative humidity across the period.
September is one of the warmer months of the year in Weyburn. Across 45 years of records, the warmest September in Weyburn was 2024 — when the month averaged 18.7°C — while the coldest was 1985 at 9.5°C. Typical September days reach 20.8°C with nights near 7.5°C. The long-term trend is warming, about 0.8°C per decade.
September is about average for rainfall in Weyburn, averaging 36 mm of rainfall. The wettest September on record was 2019 with 132 mm, while the driest was 2012 at 3 mm.
Relative humidity in Weyburn during September averages 59%. The most humid September was 2019 at 74%, and the least humid was 1990 at 48%.
September receives about 4 kWh/m²/day of solar energy in Weyburn. The sunniest Septembers were 2009, 2011 and 2012 at 4.6 kWh/m²/day, and the cloudiest was 1986 at 3.1.
Average wind speed in Weyburn during September is 3.2 m/s. The windiest September was 2020 at 4 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 | 12.4°C | 14.1°C | 14.2°C | 14.1°C | 16.8°C | +4.4°C |
| Avg High | 18.9°C | 20.9°C | 21.1°C | 20.5°C | 23.8°C | +4.9°C |
| Avg Low | 6.0°C | 7.2°C | 7.4°C | 7.7°C | 9.9°C | +3.9°C |
| Avg Rain | 44 mm | 29 mm | 26 mm | 53 mm | 24 mm | -19 mm |
September temperatures in Weyburn have risen by about 5.5°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -5.2°C (1995) to a record high of 36.2°C (1998).
Rainfall in September is about average for rainfall, averaging 36 mm, with a wettest year of 132 mm.
One of the best times to visit Weyburn
September is one of the best times to visit Weyburn. Expect days averaging 20.8°C and nights around 7.5°C (mean 14.2°C) — warmer than Weyburn's yearly average — with moderate rainfall (36 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 | 23.6°C | 17.3°C | 11.1°C | 31.6°C | 4.5°C | 48 mm | 64% | 2.8 m/s | 3.8 |
| 2024 🔥 | 26.0°C | 18.7°C | 11.4°C | 33.3°C | 5.4°C | 44 mm | 56% | 3.5 m/s | 4 |
| 2023 | 24.2°C | 17.5°C | 10.8°C | 35.2°C | 6.9°C | 22 mm | 59% | 2.9 m/s | 3.9 |
| 2022 | 23.7°C | 16.8°C | 9.9°C | 34.3°C | 3.1°C | 9 mm | 54% | 3.4 m/s | 4.1 |
| 2021 | 24.3°C | 16.8°C | 9.2°C | 33.0°C | 3.0°C | 9 mm | 50% | 3.1 m/s | 4.3 |
| 2020 | 20.7°C | 13.8°C | 7.0°C | 31.4°C | -1.8°C | 12 mm | 55% | 4 m/s | 4 |
| 2019 🌧️ | 18.8°C | 13.6°C | 8.4°C | 31.3°C | -1.1°C | 132 mm | 74% | 3.2 m/s | 3.2 |
| 2018 | 16.9°C | 11.0°C | 5.1°C | 30.9°C | -4.6°C | 39 mm | 63% | 3.1 m/s | 3.4 |
| 2017 | 21.1°C | 14.5°C | 7.9°C | 33.4°C | 1.1°C | 29 mm | 56% | 3.2 m/s | 3.6 |
| 2016 | 20.1°C | 14.1°C | 8.0°C | 32.2°C | -0.7°C | 68 mm | 65% | 3.1 m/s | 3.5 |
| 2015 | 22.5°C | 15.4°C | 8.4°C | 34.6°C | 2.4°C | 68 mm | 60% | 3.2 m/s | 4.1 |
| 2014 | 20.3°C | 13.5°C | 6.8°C | 32.0°C | -2.4°C | 40 mm | 64% | 3.2 m/s | 4 |
| 2013 | 22.9°C | 16.5°C | 10.0°C | 33.3°C | 2.0°C | 42 mm | 60% | 3.1 m/s | 3.8 |
| 2012 | 22.7°C | 15.3°C | 7.9°C | 31.8°C | -0.5°C | 3 mm | 49% | 3.2 m/s | 4.6 |
| 2011 | 22.2°C | 15.2°C | 8.3°C | 29.4°C | -1.9°C | 21 mm | 61% | 3 m/s | 4.6 |
| 2010 | 17.6°C | 11.9°C | 6.2°C | 29.0°C | -2.7°C | 84 mm | 73% | 3.2 m/s | 3.5 |
| 2009 | 25.2°C | 18.0°C | 10.7°C | 33.1°C | 2.9°C | 19 mm | 57% | 3.4 m/s | 4.6 |
| 2008 | 19.7°C | 13.0°C | 6.3°C | 27.6°C | 2.1°C | 63 mm | 65% | 3 m/s | 4 |
| 2007 | 20.5°C | 13.6°C | 6.7°C | 31.1°C | -1.9°C | 21 mm | 59% | 3.3 m/s | 4.1 |
| 2006 | 19.9°C | 13.4°C | 6.9°C | 30.3°C | -1.1°C | 56 mm | 64% | 3.1 m/s | 4 |
| 2005 | 21.4°C | 14.4°C | 7.5°C | 32.6°C | 0.6°C | 14 mm | 61% | 3.1 m/s | 4.3 |
| 2004 | 21.5°C | 14.5°C | 7.5°C | 32.6°C | -0.1°C | 12 mm | 59% | 2.8 m/s | 3.9 |
| 2003 | 19.8°C | 13.1°C | 6.5°C | 35.4°C | -3.4°C | 13 mm | 55% | 3.5 m/s | 3.8 |
| 2002 | 21.3°C | 14.1°C | 6.9°C | 31.1°C | -1.6°C | 27 mm | 59% | 3.5 m/s | 4.2 |
| 2001 | 22.5°C | 15.2°C | 7.9°C | 32.1°C | 1.1°C | 12 mm | 53% | 3 m/s | 4.1 |
| 2000 | 19.5°C | 13.0°C | 6.6°C | 30.1°C | -4.0°C | 24 mm | 60% | 3.4 m/s | 3.6 |
| 1999 | 17.9°C | 11.5°C | 5.0°C | 28.3°C | -2.3°C | 27 mm | 59% | 3.3 m/s | 3.8 |
| 1998 | 23.7°C | 16.3°C | 8.8°C | 36.2°C | 0.0°C | 28 mm | 52% | 3.1 m/s | 4.2 |
| 1997 | 23.2°C | 16.1°C | 8.9°C | 30.0°C | 1.0°C | 26 mm | 53% | 3.6 m/s | 4.3 |
| 1996 | 18.9°C | 13.1°C | 7.2°C | 26.5°C | -0.2°C | 41 mm | 60% | 3.6 m/s | 3.6 |
| 1995 | 19.7°C | 13.1°C | 6.5°C | 30.8°C | -5.2°C | 44 mm | 57% | 2.7 m/s | 4.4 |
| 1994 | 23.4°C | 16.2°C | 9.0°C | 32.4°C | 3.3°C | 18 mm | 53% | 3 m/s | 4.4 |
| 1993 | 18.0°C | 11.4°C | 4.7°C | 28.2°C | -0.6°C | 22 mm | 62% | 3.5 m/s | 3.9 |
| 1992 | 19.8°C | 12.9°C | 5.9°C | 30.6°C | -1.6°C | 18 mm | 54% | 3.5 m/s | 4 |
| 1991 | 19.8°C | 13.4°C | 7.1°C | 34.8°C | -3.2°C | 56 mm | 59% | 3.5 m/s | 3.9 |
| 1990 | 24.3°C | 16.7°C | 9.0°C | 33.6°C | 0.4°C | 9 mm | 48% | 3.1 m/s | 4.5 |
| 1989 | 20.9°C | 13.8°C | 6.7°C | 28.9°C | -0.6°C | 21 mm | 54% | 3.5 m/s | 4.4 |
| 1988 | 19.8°C | 12.7°C | 5.7°C | 31.2°C | -0.8°C | 30 mm | 55% | 3.5 m/s | 3.9 |
| 1987 | 22.3°C | 15.2°C | 8.1°C | 33.5°C | 4.1°C | 39 mm | 57% | 2.9 m/s | 4.1 |
| 1986 | 16.1°C | 10.5°C | 5.0°C | 23.0°C | -0.7°C | 84 mm | 66% | 3.2 m/s | 3.1 |
| 1985 ❄️ | 15.2°C | 9.5°C | 3.8°C | 25.4°C | -4.8°C | 50 mm | 66% | 3.4 m/s | 3.3 |
| 1984 | 16.2°C | 10.0°C | 3.8°C | 29.2°C | -4.3°C | 36 mm | 58% | 3.2 m/s | 3.3 |
| 1983 | 17.8°C | 12.1°C | 6.3°C | 34.8°C | -3.4°C | 55 mm | 58% | 3.7 m/s | — |
| 1982 | 19.7°C | 13.0°C | 6.3°C | 32.9°C | -2.7°C | 49 mm | 58% | 3.3 m/s | — |
| 1981 | 22.1°C | 15.0°C | 8.0°C | 31.8°C | 0.2°C | 28 mm | 49% | 3.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20.8°C with lows near 7.5°C (mean 14.2°C), based on 45 years of NASA POWER data.
September averages 36 mm of rainfall in Weyburn, about average for rainfall. The wettest on record was 132 mm in 2019.
The hottest September reached 36.2°C in 1998. The coldest dipped to -5.2°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.5°C. Daytime highs moved from 18.2°C to 24.4°C and overnight lows from 5.6°C to 10.5°C over the same span.
September is one of the warmer months of the year in Weyburn and about average for rainfall, so plan for around 20.8°C daytime highs and 7.5°C at night.
Not quite — September is the 9th coolest month in Weyburn, averaging 14.2°C.
For September in Weyburn, pack warm layers and a jacket for chilly mornings, with typical highs of 20.8°C and lows of 7.5°C.
Relative humidity in September averages 59% — moderately humid.
Average wind speed in September is 3.2 m/s. The windiest September on record averaged 4 m/s (2020).
The wettest September on record was 2019 with 132 mm. On average, September sees 36 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 Weyburn 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.
