Williamstown Weather in September

September in Williamstown sees daytime temperatures around 18°C (64°F) and lows of 7°C (45°F) at night. As the wettest month of the year, keep in mind that rainfall is at its highest.

Rainfall in Williamstown in September

Since this month has the highest rainfall, keep an umbrella with you to handle sudden showers. You can expect rain on around 9 days based on historical patterns, with 59 mm (2.3 in) average for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Williamstown in September

In September, Williamstown sees pleasant temperatures, with highs of 18°C (64°F). Nights drop to around 7°C (45°F). Conditions are often most pleasant around the middle of the day. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Williamstown in September

Expect a lot of sunshine this month, with about 204 hours of sun. These sunny conditions add to the overall experience.

If you prefer enjoying temperate temperatures and rain-free days, January, February, March, April, October, November and December 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.

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• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Williamstown's climate page.

Williamstown Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 18°C (64°F)  

Chance of Rain 28%  

Precipitation 59 mm (2.3 in)  

Rainy days 9 days  

Humidity 51% *  

Sunshine 204 hours *  

Percentage Sunshine 61% *  

* Data from: Adelaide, Australia (39 KM, 24 Miles).

What to Wear in Williamstown in September

For Williamstown in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Williamstown in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

10/10

Walking

10/10

Camping

4/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Williamstown's climate page.

More climate data for Williamstown

Temperature Rainfall Sunshine Humidity

See the full Williamstown climate overview or explore weather in Australia.