Castlereagh Weather in September

September in Castlereagh sees daytime temperatures around 17°C (63°F) and lows of 11°C (52°F) at night. With around 85 mm (3.3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Castlereagh in September

Looking at the last 30 years, the data shows about 17 days with rain, averaging 85 mm (3.3 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Castlereagh in September

September in Castlereagh sees highs of 17°C (63°F) and lows of 11°C (52°F) overnight. September is a notable month of the summer season. Conditions are often most pleasant around the middle of the day. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Castlereagh in September

The city usually sees around 109 hours of sunlight, indicating a moderately sunny period.

Wind Speed in Castlereagh in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.