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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Report Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The live forecast above shows Sydney’s expected temperature range for the coming month. Typical monthly outlooks indicate average maximums of 26–28°C, minimums of 18–20°C, and a 40–50% chance of above‑median rainfall — meaning a slightly wetter than average autumn is likely for coastal NSW.
What do the numbers mean for your city?
For Sydney, the monthly weather forecast points to a gradual cooling trend as autumn progresses, with the first week often the warmest. Across the country, a Melbourne monthly weather forecast typically shows cooler average highs of 20–22°C this time of year, while Brisbane monthly weather forecast values hover near 27°C. The Perth monthly outlook is drier than the east coast. If you’re checking the 28 day weather forecast Sydney, the first two weeks are most reliable; beyond that, trend-based guidance is used.
Understanding longer‑range outlooks
Monthly forecasts combine computer model ensembles with historical climate data. A 3 month weather forecast Brisbane AccuWeather style product tries to extend that to a seasonal view, but skill drops sharply after week two. For coastal centres like the monthly weather forecast Gold Coast and monthly weather forecast Sunshine Coast, ocean temperatures are a key driver of rainfall and humidity.
How accurate are monthly weather forecasts?
Accuracy is moderate for the first two weeks, then declines. The Bureau of Meteorology rates its monthly outlook as having 60–70% skill for temperature ranges and around 50–60% for rainfall probabilities over a 30‑day window.
What’s the difference between a 28‑day and a monthly forecast?
A 28‑day weather forecast Sydney or elsewhere is a rolling daily prediction up to four weeks ahead. A monthly weather forecast is a climate‑based outlook that states probabilities (e.g. chance of warmer/cooler, wetter/drier) rather than exact day‑to‑day numbers.
Can I get a monthly forecast for regional areas?
Yes. The BOM issues monthly outlooks for all of Australia, including regions like the monthly weather forecast Sunshine Coast. Local forecast zones are available on our Australia weather hub.