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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Southern Focus Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Mount Annan’s weather today is shaped by its inland south-west Sydney setting – expect the conditions shown in the live forecast above, with typical late-summer humidity easing as autumn approaches.
What drives Mount Annan’s local climate?
The suburb sits on the Cumberland Plain, about 60 kilometres inland, which gives it warmer daytime highs and cooler overnight lows than coastal Sydney. Summer maximums often reach the low 30s (°C), while winter mornings can drop below 5°C. The surrounding mount annan botanical gardens and remnant woodland also trap moisture, making early fog common in cooler months.
Planning a visit around the forecast
For a weather in mount annan 10 days outlook, the live forecast above gives the best guidance because patterns can shift quickly with sea-breeze changes. Hourly breakdowns – mt annan weather hourly – are especially useful for morning walks in the gardens or afternoon events. Rain is most likely from late spring to early autumn, but heavy falls are rare due to the rain-shadow effect of the Blue Mountains to the west.
Is Mount Annan weather similar to Sydney weather?
Not exactly. Mount Annan is typically 2–4°C warmer in the afternoon than coastal Sydney, and noticeably cooler overnight. The sydney weather pages on our site show the city’s more moderated maritime climate.
What is the best time to visit Mount Annan Botanical Gardens?
Spring (September–November) offers mild temperatures and peak flowering. Autumn (March–May) also delivers stable conditions. Summer can be hot, so check the mt annan weather hourly forecast for early morning or late afternoon visits.
How reliable are 10-day forecasts for Mount Annan?
Beyond 7 days, accuracy drops, especially for rainfall timing. The Bureau of Meteorology’s 7-day outlook is the most reliable; for a weather in mount annan 10 days overview, we recommend reviewing trends rather than exact temperatures.
For broader forecasts, visit our Australia weather hub or check Sydney Weather for coastal comparisons.