September is one of the warmer months of the year in Brant, with average highs near 22.9°C and lows around 12.4°C (mean 17.7°C). It is a relatively wet time of year, averaging 74 mm of rainfall and 70% relative humidity across the period.
September is one of the warmer months of the year in Brant. Across 45 years of records, the warmest September in Brant was 2024 — when the month averaged 20.4°C — while the coldest was 1993 at 14.5°C. Typical September days reach 22.9°C with nights near 12.4°C. The long-term trend is warming, about 0.8°C per decade.
September is a relatively wet time of year in Brant, averaging 74 mm of rainfall. The wettest September on record was 1986 with 177 mm, while the driest was 2023 at 21 mm.
Relative humidity in Brant during September averages 70%. The most humid September was 1992 at 79%, and the least humid was 2025 at 61%.
September receives about 4.1 kWh/m²/day of solar energy in Brant. The sunniest Septembers were 2004 and 2005 at 4.7 kWh/m²/day, and the cloudiest were 1993 and 2006 at 3.2.
Average wind speed in Brant during September is 3.2 m/s. The windiest September was 2010 at 3.9 m/s, while the calmest was 2025 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.6°C | 16.5°C | 18.0°C | 18.4°C | 19.2°C | +2.6°C |
| Avg High | 21.7°C | 21.8°C | 23.4°C | 23.4°C | 24.7°C | +3°C |
| Avg Low | 11.4°C | 11.2°C | 12.6°C | 13.3°C | 13.7°C | +2.3°C |
| Avg Rain | 91 mm | 76 mm | 75 mm | 79 mm | 38 mm | -53 mm |
September temperatures in Brant have risen by about 2.9°C between 1981–1985 and 2021–2025.
September has ranged from a record low of -0.3°C (1993) to a record high of 33°C (2002).
Rainfall in September is a relatively wet time of year, averaging 74 mm, with a wettest year of 177 mm.
One of the best times to visit Brant
September is one of the best times to visit Brant. Expect days averaging 22.9°C and nights around 12.4°C (mean 17.7°C) — warmer than Brant's yearly average — with moderate rainfall (74 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 | 25.8°C | 19.8°C | 13.8°C | 30.2°C | 8.3°C | 29 mm | 61% | 2.5 m/s | 4.6 |
| 2024 🔥 | 26.0°C | 20.4°C | 14.9°C | 29.3°C | 9.7°C | 30 mm | 65% | 2.9 m/s | 4.4 |
| 2023 | 24.8°C | 19.4°C | 13.9°C | 32.7°C | 9.2°C | 21 mm | 67% | 2.9 m/s | 4.2 |
| 2022 | 23.9°C | 18.6°C | 13.4°C | 31.1°C | 5.2°C | 34 mm | 66% | 3.1 m/s | 4 |
| 2021 | 24.2°C | 18.9°C | 13.7°C | 28.9°C | 7.4°C | 79 mm | 67% | 3.7 m/s | 4.3 |
| 2020 | 23.4°C | 18.0°C | 12.5°C | 29.2°C | 4.2°C | 33 mm | 68% | 3.7 m/s | 4.2 |
| 2019 | 23.7°C | 18.7°C | 13.7°C | 28.4°C | 9.6°C | 109 mm | 76% | 3.3 m/s | 3.8 |
| 2018 | 24.2°C | 19.5°C | 14.8°C | 32.1°C | 7.7°C | 91 mm | 76% | 3.3 m/s | 3.9 |
| 2017 | 24.3°C | 18.9°C | 13.6°C | 31.8°C | 6.0°C | 83 mm | 71% | 2.6 m/s | 4.6 |
| 2016 | 25.4°C | 20.2°C | 15.0°C | 32.0°C | 8.8°C | 60 mm | 67% | 3.3 m/s | 4.5 |
| 2015 | 25.1°C | 20.0°C | 14.8°C | 31.5°C | 8.7°C | 72 mm | 72% | 3 m/s | 4.3 |
| 2014 | 22.3°C | 17.3°C | 12.2°C | 29.6°C | 6.7°C | 91 mm | 74% | 3 m/s | 4.2 |
| 2013 | 21.9°C | 16.6°C | 11.3°C | 31.5°C | 4.4°C | 80 mm | 73% | 3 m/s | 4.2 |
| 2012 | 22.0°C | 17.0°C | 11.9°C | 30.5°C | 5.9°C | 78 mm | 69% | 3.1 m/s | 4.2 |
| 2011 | 22.9°C | 18.1°C | 13.4°C | 32.4°C | 6.9°C | 64 mm | 73% | 3.4 m/s | 3.7 |
| 2010 | 22.6°C | 17.4°C | 12.1°C | 31.8°C | 7.3°C | 67 mm | 68% | 3.9 m/s | 3.6 |
| 2009 | 23.4°C | 18.2°C | 13.0°C | 27.6°C | 5.3°C | 32 mm | 68% | 3.2 m/s | 4.4 |
| 2008 | 23.8°C | 18.3°C | 12.8°C | 32.1°C | 7.6°C | 64 mm | 71% | 3 m/s | 4.1 |
| 2007 | 25.2°C | 19.3°C | 13.5°C | 32.9°C | 6.5°C | 30 mm | 64% | 3.1 m/s | 4.5 |
| 2006 | 21.0°C | 16.3°C | 11.6°C | 27.0°C | 4.8°C | 76 mm | 74% | 3.7 m/s | 3.2 |
| 2005 | 25.4°C | 19.6°C | 13.8°C | 31.0°C | 7.4°C | 62 mm | 68% | 3.4 m/s | 4.7 |
| 2004 | 24.5°C | 18.9°C | 13.4°C | 28.7°C | 7.7°C | 55 mm | 70% | 3 m/s | 4.7 |
| 2003 | 21.8°C | 16.8°C | 11.8°C | 28.4°C | 4.4°C | 116 mm | 71% | 3.6 m/s | 4.2 |
| 2002 | 25.5°C | 19.8°C | 14.2°C | 33.0°C | 7.7°C | 105 mm | 66% | 3 m/s | 4.6 |
| 2001 | 21.8°C | 16.4°C | 11.1°C | 29.4°C | 4.0°C | 96 mm | 69% | 3.3 m/s | 4.2 |
| 2000 | 21.2°C | 16.1°C | 11.1°C | 30.7°C | 1.7°C | 115 mm | 75% | 3.5 m/s | 3.9 |
| 1999 | 23.7°C | 18.0°C | 12.3°C | 31.5°C | 3.0°C | 86 mm | 65% | 3.2 m/s | 4.4 |
| 1998 | 24.9°C | 19.2°C | 13.5°C | 31.3°C | 7.1°C | 35 mm | 65% | 3.2 m/s | 4.4 |
| 1997 | 22.0°C | 16.8°C | 11.6°C | 27.2°C | 3.9°C | 60 mm | 71% | 3.6 m/s | 4 |
| 1996 | 21.5°C | 16.8°C | 12.1°C | 29.6°C | 4.4°C | 142 mm | 74% | 3.4 m/s | 3.4 |
| 1995 | 21.3°C | 15.5°C | 9.7°C | 29.3°C | 4.1°C | 38 mm | 65% | 3.3 m/s | 4.3 |
| 1994 | 22.3°C | 16.7°C | 11.1°C | 28.3°C | 5.5°C | 39 mm | 70% | 3.4 m/s | 4 |
| 1993 ❄️ | 19.2°C | 14.5°C | 9.7°C | 28.5°C | -0.3°C | 100 mm | 72% | 3.6 m/s | 3.2 |
| 1992 | 20.2°C | 15.2°C | 10.2°C | 26.0°C | 3.1°C | 123 mm | 79% | 3.5 m/s | 3.8 |
| 1991 | 21.7°C | 16.2°C | 10.6°C | 30.4°C | 2.5°C | 36 mm | 63% | 3.3 m/s | 4.2 |
| 1990 | 21.3°C | 16.1°C | 10.9°C | 28.9°C | 3.4°C | 102 mm | 75% | 3.3 m/s | 3.8 |
| 1989 | 22.1°C | 16.7°C | 11.3°C | 28.9°C | 0.6°C | 71 mm | 70% | 3.2 m/s | 3.9 |
| 1988 | 22.0°C | 16.6°C | 11.1°C | 27.4°C | 6.9°C | 71 mm | 71% | 3.5 m/s | 4.1 |
| 1987 | 21.9°C | 17.0°C | 12.0°C | 27.7°C | 6.9°C | 61 mm | 75% | 2.8 m/s | 3.8 |
| 1986 🌧️ | 21.7°C | 16.4°C | 11.1°C | 26.7°C | 3.6°C | 177 mm | 76% | 3.4 m/s | 3.8 |
| 1985 | 22.9°C | 17.7°C | 12.5°C | 30.5°C | 4.8°C | 44 mm | 71% | 3.2 m/s | 4.2 |
| 1984 | 20.4°C | 15.5°C | 10.5°C | 27.6°C | 4.9°C | 94 mm | 72% | 3.1 m/s | 3.8 |
| 1983 | 23.4°C | 17.8°C | 12.3°C | 32.8°C | 4.4°C | 66 mm | 66% | 3.5 m/s | — |
| 1982 | 21.0°C | 16.0°C | 10.9°C | 29.3°C | 5.6°C | 104 mm | 75% | 2.8 m/s | — |
| 1981 | 19.7°C | 15.5°C | 11.2°C | 26.9°C | 3.1°C | 127 mm | 78% | 3.4 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 22.9°C with lows near 12.4°C (mean 17.7°C), based on 45 years of NASA POWER data.
September averages 74 mm of rainfall in Brant, a relatively wet time of year. The wettest on record was 177 mm in 1986.
The hottest September reached 33°C in 2002. The coldest dipped to -0.3°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 2.9°C. Daytime highs moved from 21.5°C to 24.9°C and overnight lows from 11.5°C to 13.9°C over the same span.
September is one of the warmer months of the year in Brant and a relatively wet time of year, so plan for around 22.9°C daytime highs and 12.4°C at night.
Not quite — September is the 9th coolest month in Brant, averaging 17.7°C.
For September in Brant, pack light layers you can adjust through the day, with typical highs of 22.9°C and lows of 12.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 70% — moderately humid.
Average wind speed in September is 3.2 m/s. The windiest September on record averaged 3.9 m/s (2010).
The wettest September on record was 1986 with 177 mm. On average, September sees 74 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 Brant 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.
