September is close to Raisen's year-round average, with average highs near 31.6°C and lows around 19.2°C (mean 25.4°C). It is a relatively wet time of year, averaging 170 mm of rainfall and 83% relative humidity across the period.
September is close to Raisen's year-round average. Across 45 years of records, the warmest September in Raisen was 1988 — when the month averaged 27°C — while the coldest was 1994 at 22.8°C. Typical September days reach 31.6°C with nights near 19.2°C. The long-term September temperature trend is broadly flat.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.7°C | 25.0°C | 25.5°C | 25.2°C | 26.0°C | +0.3°C |
| Avg High | 32.2°C | 31.2°C | 32.1°C | 31.2°C | 31.4°C | -0.8°C |
| Avg Low | 19.1°C | 18.8°C | 19.0°C | 19.2°C | 20.6°C | +1.5°C |
| Avg Rain | 150 mm | 194 mm | 144 mm | 157 mm | 221 mm | +71 mm |
September temperatures in Raisen have risen by about 0.6°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 15.3°C (1994) to a record high of 33.5°C (2001).
Rainfall in September is a relatively wet time of year, averaging 170 mm, with a wettest year of 545 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
A good time to visit Raisen
September is a good time to visit Raisen, with days averaging 31.6°C and nights around 19.2°C (mean 25.4°C, close to Raisen's yearly average) and higher rainfall. February and October are marginally more temperate, but September still suits most travellers.
| Year | High | Low | Avg | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|
| 2025 | 30.9°C | 21.0°C | 25.9°C | 233 mm | 87% | 1.9 m/s | 4.2 |
| 2024 | 31.6°C | 20.1°C | 25.9°C | 226 mm | 89% | 2.2 m/s | 4.2 |
| 2023 | 32.0°C | 20.4°C | 26.2°C | 247 mm | 85% | 2.3 m/s | 4.3 |
| 2022 | 31.2°C | 20.4°C | 25.8°C | 229 mm | 87% | 2.1 m/s | 4.4 |
| 2021 | 30.6°C | 21.9°C | 26.3°C | 254 mm | 88% | 2.2 m/s | 4 |
| 2020 | 32.1°C | 20.0°C | 26.1°C | 138 mm | 85% | 1.7 m/s | 4.9 |
| 2019 🌧️ | 30.8°C | 20.4°C | 25.6°C | 545 mm | 92% | 2 m/s | 3.3 |
| 2018 | 31.1°C | 19.7°C | 25.4°C | 135 mm | 84% | 2.5 m/s | 4.3 |
| 2017 | 32.1°C | 18.8°C | 25.5°C | 170 mm | 81% | 1.7 m/s | 4.8 |
| 2016 | 30.7°C | 20.1°C | 25.4°C | 68 mm | 86% | 2.1 m/s | 4.9 |
| 2015 | 31.9°C | 17.2°C | 24.5°C | 47 mm | 80% | 2.1 m/s | 5.5 |
| 2014 | 31.4°C | 18.9°C | 25.2°C | 133 mm | 85% | 2.4 m/s | 5 |
| 2013 | 31.6°C | 19.9°C | 25.7°C | 46 mm | 83% | 1.8 m/s | 5.3 |
| 2012 | 31.4°C | 18.6°C | 25.0°C | 89 mm | 84% | 1.8 m/s | 4.7 |
| 2011 | 30.1°C | 18.8°C | 24.5°C | 230 mm | 88% | 2.2 m/s | 4.7 |
| 2010 | 30.7°C | 19.4°C | 25.1°C | 112 mm | 82% | 2 m/s | 4.9 |
| 2009 | 33.3°C | 18.9°C | 26.1°C | 144 mm | 81% | 2.2 m/s | 5.5 |
| 2008 | 31.8°C | 19.1°C | 25.4°C | 155 mm | 83% | 1.8 m/s | 5.3 |
| 2007 | 31.3°C | 18.8°C | 25.1°C | 238 mm | 84% | 1.6 m/s | 5 |
| 2006 | 30.9°C | 17.9°C | 24.4°C | 200 mm | 85% | 1.8 m/s | 5.3 |
| 2005 | 33.2°C | 19.0°C | 26.1°C | 244 mm | 84% | 2.4 m/s | 4.6 |
| 2004 | 32.3°C | 21.0°C | 26.6°C | 33 mm | 80% | 1.5 m/s | 5.5 |
| 2003 | 29.7°C | 20.4°C | 25.0°C | 284 mm | 90% | 2.4 m/s | 3.4 |
| 2002 | 32.3°C | 17.8°C | 25.1°C | 83 mm | 80% | 2.3 m/s | 5.6 |
| 2001 | 33.5°C | 18.5°C | 26.0°C | 15 mm | 72% | 1.6 m/s | 5.7 |
| 2000 | 32.9°C | 18.2°C | 25.5°C | 48 mm | 78% | 2.1 m/s | 5.2 |
| 1999 | 31.3°C | 20.0°C | 25.7°C | 195 mm | 85% | 2.3 m/s | 3.7 |
| 1998 | 31.8°C | 21.7°C | 26.7°C | 186 mm | 84% | 2.1 m/s | 4.9 |
| 1997 | 32.0°C | 18.5°C | 25.2°C | 125 mm | 83% | 1.9 m/s | 5.3 |
| 1996 | 31.8°C | 19.1°C | 25.4°C | 194 mm | 84% | 1.7 m/s | 5.4 |
| 1995 | 31.8°C | 18.0°C | 24.9°C | 200 mm | 82% | 2.1 m/s | 5.4 |
| 1994 ❄️ | 30.3°C | 15.3°C | 22.8°C | 137 mm | 82% | 2.3 m/s | 5.3 |
| 1993 | 30.4°C | 20.1°C | 25.2°C | 400 mm | 87% | 2.6 m/s | 4 |
| 1992 | 30.9°C | 16.6°C | 23.7°C | 95 mm | 82% | 2.1 m/s | 5.3 |
| 1991 | 31.7°C | 17.8°C | 24.8°C | 20 mm | 80% | 2.1 m/s | 5.8 |
| 1990 | 30.0°C | 21.3°C | 25.6°C | 389 mm | 90% | 2.5 m/s | 3.4 |
| 1989 | 32.2°C | 17.7°C | 25.0°C | 156 mm | 78% | 2.1 m/s | 5.6 |
| 1988 🔥 | 32.8°C | 21.3°C | 27.0°C | 90 mm | 83% | 2 m/s | 5.6 |
| 1987 | 33.2°C | 19.2°C | 26.2°C | 91 mm | 78% | 2.6 m/s | 5.4 |
| 1986 | 32.9°C | 18.9°C | 25.9°C | 132 mm | 78% | 2 m/s | 5.6 |
| 1985 | 32.2°C | 19.2°C | 25.7°C | 233 mm | 81% | 2.4 m/s | 5.2 |
| 1984 | 31.2°C | 18.0°C | 24.6°C | 57 mm | 82% | 2.3 m/s | 5.3 |
| 1983 | 31.0°C | 20.4°C | 25.7°C | 380 mm | 87% | 1.7 m/s | — |
| 1982 | 32.0°C | 16.8°C | 24.4°C | 106 mm | 82% | 2.3 m/s | — |
| 1981 | 32.2°C | 20.8°C | 26.5°C | 109 mm | 83% | 2.3 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 31.6°C with lows near 19.2°C (mean 25.4°C), based on 45 years of NASA POWER data.
September averages 170 mm of rainfall in Raisen, a relatively wet time of year. The wettest on record was 545 mm in 2019.
The hottest September reached 33.5°C in 2001. The coldest dipped to 15.3°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.6°C. Daytime highs moved from 31.7°C to 31.3°C and overnight lows from 19°C to 20.8°C over the same span.
September is close to Raisen's year-round average and a relatively wet time of year, so plan for around 31.6°C daytime highs and 19.2°C at night.
Not quite — September is the 6th coolest month in Raisen, averaging 25.4°C.
For September in Raisen, pack light, breathable clothing and sun protection, with typical highs of 31.6°C and lows of 19.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 83% — quite humid.
Average wind speed in September is 2.1 m/s. The windiest September on record averaged 2.6 m/s (1987).
The wettest September on record was 2019 with 545 mm. On average, September sees 170 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 Raisen 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.
