Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Oz Briefly Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Rainfall totals across Australia range from 0 mm in arid areas to over 200 mm in tropical regions during the wet season. In short, rain is liquid precipitation falling from clouds, measured in millimetres, and is the primary driver of water supply and vegetation growth.
How is rain measured and forecast?
Rainfall is measured using rain gauges (manual or automatic) and estimated by weather radar. The Bureau of Meteorology issues a bom rain forecast based on models, satellite imagery, and radar networks. For example, the melbourne weather radar 128 km loop shows real-time rain intensity and movement. A weather map australia 7 day highlights broad rain bands and fronts. Shorter-term forecasts are updated every hour; longer-term outlooks (e.g. 14 day weather forecast canberra) have lower confidence.
What drives rain patterns across Australia?
Rain is produced by cold fronts, troughs, tropical lows, and east coast lows. In the south, winter rain dominates; in the north, the summer monsoon brings heavy downpours. Local topography creates sharp gradients: coastal ranges force uplift, while inland areas stay dry. For instance, perth cold weather rain comes from westerly fronts in winter, while bom rain radar newcastle tracks east-coast lows that can deliver flooding. Check bom canberra weather for daily rain chances.
What is the difference between rain and drizzle?
Rain has droplets ≥0.5 mm in diameter; drizzle is finer (<0.5 mm) and drifts more slowly. Rain usually falls from thicker clouds and produces measurable accumulation, while drizzle often evaporates before reaching the ground in dry air.
How accurate are BOM rain forecasts?
Day‑1 rainfall forecasts are accurate about 80–90% of the time; by day‑7 accuracy drops to around 60%. The bom rain forecast is best used as a general guide, and you should check radar for short‑term “nowcasting” updates.
Why does weather in canberra 10 days often show low totals?
Canberra lies in a rain shadow east of the Brindabella Ranges. Cold fronts often weaken before reaching it, and the city’s altitude (580 m) reduces moisture. Even during a wet spell, totals are usually modest compared to coastal areas.