September is one of the warmer months of the year in Estevan, with average highs near 21.2°C and lows around 7.8°C (mean 14.5°C). It is about average for rainfall, averaging 39 mm of rainfall and 58% relative humidity across the period.
September is one of the warmer months of the year in Estevan. Across 45 years of records, the warmest September in Estevan was 2024 — when the month averaged 19.2°C — while the coldest was 1985 at 9.9°C. Typical September days reach 21.2°C with nights near 7.8°C. The long-term trend is warming, about 0.8°C per decade.
September is about average for rainfall in Estevan, averaging 39 mm of rainfall. The wettest September on record was 2019 with 151 mm, while the driest was 2012 at 4 mm.
Relative humidity in Estevan during September averages 58%. The most humid September was 2019 at 75%, and the least humid was 1990 at 48%.
September receives about 4 kWh/m²/day of solar energy in Estevan. 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 Estevan during September is 3.3 m/s. The windiest September was 2020 at 4.1 m/s, while the calmest were 1995 and 2004 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.7°C | 14.4°C | 14.6°C | 14.4°C | 17.3°C | +4.6°C |
| Avg High | 19.2°C | 21.2°C | 21.5°C | 20.7°C | 24.3°C | +5.1°C |
| Avg Low | 6.2°C | 7.5°C | 7.8°C | 8.1°C | 10.3°C | +4.1°C |
| Avg Rain | 43 mm | 30 mm | 28 mm | 62 mm | 25 mm | -18 mm |
September temperatures in Estevan have risen by about 5.7°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -5.1°C (1985) to a record high of 36.1°C (1998).
Rainfall in September is about average for rainfall, averaging 39 mm, with a wettest year of 151 mm.
One of the best times to visit Estevan
September is one of the best times to visit Estevan. Expect days averaging 21.2°C and nights around 7.8°C (mean 14.5°C) — warmer than Estevan's yearly average — with moderate rainfall (39 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 | 24.1°C | 17.8°C | 11.5°C | 31.8°C | 4.0°C | 57 mm | 64% | 2.9 m/s | 3.8 |
| 2024 🔥 | 26.6°C | 19.2°C | 11.7°C | 34.0°C | 5.6°C | 39 mm | 55% | 3.5 m/s | 4 |
| 2023 | 24.6°C | 17.9°C | 11.2°C | 35.6°C | 7.6°C | 21 mm | 59% | 2.9 m/s | 3.9 |
| 2022 | 24.2°C | 17.2°C | 10.2°C | 35.1°C | 3.4°C | 14 mm | 53% | 3.5 m/s | 4.1 |
| 2021 | 25.0°C | 17.5°C | 10.0°C | 33.1°C | 3.5°C | 11 mm | 48% | 3.2 m/s | 4.3 |
| 2020 | 21.3°C | 14.3°C | 7.4°C | 31.4°C | -1.5°C | 10 mm | 54% | 4.1 m/s | 4 |
| 2019 🌧️ | 19.2°C | 13.9°C | 8.7°C | 31.4°C | -0.6°C | 151 mm | 75% | 3.3 m/s | 3.2 |
| 2018 | 17.4°C | 11.6°C | 5.7°C | 32.0°C | -3.9°C | 31 mm | 63% | 3.1 m/s | 3.4 |
| 2017 | 21.0°C | 14.6°C | 8.2°C | 32.9°C | 2.2°C | 45 mm | 59% | 3.2 m/s | 3.6 |
| 2016 | 20.2°C | 14.3°C | 8.4°C | 31.1°C | -0.6°C | 92 mm | 66% | 3.2 m/s | 3.5 |
| 2015 | 22.9°C | 15.9°C | 8.9°C | 34.0°C | 3.2°C | 86 mm | 60% | 3.3 m/s | 4.1 |
| 2014 | 20.5°C | 13.8°C | 7.2°C | 32.3°C | -1.8°C | 36 mm | 64% | 3.3 m/s | 4 |
| 2013 | 23.2°C | 16.7°C | 10.3°C | 33.2°C | 2.3°C | 50 mm | 61% | 3.2 m/s | 3.8 |
| 2012 | 22.9°C | 15.6°C | 8.2°C | 33.4°C | -0.3°C | 4 mm | 48% | 3.2 m/s | 4.6 |
| 2011 | 22.0°C | 15.2°C | 8.4°C | 29.5°C | -1.7°C | 38 mm | 62% | 3.1 m/s | 4.6 |
| 2010 | 17.7°C | 12.1°C | 6.5°C | 28.5°C | -2.7°C | 86 mm | 73% | 3.3 m/s | 3.5 |
| 2009 | 25.3°C | 18.1°C | 10.9°C | 32.1°C | 3.0°C | 18 mm | 59% | 3.4 m/s | 4.6 |
| 2008 | 19.8°C | 13.2°C | 6.6°C | 27.8°C | 1.6°C | 75 mm | 66% | 3.1 m/s | 4 |
| 2007 | 21.3°C | 14.4°C | 7.5°C | 32.2°C | -1.8°C | 25 mm | 56% | 3.3 m/s | 4.1 |
| 2006 | 20.4°C | 13.9°C | 7.4°C | 31.1°C | -1.4°C | 44 mm | 61% | 3.2 m/s | 4 |
| 2005 | 22.2°C | 15.1°C | 8.0°C | 33.6°C | 1.3°C | 9 mm | 58% | 3.2 m/s | 4.3 |
| 2004 | 21.6°C | 14.8°C | 8.0°C | 34.0°C | 0.7°C | 27 mm | 60% | 2.7 m/s | 3.9 |
| 2003 | 20.2°C | 13.6°C | 7.0°C | 35.0°C | -3.2°C | 19 mm | 54% | 3.5 m/s | 3.8 |
| 2002 | 21.5°C | 14.4°C | 7.3°C | 31.1°C | -1.7°C | 28 mm | 58% | 3.5 m/s | 4.2 |
| 2001 | 22.4°C | 15.2°C | 8.1°C | 32.7°C | 0.4°C | 14 mm | 54% | 3 m/s | 4.1 |
| 2000 | 20.3°C | 13.7°C | 7.1°C | 30.2°C | -4.0°C | 25 mm | 58% | 3.5 m/s | 3.6 |
| 1999 | 17.9°C | 11.5°C | 5.1°C | 28.3°C | -3.4°C | 40 mm | 60% | 3.3 m/s | 3.8 |
| 1998 | 24.2°C | 16.8°C | 9.4°C | 36.1°C | 1.2°C | 24 mm | 52% | 3.1 m/s | 4.2 |
| 1997 | 23.6°C | 16.5°C | 9.4°C | 30.4°C | 1.2°C | 14 mm | 52% | 3.6 m/s | 4.3 |
| 1996 | 19.4°C | 13.4°C | 7.4°C | 27.1°C | -0.1°C | 47 mm | 60% | 3.5 m/s | 3.6 |
| 1995 | 20.2°C | 13.5°C | 6.8°C | 31.3°C | -4.3°C | 39 mm | 57% | 2.7 m/s | 4.4 |
| 1994 | 23.7°C | 16.5°C | 9.4°C | 33.4°C | 2.6°C | 29 mm | 53% | 3 m/s | 4.4 |
| 1993 | 18.2°C | 11.5°C | 4.9°C | 27.8°C | -0.1°C | 19 mm | 62% | 3.5 m/s | 3.9 |
| 1992 | 20.1°C | 13.2°C | 6.3°C | 31.1°C | -1.4°C | 16 mm | 53% | 3.5 m/s | 4 |
| 1991 | 20.2°C | 13.8°C | 7.4°C | 34.4°C | -3.2°C | 55 mm | 59% | 3.5 m/s | 3.9 |
| 1990 | 24.6°C | 17.0°C | 9.4°C | 34.5°C | 1.3°C | 13 mm | 48% | 3.2 m/s | 4.5 |
| 1989 | 21.4°C | 14.3°C | 7.3°C | 31.0°C | -1.0°C | 30 mm | 53% | 3.5 m/s | 4.4 |
| 1988 | 19.9°C | 12.8°C | 5.8°C | 30.8°C | -1.0°C | 43 mm | 55% | 3.5 m/s | 3.9 |
| 1987 | 22.5°C | 15.4°C | 8.4°C | 32.7°C | 4.5°C | 29 mm | 56% | 2.9 m/s | 4.1 |
| 1986 | 16.3°C | 10.9°C | 5.4°C | 22.4°C | -0.7°C | 73 mm | 66% | 3.3 m/s | 3.1 |
| 1985 ❄️ | 15.7°C | 9.9°C | 4.1°C | 25.5°C | -5.1°C | 42 mm | 66% | 3.5 m/s | 3.3 |
| 1984 | 16.4°C | 10.1°C | 3.9°C | 29.1°C | -4.4°C | 46 mm | 58% | 3.3 m/s | 3.3 |
| 1983 | 18.2°C | 12.4°C | 6.6°C | 34.6°C | -3.7°C | 52 mm | 58% | 3.7 m/s | — |
| 1982 | 20.2°C | 13.4°C | 6.6°C | 32.6°C | -2.4°C | 47 mm | 57% | 3.3 m/s | — |
| 1981 | 22.3°C | 15.2°C | 8.1°C | 31.6°C | 0.7°C | 25 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 21.2°C with lows near 7.8°C (mean 14.5°C), based on 45 years of NASA POWER data.
September averages 39 mm of rainfall in Estevan, about average for rainfall. The wettest on record was 151 mm in 2019.
The hottest September reached 36.1°C in 1998. The coldest dipped to -5.1°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.7°C. Daytime highs moved from 18.6°C to 24.9°C and overnight lows from 5.9°C to 10.9°C over the same span.
September is one of the warmer months of the year in Estevan and about average for rainfall, so plan for around 21.2°C daytime highs and 7.8°C at night.
Not quite — September is the 9th coolest month in Estevan, averaging 14.5°C.
For September in Estevan, pack warm layers and a jacket for chilly mornings, with typical highs of 21.2°C and lows of 7.8°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 4.1 m/s (2020).
The wettest September on record was 2019 with 151 mm. On average, September sees 39 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 Estevan 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.
