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Sydney weather by month
Historical averages 2016–2025 · not a forecast
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When is the best time to visit Sydney?
For a warm holiday, the best week has been 14–20 April (Weather Index 91). Several start dates remain plausible, and the best timing varies between years. January is warmest (29°C), July is driest and December has the most sun.
- Warmest
- January 29°C
- Coolest
- June and July 18°C
- Driest
- July 20% rain-day chance
- Wettest
- March 48% rain-day chance
- Sunniest
- December 12 hours a day
A rain day has 1 mm or more, snow included, so a short shower counts. Monthly averages below give the amounts.
Monthly averages in Sydney
Sydney historical monthly estimates, 2016–2025. Temperatures and sunshine are daily averages.
| Month | High (°C) | Low (°C) | Rain-day chance (%) | Expected rain days | Precipitation (mm/month) | Sunshine (hours/day) |
|---|---|---|---|---|---|---|
| January | 28.6 | 19.3 | 37.7 | 11.7 | 78.7 | 10.8 |
| February | 27.8 | 18.8 | 38.2 | 10.7 | 88.0 | 10.7 |
| March | 26.2 | 17.7 | 48.1 | 14.9 | 130.0 | 9.5 |
| April | 23.9 | 13.5 | 29.3 | 8.8 | 57.2 | 9.6 |
| May | 20.6 | 9.8 | 23.2 | 7.2 | 55.0 | 8.9 |
| June | 17.6 | 7.4 | 23.0 | 6.9 | 52.5 | 8.5 |
| July | 18.1 | 6.7 | 20.3 | 6.3 | 64.0 | 8.9 |
| August | 19.2 | 7.6 | 22.6 | 7.0 | 48.8 | 9.2 |
| September | 22.3 | 9.7 | 23.0 | 6.9 | 42.6 | 10.6 |
| October | 24.1 | 12.9 | 31.0 | 9.6 | 59.8 | 10.7 |
| November | 25.6 | 15.1 | 29.3 | 8.8 | 59.5 | 11.2 |
| December | 27.9 | 17.5 | 29.4 | 9.1 | 57.8 | 11.6 |
Each month averages its own days. Precipitation includes snow. About the data
Sources
Open-Meteo · 1 Jan 2016 – 31 Dec 2025
- Open-Meteo Historical Weather API
- Local days, 2016–2025, every year weighted equally. Each weekly chart averages its own seven days, without smoothing.
- Shading shows the 10th–90th percentile of past days, not forecast confidence.
- A rain day has at least 1 mm, snow included. The last weekly period has eight days.
- Wind is the average daytime (10:00–18:00) maximum, not gusts. Daylight is calculated from latitude. Missing readings stay blank.
- Mugginess (dew point) comes from the original daily summaries, on UTC days.
- The live two-week forecast comes from the Open-Meteo Weather Forecast API. The Weather Index does not use it.