September is one of the cooler months of the year in Norseman, with average highs near 22.6°C and lows around 7.3°C (mean 15°C). It is about average for rainfall, averaging 24 mm of rainfall and 60% relative humidity across the period.
September is one of the cooler months of the year in Norseman. Across 45 years of records, the warmest September in Norseman was 2023 — when the month averaged 18.4°C — while the coldest was 1992 at 11.7°C. Typical September days reach 22.6°C with nights near 7.3°C. The long-term September temperature trend is broadly flat.
September is about average for rainfall in Norseman, averaging 24 mm of rainfall. The wettest September on record was 2008 with 72 mm, while the driest was 1989 at 3 mm.
Relative humidity in Norseman during September averages 60%. The most humid September was 1992 at 76%, and the least humid was 1981 at 51%.
September receives about 5.1 kWh/m²/day of solar energy in Norseman. The sunniest September was 1989 at 5.6 kWh/m²/day, and the cloudiest was 1992 at 4.3.
Average wind speed in Norseman during September is 3.4 m/s. The windiest September was 1996 at 4 m/s, while the calmest were 1987 and 2004 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.1°C | 14.6°C | 15.0°C | 14.9°C | 15.5°C | +0.4°C |
| Avg High | 22.8°C | 22.0°C | 22.9°C | 22.6°C | 23.3°C | +0.5°C |
| Avg Low | 7.3°C | 7.2°C | 7.2°C | 7.3°C | 7.7°C | +0.4°C |
| Avg Rain | 19 mm | 29 mm | 27 mm | 23 mm | 17 mm | -2 mm |
September temperatures in Norseman have risen by about 0.3°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 0°C (2019) to a record high of 37.1°C (2023).
Rainfall in September is about average for rainfall, averaging 24 mm, with a wettest year of 72 mm.
A good time to visit Norseman
September is a good time to visit Norseman, with days averaging 22.6°C and nights around 7.3°C (mean 15°C, cooler than Norseman's yearly average) and low rainfall. March and November are marginally more temperate, but September still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 22.3°C | 14.7°C | 7.2°C | 32.1°C | 3.8°C | 17 mm | 62% | 3.3 m/s | 5.3 |
| 2024 | 23.5°C | 15.5°C | 7.5°C | 31.0°C | 2.5°C | 14 mm | 59% | 3.2 m/s | 5.5 |
| 2023 🔥 | 26.7°C | 18.4°C | 10.2°C | 37.1°C | 3.2°C | 12 mm | 55% | 3.6 m/s | 5.3 |
| 2022 | 21.5°C | 14.4°C | 7.2°C | 26.8°C | 3.2°C | 28 mm | 66% | 3.4 m/s | 4.9 |
| 2021 | 22.2°C | 14.1°C | 6.1°C | 30.0°C | 0.5°C | 18 mm | 59% | 3.3 m/s | 5.3 |
| 2020 | 23.6°C | 15.8°C | 8.0°C | 30.9°C | 5.1°C | 10 mm | 59% | 3.6 m/s | 5.1 |
| 2019 | 25.2°C | 16.8°C | 8.4°C | 34.5°C | 0.0°C | 12 mm | 58% | 3.2 m/s | 5.5 |
| 2018 | 22.3°C | 14.5°C | 6.8°C | 33.3°C | 0.8°C | 34 mm | 61% | 3.1 m/s | 5.3 |
| 2017 | 21.9°C | 14.9°C | 7.9°C | 34.2°C | 2.3°C | 35 mm | 61% | 3.1 m/s | 4.6 |
| 2016 | 19.5°C | 12.3°C | 5.1°C | 30.4°C | 1.8°C | 30 mm | 64% | 3.4 m/s | 5.1 |
| 2015 | 22.8°C | 14.5°C | 6.3°C | 30.9°C | 2.0°C | 12 mm | 62% | 3.2 m/s | 5.4 |
| 2014 | 24.5°C | 16.7°C | 8.9°C | 33.8°C | 4.9°C | 36 mm | 59% | 3.5 m/s | 5.2 |
| 2013 | 22.8°C | 15.6°C | 8.4°C | 30.0°C | 3.4°C | 29 mm | 61% | 3.6 m/s | 5 |
| 2012 | 23.3°C | 15.5°C | 7.6°C | 31.0°C | 4.0°C | 19 mm | 55% | 3.6 m/s | 5.4 |
| 2011 | 22.7°C | 14.9°C | 7.1°C | 28.3°C | 4.6°C | 14 mm | 59% | 3.3 m/s | 5.2 |
| 2010 | 21.0°C | 13.6°C | 6.2°C | 30.2°C | 3.6°C | 9 mm | 62% | 3.2 m/s | 5.1 |
| 2009 | 20.5°C | 13.0°C | 5.5°C | 25.1°C | 2.0°C | 31 mm | 59% | 3.8 m/s | 5.2 |
| 2008 🌧️ | 23.0°C | 15.2°C | 7.5°C | 30.6°C | 3.1°C | 72 mm | 59% | 3.7 m/s | 4.9 |
| 2007 | 24.0°C | 15.8°C | 7.6°C | 31.5°C | 4.1°C | 12 mm | 53% | 3.8 m/s | 5.1 |
| 2006 | 23.4°C | 15.7°C | 8.1°C | 32.5°C | 3.9°C | 21 mm | 57% | 3.5 m/s | 5 |
| 2005 | 21.8°C | 14.3°C | 6.7°C | 29.0°C | 2.4°C | 36 mm | 60% | 3.8 m/s | 5.1 |
| 2004 | 23.2°C | 15.1°C | 7.0°C | 30.4°C | 1.1°C | 17 mm | 57% | 2.8 m/s | 5 |
| 2003 | 21.8°C | 14.3°C | 6.8°C | 28.4°C | 3.3°C | 57 mm | 63% | 3.7 m/s | 5 |
| 2002 | 23.6°C | 15.2°C | 6.8°C | 32.2°C | 2.8°C | 5 mm | 53% | 3.6 m/s | 5.4 |
| 2001 | 23.0°C | 15.3°C | 7.5°C | 31.8°C | 2.2°C | 14 mm | 59% | 3.5 m/s | 4.9 |
| 2000 | 24.5°C | 16.3°C | 8.2°C | 34.3°C | 3.5°C | 5 mm | 58% | 3.2 m/s | 5.4 |
| 1999 | 23.1°C | 15.5°C | 7.8°C | 32.9°C | 2.7°C | 21 mm | 59% | 3.6 m/s | 5 |
| 1998 | 21.4°C | 14.2°C | 7.0°C | 28.8°C | 2.7°C | 28 mm | 63% | 3.6 m/s | 4.6 |
| 1997 | 21.9°C | 14.7°C | 7.6°C | 28.4°C | 2.0°C | 53 mm | 67% | 3 m/s | 4.7 |
| 1996 | 21.9°C | 14.5°C | 7.1°C | 30.4°C | 3.0°C | 47 mm | 61% | 4 m/s | 5.1 |
| 1995 | 23.4°C | 15.7°C | 8.0°C | 31.4°C | 4.0°C | 14 mm | 61% | 3.2 m/s | 4.8 |
| 1994 | 22.7°C | 14.7°C | 6.8°C | 29.1°C | 3.3°C | 26 mm | 59% | 3.3 m/s | 5.4 |
| 1993 | 21.2°C | 14.0°C | 6.8°C | 26.7°C | 2.1°C | 16 mm | 62% | 3.4 m/s | 5 |
| 1992 ❄️ | 17.5°C | 11.7°C | 6.0°C | 23.6°C | 2.6°C | 58 mm | 76% | 3.4 m/s | 4.3 |
| 1991 | 23.1°C | 15.1°C | 7.2°C | 33.0°C | 2.9°C | 17 mm | 59% | 3.4 m/s | 5.4 |
| 1990 | 23.5°C | 15.5°C | 7.4°C | 31.4°C | 3.6°C | 11 mm | 55% | 3 m/s | 5.4 |
| 1989 | 22.9°C | 15.0°C | 7.1°C | 31.2°C | 2.3°C | 3 mm | 58% | 3.5 m/s | 5.6 |
| 1988 | 23.0°C | 15.2°C | 7.4°C | 28.4°C | 3.0°C | 6 mm | 58% | 3.4 m/s | 5.2 |
| 1987 | 23.5°C | 15.7°C | 7.8°C | 35.1°C | 3.4°C | 14 mm | 56% | 2.8 m/s | 5 |
| 1986 | 21.1°C | 14.0°C | 6.9°C | 26.0°C | 2.5°C | 23 mm | 67% | 2.9 m/s | 4.8 |
| 1985 | 22.5°C | 14.9°C | 7.3°C | 30.2°C | 1.1°C | 27 mm | 59% | 3.3 m/s | 5.2 |
| 1984 | 19.2°C | 12.4°C | 5.5°C | 24.2°C | 1.8°C | 44 mm | 66% | 3.1 m/s | 4.9 |
| 1983 | 24.4°C | 16.6°C | 8.8°C | 33.3°C | 5.1°C | 31 mm | 58% | 3.5 m/s | — |
| 1982 | 23.0°C | 15.1°C | 7.2°C | 29.2°C | 1.8°C | 15 mm | 54% | 3 m/s | — |
| 1981 | 25.3°C | 16.6°C | 8.0°C | 31.5°C | 2.5°C | 7 mm | 51% | 3.1 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 22.6°C with lows near 7.3°C (mean 15°C), based on 45 years of NASA POWER data.
September averages 24 mm of rainfall in Norseman, about average for rainfall. The wettest on record was 72 mm in 2008.
The hottest September reached 37.1°C in 2023. The coldest dipped to 0°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 0.3°C. Daytime highs moved from 22.9°C to 23.2°C and overnight lows from 7.4°C to 7.6°C over the same span.
September is one of the cooler months of the year in Norseman and about average for rainfall, so plan for around 22.6°C daytime highs and 7.3°C at night.
Not quite — September is the 5th coolest month in Norseman, averaging 15°C.
For September in Norseman, pack warm layers and a jacket for chilly mornings, with typical highs of 22.6°C and lows of 7.3°C.
Relative humidity in September averages 60% — moderately humid.
Average wind speed in September is 3.4 m/s. The windiest September on record averaged 4 m/s (1996).
The wettest September on record was 2008 with 72 mm. On average, September sees 24 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 Norseman 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.
