September is one of the warmer months of the year in Martensville, with average highs near 18.7°C and lows around 6°C (mean 12.4°C). It is about average for rainfall, averaging 40 mm of rainfall and 64% relative humidity across the period.
September is one of the warmer months of the year in Martensville. Across 45 years of records, the warmest September in Martensville was 2009 — when the month averaged 16.9°C — while the coldest was 2018 at 7.4°C. Typical September days reach 18.7°C with nights near 6°C. The long-term trend is warming, about 0.7°C per decade.
September is about average for rainfall in Martensville, averaging 40 mm of rainfall. The wettest September on record was 2005 with 123 mm, while the driest was 1995 at 5 mm.
Relative humidity in Martensville during September averages 64%. The most humid September was 2010 at 78%, and the least humid was 1990 at 55%.
September receives about 3.6 kWh/m²/day of solar energy in Martensville. 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 Martensville during September is 3 m/s. The windiest Septembers were 1983, 1996 and 1997 at 3.4 m/s, while the calmest were 2011 and 2023 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.0°C | 12.3°C | 12.3°C | 12.2°C | 14.9°C | +3.9°C |
| Avg High | 17.1°C | 18.9°C | 18.6°C | 18.4°C | 21.3°C | +4.2°C |
| Avg Low | 4.8°C | 5.8°C | 6.0°C | 6.0°C | 8.4°C | +3.6°C |
| Avg Rain | 44 mm | 29 mm | 52 mm | 43 mm | 31 mm | -12 mm |
September temperatures in Martensville have risen by about 5.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -6.2°C (2018) to a record high of 33.8°C (2022).
Rainfall in September is about average for rainfall, averaging 40 mm, with a wettest year of 123 mm.
One of the best times to visit Martensville
September is one of the best times to visit Martensville. Expect days averaging 18.7°C and nights around 6°C (mean 12.4°C) — warmer than Martensville's yearly average — with moderate rainfall (40 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 | 22.8°C | 16.2°C | 9.6°C | 29.2°C | 3.7°C | 23 mm | 62% | 2.7 m/s | 3.8 |
| 2024 | 22.8°C | 16.5°C | 10.1°C | 33.2°C | 4.2°C | 39 mm | 63% | 3 m/s | 3.5 |
| 2023 | 21.7°C | 15.6°C | 9.4°C | 28.1°C | 3.9°C | 27 mm | 62% | 2.5 m/s | 3.8 |
| 2022 | 22.3°C | 15.5°C | 8.7°C | 33.8°C | 2.2°C | 28 mm | 59% | 3 m/s | 3.9 |
| 2021 | 20.7°C | 14.0°C | 7.4°C | 29.1°C | -0.1°C | 31 mm | 63% | 3.2 m/s | 3.9 |
| 2020 | 17.4°C | 11.4°C | 5.4°C | 25.6°C | -1.7°C | 41 mm | 70% | 3.3 m/s | 3.4 |
| 2019 | 17.2°C | 12.1°C | 7.0°C | 27.3°C | -3.9°C | 84 mm | 74% | 2.8 m/s | 3.2 |
| 2018 ❄️ | 12.6°C | 7.4°C | 2.1°C | 23.6°C | -6.2°C | 57 mm | 70% | 3.1 m/s | 2.8 |
| 2017 | 19.5°C | 12.9°C | 6.3°C | 30.2°C | 1.1°C | 35 mm | 61% | 2.7 m/s | 3.7 |
| 2016 | 18.9°C | 12.6°C | 6.3°C | 29.9°C | -0.2°C | 28 mm | 65% | 2.9 m/s | 3.6 |
| 2015 | 18.8°C | 12.4°C | 6.1°C | 28.3°C | -2.4°C | 43 mm | 66% | 2.8 m/s | 3.5 |
| 2014 | 18.4°C | 11.9°C | 5.5°C | 27.7°C | -2.3°C | 16 mm | 67% | 2.8 m/s | 3.7 |
| 2013 | 21.8°C | 15.2°C | 8.5°C | 31.8°C | 1.4°C | 21 mm | 61% | 2.8 m/s | 4.1 |
| 2012 | 20.0°C | 13.1°C | 6.2°C | 27.2°C | 1.4°C | 17 mm | 62% | 3.1 m/s | 4 |
| 2011 | 21.6°C | 14.5°C | 7.4°C | 30.0°C | -0.6°C | 31 mm | 62% | 2.5 m/s | 4.3 |
| 2010 | 15.2°C | 9.7°C | 4.3°C | 23.1°C | -3.2°C | 94 mm | 78% | 3 m/s | 3.2 |
| 2009 🔥 | 23.8°C | 16.9°C | 10.0°C | 32.7°C | 2.7°C | 39 mm | 60% | 3.2 m/s | 4 |
| 2008 | 19.1°C | 12.3°C | 5.6°C | 26.8°C | 0.7°C | 12 mm | 63% | 2.8 m/s | 3.8 |
| 2007 | 17.2°C | 11.1°C | 4.9°C | 25.8°C | -1.5°C | 27 mm | 69% | 2.9 m/s | 3.5 |
| 2006 | 17.2°C | 11.5°C | 5.7°C | 28.9°C | -0.8°C | 113 mm | 74% | 2.9 m/s | 3.4 |
| 2005 🌧️ | 16.9°C | 11.2°C | 5.5°C | 25.9°C | -1.6°C | 123 mm | 76% | 2.9 m/s | 3.6 |
| 2004 | 17.1°C | 11.2°C | 5.3°C | 23.8°C | -3.7°C | 52 mm | 73% | 2.7 m/s | 3.4 |
| 2003 | 17.2°C | 11.2°C | 5.1°C | 30.3°C | -2.6°C | 44 mm | 66% | 3.2 m/s | 3.4 |
| 2002 | 17.7°C | 11.5°C | 5.3°C | 28.1°C | -5.7°C | 68 mm | 63% | 3.2 m/s | 3.5 |
| 2001 | 21.5°C | 14.3°C | 7.1°C | 29.8°C | 2.7°C | 11 mm | 56% | 3 m/s | 4.2 |
| 2000 | 18.0°C | 11.7°C | 5.3°C | 27.8°C | -4.3°C | 31 mm | 65% | 3.2 m/s | 3.5 |
| 1999 | 17.4°C | 10.9°C | 4.5°C | 26.6°C | -4.2°C | 18 mm | 59% | 3 m/s | 3.9 |
| 1998 | 20.1°C | 13.5°C | 7.0°C | 29.0°C | -1.6°C | 35 mm | 57% | 2.7 m/s | 3.9 |
| 1997 | 21.2°C | 14.2°C | 7.3°C | 29.8°C | -2.4°C | 32 mm | 61% | 3.4 m/s | 3.8 |
| 1996 | 16.0°C | 10.8°C | 5.7°C | 24.0°C | -4.1°C | 59 mm | 66% | 3.4 m/s | 3 |
| 1995 | 19.4°C | 12.7°C | 6.0°C | 29.5°C | -4.6°C | 5 mm | 57% | 2.7 m/s | 4.3 |
| 1994 | 21.3°C | 14.6°C | 7.9°C | 29.0°C | 1.2°C | 15 mm | 57% | 2.8 m/s | 3.8 |
| 1993 | 16.7°C | 10.3°C | 3.8°C | 23.9°C | -4.2°C | 52 mm | 67% | 3.2 m/s | 3.7 |
| 1992 | 16.0°C | 9.6°C | 3.3°C | 26.7°C | -2.9°C | 47 mm | 63% | 3.3 m/s | 3.2 |
| 1991 | 18.8°C | 12.1°C | 5.4°C | 30.0°C | -4.0°C | 17 mm | 58% | 3.3 m/s | 3.8 |
| 1990 | 21.6°C | 14.5°C | 7.5°C | 29.7°C | 2.0°C | 7 mm | 55% | 3 m/s | 4.1 |
| 1989 | 18.0°C | 11.7°C | 5.4°C | 25.0°C | -2.0°C | 39 mm | 64% | 3.1 m/s | 3.9 |
| 1988 | 17.9°C | 11.6°C | 5.3°C | 33.4°C | -1.8°C | 35 mm | 60% | 3.2 m/s | 3.4 |
| 1987 | 20.9°C | 14.1°C | 7.3°C | 28.4°C | 2.6°C | 15 mm | 61% | 2.7 m/s | 3.9 |
| 1986 | 15.3°C | 9.7°C | 4.1°C | 21.6°C | -0.7°C | 57 mm | 68% | 2.8 m/s | 3 |
| 1985 | 14.4°C | 8.4°C | 2.5°C | 22.8°C | -5.0°C | 31 mm | 64% | 3.1 m/s | 3.4 |
| 1984 | 14.4°C | 8.5°C | 2.5°C | 30.0°C | -4.6°C | 80 mm | 65% | 2.8 m/s | 3.3 |
| 1983 | 15.3°C | 9.9°C | 4.5°C | 30.6°C | -3.9°C | 78 mm | 66% | 3.4 m/s | — |
| 1982 | 17.4°C | 11.3°C | 5.2°C | 28.1°C | -4.6°C | 35 mm | 63% | 3 m/s | — |
| 1981 | 20.4°C | 13.5°C | 6.7°C | 31.1°C | 1.0°C | 23 mm | 56% | 2.9 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 18.7°C with lows near 6°C (mean 12.4°C), based on 45 years of NASA POWER data.
September averages 40 mm of rainfall in Martensville, about average for rainfall. The wettest on record was 123 mm in 2005.
The hottest September reached 33.8°C in 2022. The coldest dipped to -6.2°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.3°C. Daytime highs moved from 16.4°C to 22.1°C and overnight lows from 4.3°C to 9°C over the same span.
September is one of the warmer months of the year in Martensville and about average for rainfall, so plan for around 18.7°C daytime highs and 6°C at night.
Not quite — September is the 9th coolest month in Martensville, averaging 12.4°C.
For September in Martensville, pack warm layers and a jacket for chilly mornings, with typical highs of 18.7°C and lows of 6°C.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 3 m/s. The windiest September on record averaged 3.4 m/s (1983).
The wettest September on record was 2005 with 123 mm. On average, September sees 40 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 Martensville 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.
