September is one of the warmer months of the year in Brandon, with average highs near 19.7°C and lows around 7°C (mean 13.4°C). It is about average for rainfall, averaging 47 mm of rainfall and 64% relative humidity across the period.
September is one of the warmer months of the year in Brandon. Across 45 years of records, the warmest September in Brandon was 2024 — when the month averaged 18°C — while the coldest was 1985 at 9°C. Typical September days reach 19.7°C with nights near 7°C. The long-term trend is warming, about 0.8°C per decade.
September is about average for rainfall in Brandon, averaging 47 mm of rainfall. The wettest September on record was 2019 with 157 mm, while the driest was 2012 at 5 mm.
Relative humidity in Brandon during September averages 64%. The most humid September was 2019 at 76%, and the least humid was 2012 at 52%.
September receives about 3.8 kWh/m²/day of solar energy in Brandon. The sunniest September was 1989 at 4.4 kWh/m²/day, and the cloudiest were 1986 and 2019 at 3.2.
Average wind speed in Brandon during September is 3.1 m/s. The windiest Septembers were 1983, 1997 and 2020 at 3.5 m/s, while the calmest was 2001 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.8°C | 13.1°C | 13.6°C | 13.3°C | 15.9°C | +4.1°C |
| Avg High | 17.9°C | 19.5°C | 20.1°C | 19.6°C | 22.5°C | +4.6°C |
| Avg Low | 5.7°C | 6.7°C | 7.1°C | 7.1°C | 9.4°C | +3.7°C |
| Avg Rain | 59 mm | 39 mm | 40 mm | 62 mm | 33 mm | -26 mm |
September temperatures in Brandon have risen by about 5.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -4.9°C (1985) to a record high of 34.9°C (2023).
Rainfall in September is about average for rainfall, averaging 47 mm, with a wettest year of 157 mm.
One of the best times to visit Brandon
September is one of the best times to visit Brandon. Expect days averaging 19.7°C and nights around 7°C (mean 13.4°C) — warmer than Brandon's yearly average — with moderate rainfall (47 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 | 23.2°C | 17.1°C | 11.0°C | 30.5°C | 2.9°C | 47 mm | 67% | 2.8 m/s | 3.3 |
| 2024 🔥 | 24.8°C | 18.0°C | 11.3°C | 31.7°C | 5.3°C | 45 mm | 62% | 3.2 m/s | 4 |
| 2023 | 23.2°C | 16.9°C | 10.6°C | 34.9°C | 3.9°C | 33 mm | 64% | 2.7 m/s | 3.6 |
| 2022 | 21.6°C | 15.3°C | 9.1°C | 32.2°C | 2.4°C | 36 mm | 63% | 3.2 m/s | 4.1 |
| 2021 | 23.2°C | 16.2°C | 9.1°C | 30.4°C | 3.3°C | 14 mm | 58% | 3.2 m/s | 4.1 |
| 2020 | 18.8°C | 12.2°C | 5.5°C | 26.3°C | -1.8°C | 20 mm | 62% | 3.5 m/s | 3.8 |
| 2019 🌧️ | 18.3°C | 13.1°C | 7.9°C | 28.7°C | -0.8°C | 157 mm | 76% | 2.9 m/s | 3.2 |
| 2018 | 16.1°C | 10.3°C | 4.4°C | 29.0°C | -4.3°C | 64 mm | 67% | 3.2 m/s | 3.4 |
| 2017 | 19.8°C | 13.7°C | 7.5°C | 31.2°C | 2.7°C | 82 mm | 66% | 3.2 m/s | 3.6 |
| 2016 | 20.2°C | 13.9°C | 7.6°C | 30.6°C | 0.6°C | 67 mm | 68% | 3.1 m/s | 3.6 |
| 2015 | 21.8°C | 15.1°C | 8.4°C | 33.0°C | 1.0°C | 48 mm | 65% | 3.1 m/s | 4 |
| 2014 | 19.1°C | 12.8°C | 6.5°C | 29.6°C | -1.8°C | 54 mm | 71% | 3 m/s | 3.7 |
| 2013 | 22.3°C | 15.6°C | 8.9°C | 31.2°C | 2.3°C | 44 mm | 66% | 2.8 m/s | 3.8 |
| 2012 | 20.6°C | 13.6°C | 6.5°C | 30.5°C | -1.8°C | 5 mm | 52% | 3.1 m/s | 4.1 |
| 2011 | 20.9°C | 14.1°C | 7.4°C | 29.9°C | -0.4°C | 33 mm | 64% | 2.9 m/s | 4.3 |
| 2010 | 16.6°C | 11.2°C | 5.8°C | 25.7°C | -1.4°C | 64 mm | 75% | 3.3 m/s | 3.5 |
| 2009 | 24.2°C | 17.3°C | 10.5°C | 29.9°C | 0.9°C | 43 mm | 67% | 3 m/s | 4.3 |
| 2008 | 18.8°C | 12.7°C | 6.6°C | 26.5°C | 3.2°C | 50 mm | 69% | 3 m/s | 3.8 |
| 2007 | 19.8°C | 13.2°C | 6.5°C | 33.1°C | -0.7°C | 33 mm | 62% | 3.1 m/s | 3.7 |
| 2006 | 19.5°C | 13.0°C | 6.4°C | 29.4°C | -0.9°C | 60 mm | 65% | 3 m/s | 4.1 |
| 2005 | 20.2°C | 13.8°C | 7.5°C | 28.8°C | 0.6°C | 21 mm | 67% | 3 m/s | 4.2 |
| 2004 | 20.3°C | 13.8°C | 7.3°C | 26.8°C | 2.0°C | 35 mm | 70% | 2.7 m/s | 3.6 |
| 2003 | 18.9°C | 12.9°C | 6.8°C | 32.7°C | -2.7°C | 51 mm | 63% | 3.3 m/s | 3.5 |
| 2002 | 20.1°C | 13.4°C | 6.7°C | 29.4°C | -4.3°C | 29 mm | 63% | 3.4 m/s | 3.8 |
| 2001 | 20.9°C | 13.9°C | 6.9°C | 30.3°C | -2.6°C | 23 mm | 59% | 2.5 m/s | 4 |
| 2000 | 18.0°C | 12.0°C | 6.0°C | 25.9°C | -2.4°C | 58 mm | 67% | 3.2 m/s | 3.5 |
| 1999 | 17.2°C | 11.2°C | 5.2°C | 25.6°C | -1.2°C | 49 mm | 66% | 3.1 m/s | 3.4 |
| 1998 | 21.6°C | 14.8°C | 8.1°C | 31.2°C | 1.0°C | 34 mm | 61% | 2.9 m/s | 4 |
| 1997 | 21.4°C | 15.0°C | 8.6°C | 27.0°C | 0.0°C | 23 mm | 59% | 3.5 m/s | 4.1 |
| 1996 | 18.8°C | 13.0°C | 7.2°C | 27.1°C | -3.4°C | 40 mm | 63% | 3 m/s | 3.7 |
| 1995 | 20.2°C | 13.4°C | 6.6°C | 31.7°C | -3.1°C | 25 mm | 56% | 2.8 m/s | 4.1 |
| 1994 | 22.3°C | 15.5°C | 8.7°C | 31.6°C | 1.4°C | 43 mm | 60% | 2.6 m/s | 4.3 |
| 1993 | 16.6°C | 10.2°C | 3.9°C | 25.7°C | -2.1°C | 26 mm | 68% | 3.3 m/s | 3.6 |
| 1992 | 17.4°C | 11.3°C | 5.1°C | 25.8°C | -3.3°C | 56 mm | 64% | 3.3 m/s | 3.5 |
| 1991 | 18.0°C | 11.9°C | 5.7°C | 30.4°C | -3.0°C | 64 mm | 63% | 3.1 m/s | 3.8 |
| 1990 | 21.7°C | 14.7°C | 7.6°C | 32.1°C | 0.6°C | 26 mm | 57% | 3.1 m/s | 4 |
| 1989 | 20.4°C | 13.3°C | 6.2°C | 31.8°C | -1.8°C | 31 mm | 59% | 3.2 m/s | 4.4 |
| 1988 | 18.7°C | 12.3°C | 6.0°C | 28.6°C | 0.9°C | 65 mm | 61% | 3.4 m/s | 3.6 |
| 1987 | 20.7°C | 14.3°C | 7.8°C | 28.0°C | 3.1°C | 43 mm | 63% | 2.8 m/s | 3.8 |
| 1986 | 16.2°C | 10.9°C | 5.7°C | 21.9°C | -1.0°C | 73 mm | 68% | 2.8 m/s | 3.2 |
| 1985 ❄️ | 14.5°C | 9.0°C | 3.6°C | 24.0°C | -4.9°C | 72 mm | 74% | 3.2 m/s | 3.3 |
| 1984 | 15.3°C | 9.4°C | 3.6°C | 29.2°C | -3.8°C | 70 mm | 64% | 3 m/s | 3.4 |
| 1983 | 17.7°C | 11.9°C | 6.2°C | 31.0°C | -3.5°C | 45 mm | 62% | 3.5 m/s | — |
| 1982 | 18.5°C | 12.2°C | 5.8°C | 32.4°C | -1.3°C | 57 mm | 64% | 3 m/s | — |
| 1981 | 18.9°C | 12.8°C | 6.7°C | 29.1°C | -0.1°C | 73 mm | 62% | 3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 19.7°C with lows near 7°C (mean 13.4°C), based on 45 years of NASA POWER data.
September averages 47 mm of rainfall in Brandon, about average for rainfall. The wettest on record was 157 mm in 2019.
The hottest September reached 34.9°C in 2023. The coldest dipped to -4.9°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 5.6°C. Daytime highs moved from 17°C to 23.2°C and overnight lows from 5.2°C to 10.2°C over the same span.
September is one of the warmer months of the year in Brandon and about average for rainfall, so plan for around 19.7°C daytime highs and 7°C at night.
Not quite — September is the 9th coolest month in Brandon, averaging 13.4°C.
For September in Brandon, pack warm layers and a jacket for chilly mornings, with typical highs of 19.7°C and lows of 7°C.
Relative humidity in September averages 64% — moderately humid.
Average wind speed in September is 3.1 m/s. The windiest September on record averaged 3.5 m/s (1983).
The wettest September on record was 2019 with 157 mm. On average, September sees 47 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 Brandon 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.
