Weather in Australia in September
Country-wide climate normals across 15 cities in Australia.
How Hot Is Australia in September?
Warm sunshine dominates Australia in September: 20°C highs across most regions, modest spread.
Sunshine in Australia in September
Australia's September brings mixed skies — Sydney averages 4.3h of sun, with similar conditions nationwide. Cloudy periods alternate with sunny stretches, and the sun is up between 5:50 am and 5:45 pm. Plan for variability rather than guaranteed sunshine.
Does It Rain In Australia In September?
Moderate rainfall defines Australia's September: Sydney averages 52mm across 8 days. Some regions see meaningfully wetter weather, especially coastal or mountain-facing areas, while continental interiors tend toward the drier end of the spectrum.
Is Australia Humid In September?
Australia's September is humid — 69% on average in Sydney, with similar muggy conditions in most regions. Afternoons feel sticky, especially after rain, and the moisture amplifies warm-day temperatures noticeably. Coastal cities see the highest readings.
Wind In Australia In September
Persistent breeze shapes Australia's September: 21 kph in Sydney, with consistent wind across the country. The conditions are ideal for sailing and other wind sports, but can be disruptive for fine outdoor work.
Cloud Cover In Australia In September
Australia sees mostly cloudy weather through September: Sydney averages 54% cloud cover, and the pattern repeats across the country. Bright sun is uncommon; expect a grey, soft-lit feel to most days.