September is one of the cooler months of the year in Central Coast, with average highs near 20.4°C and lows around 11°C (mean 15.7°C). It is one of the drier months, averaging 51 mm of rainfall and 68% relative humidity across the period.
September is one of the cooler months of the year in Central Coast. Across 45 years of records, the warmest Septembers in Central Coast were 2013 and 2023 — when the month averaged 18.2°C — while the coldest was 1990 at 13.4°C. Typical September days reach 20.4°C with nights near 11°C. The long-term trend is warming, about 0.5°C per decade.
September is one of the drier months in Central Coast, averaging 51 mm of rainfall. The wettest September on record was 1995 with 152 mm, while the driest was 2017 at 1 mm.
Relative humidity in Central Coast during September averages 68%. The most humid September was 1998 at 82%, and the least humid was 2017 at 49%.
September receives about 4.8 kWh/m²/day of solar energy in Central Coast. The sunniest September was 2017 at 5.4 kWh/m²/day, and the cloudiest were 1995 and 2022 at 4.2.
Average wind speed in Central Coast during September is 1.3 m/s. The windiest Septembers were 1982, 2006 and 2015 at 1.5 m/s, while the calmest were 2012, 2013 and 2023, among others at 1.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 14.8°C | 14.8°C | 16.4°C | 16.2°C | 16.5°C | +1.7°C |
| Avg High | 19.4°C | 19.2°C | 21.3°C | 21.0°C | 21.3°C | +1.9°C |
| Avg Low | 10.3°C | 10.4°C | 11.5°C | 11.3°C | 11.6°C | +1.3°C |
| Avg Rain | 58 mm | 66 mm | 46 mm | 43 mm | 38 mm | -19 mm |
September temperatures in Central Coast have risen by about 1.4°C between 1981–1985 and 2021–2025.
September has ranged from a record low of 4.9°C (1992) to a record high of 32.7°C (2023).
Rainfall in September is one of the drier months, averaging 51 mm, with a wettest year of 152 mm.
A good time to visit Central Coast
September is a good time to visit Central Coast, with days averaging 20.4°C and nights around 11°C (mean 15.7°C, cooler than Central Coast's yearly average) and moderate rainfall. December and March 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 | 21.0°C | 16.2°C | 11.4°C | 26.2°C | 7.8°C | 42 mm | 72% | 1.3 m/s | 5.1 |
| 2024 | 22.6°C | 17.2°C | 11.9°C | 28.2°C | 8.0°C | 30 mm | 57% | 1.4 m/s | 4.7 |
| 2023 | 24.1°C | 18.2°C | 12.2°C | 32.7°C | 6.8°C | 10 mm | 58% | 1.2 m/s | 5.2 |
| 2022 | 18.0°C | 14.8°C | 11.5°C | 20.0°C | 7.3°C | 87 mm | 81% | 1.4 m/s | 4.2 |
| 2021 | 21.2°C | 16.0°C | 10.9°C | 26.8°C | 6.7°C | 32 mm | 64% | 1.4 m/s | 5 |
| 2020 | 21.0°C | 16.4°C | 11.9°C | 27.7°C | 8.3°C | 29 mm | 69% | 1.3 m/s | 4.8 |
| 2019 | 21.1°C | 16.2°C | 11.3°C | 28.5°C | 8.3°C | 58 mm | 65% | 1.4 m/s | 4.9 |
| 2018 | 20.7°C | 15.9°C | 11.1°C | 29.1°C | 8.0°C | 35 mm | 65% | 1.3 m/s | 4.7 |
| 2017 | 23.3°C | 17.5°C | 11.7°C | 32.5°C | 7.8°C | 1 mm | 49% | 1.4 m/s | 5.4 |
| 2016 | 19.9°C | 15.7°C | 11.6°C | 22.0°C | 7.3°C | 64 mm | 72% | 1.4 m/s | 4.5 |
| 2015 | 19.6°C | 15.4°C | 11.2°C | 26.2°C | 7.5°C | 30 mm | 69% | 1.5 m/s | 4.7 |
| 2014 | 19.6°C | 15.3°C | 11.0°C | 28.6°C | 7.5°C | 37 mm | 72% | 1.3 m/s | 4.8 |
| 2013 🔥 | 23.6°C | 18.2°C | 12.9°C | 29.9°C | 9.2°C | 40 mm | 61% | 1.2 m/s | 5 |
| 2012 | 21.9°C | 16.3°C | 10.8°C | 29.7°C | 6.2°C | 25 mm | 62% | 1.2 m/s | 5.2 |
| 2011 | 19.9°C | 15.4°C | 10.9°C | 27.1°C | 6.0°C | 94 mm | 70% | 1.4 m/s | 4.6 |
| 2010 | 20.4°C | 15.7°C | 10.9°C | 25.5°C | 7.4°C | 43 mm | 69% | 1.3 m/s | 4.6 |
| 2009 | 22.6°C | 17.4°C | 12.3°C | 29.2°C | 7.5°C | 21 mm | 60% | 1.3 m/s | 5 |
| 2008 | 20.2°C | 15.6°C | 11.0°C | 28.5°C | 6.3°C | 80 mm | 69% | 1.4 m/s | 4.8 |
| 2007 | 18.7°C | 14.8°C | 10.9°C | 23.7°C | 8.5°C | 33 mm | 74% | 1.4 m/s | 4.9 |
| 2006 | 21.1°C | 16.7°C | 12.2°C | 29.2°C | 9.1°C | 116 mm | 69% | 1.5 m/s | 4.8 |
| 2005 | 20.5°C | 15.8°C | 11.0°C | 28.1°C | 8.0°C | 54 mm | 68% | 1.4 m/s | 4.6 |
| 2004 | 21.1°C | 16.1°C | 11.1°C | 30.6°C | 6.5°C | 53 mm | 67% | 1.2 m/s | 4.4 |
| 2003 | 21.7°C | 16.4°C | 11.1°C | 31.7°C | 7.9°C | 7 mm | 57% | 1.4 m/s | 5 |
| 2002 | 22.6°C | 17.0°C | 11.5°C | 30.0°C | 7.8°C | 24 mm | 58% | 1.3 m/s | 4.9 |
| 2001 | 21.6°C | 16.9°C | 12.1°C | 27.6°C | 8.9°C | 27 mm | 70% | 1.4 m/s | 4.7 |
| 2000 | 22.9°C | 17.3°C | 11.7°C | 31.6°C | 7.0°C | 38 mm | 64% | 1.2 m/s | 4.9 |
| 1999 | 19.8°C | 15.7°C | 11.6°C | 24.3°C | 7.2°C | 59 mm | 75% | 1.3 m/s | 4.5 |
| 1998 | 19.6°C | 15.9°C | 12.2°C | 26.9°C | 6.5°C | 51 mm | 82% | 1.3 m/s | 4.4 |
| 1997 | 18.8°C | 15.0°C | 11.1°C | 24.3°C | 8.1°C | 89 mm | 75% | 1.3 m/s | 4.3 |
| 1996 | 19.5°C | 14.9°C | 10.4°C | 26.2°C | 6.9°C | 85 mm | 69% | 1.4 m/s | 4.8 |
| 1995 🌧️ | 18.8°C | 14.7°C | 10.6°C | 26.1°C | 6.0°C | 152 mm | 72% | 1.4 m/s | 4.2 |
| 1994 | 21.1°C | 15.3°C | 9.6°C | 26.8°C | 6.4°C | 11 mm | 55% | 1.4 m/s | 5.3 |
| 1993 | 18.6°C | 14.4°C | 10.1°C | 25.2°C | 6.1°C | 82 mm | 73% | 1.4 m/s | 4.7 |
| 1992 | 19.0°C | 14.1°C | 9.1°C | 24.6°C | 4.9°C | 29 mm | 64% | 1.4 m/s | 4.7 |
| 1991 | 20.1°C | 14.9°C | 9.8°C | 24.4°C | 5.1°C | 21 mm | 63% | 1.4 m/s | 5.1 |
| 1990 ❄️ | 16.9°C | 13.4°C | 9.9°C | 22.2°C | 6.6°C | 79 mm | 80% | 1.4 m/s | 4.3 |
| 1989 | 18.4°C | 14.0°C | 9.6°C | 24.4°C | 5.8°C | 9 mm | 73% | 1.4 m/s | 5 |
| 1988 | 18.9°C | 15.1°C | 11.4°C | 23.3°C | 7.9°C | 107 mm | 79% | 1.4 m/s | 4.6 |
| 1987 | 19.6°C | 14.6°C | 9.6°C | 26.6°C | 5.0°C | 15 mm | 73% | 1.2 m/s | 5.2 |
| 1986 | 18.4°C | 14.4°C | 10.4°C | 24.8°C | 5.4°C | 72 mm | 78% | 1.3 m/s | 4.7 |
| 1985 | 18.1°C | 14.1°C | 10.1°C | 23.3°C | 7.4°C | 73 mm | 75% | 1.4 m/s | 4.7 |
| 1984 | 18.5°C | 13.8°C | 9.2°C | 22.8°C | 6.2°C | 38 mm | 68% | 1.4 m/s | 4.8 |
| 1983 | 20.6°C | 15.6°C | 10.7°C | 28.6°C | 7.8°C | 51 mm | 69% | 1.3 m/s | — |
| 1982 | 19.3°C | 14.7°C | 10.1°C | 28.4°C | 5.2°C | 145 mm | 66% | 1.5 m/s | — |
| 1981 | 22.9°C | 17.1°C | 11.2°C | 29.5°C | 6.1°C | 9 mm | 62% | 1.2 m/s | — |
Actual recorded September data for each year, 1981–2025 — sourced from NASA POWER.
The average high in September is around 20.4°C with lows near 11°C (mean 15.7°C), based on 45 years of NASA POWER data.
September averages 51 mm of rainfall in Central Coast, one of the drier months. The wettest on record was 152 mm in 1995.
The hottest September reached 32.7°C in 2023. The coldest dipped to 4.9°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average September temperatures have risen by about 1.4°C. Daytime highs moved from 19.9°C to 21.4°C and overnight lows from 10.3°C to 11.6°C over the same span.
September is one of the cooler months of the year in Central Coast and one of the drier months, so plan for around 20.4°C daytime highs and 11°C at night.
Not quite — September is the 5th coolest month in Central Coast, averaging 15.7°C.
For September in Central Coast, pack light layers you can adjust through the day, with typical highs of 20.4°C and lows of 11°C. Bring an umbrella or light rain jacket too.
Relative humidity in September averages 68% — moderately humid.
Average wind speed in September is 1.3 m/s. The windiest September on record averaged 1.5 m/s (1982).
The wettest September on record was 1995 with 152 mm. On average, September sees 51 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 Central Coast 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.
