Heidelberg Weather in September

September in Heidelberg sees daytime temperatures around 17°C (63°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 Heidelberg in September

An umbrella might come in handy since it is the wettest month of the year. Historically, the month has about 10 days of rain, averaging 75 mm (3 in) in total. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Heidelberg in September

If you're visiting Heidelberg in September, expect highs of 17°C (63°F) and overnight lows around 7°C (45°F). Conditions are often most pleasant around the middle of the day. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Heidelberg in September

The month experiences a moderate amount of sunlight, with 185 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Heidelberg in September

September has wind speeds averaging 3 m/s (6 knots). You can expect comfortable light winds that steadily move flags and feel mild throughout the day. Since this is an average, daily conditions vary from gentle winds to more active breezes.

Average water temperature in September

With water at 13°C (55°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

September in Heidelberg has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.

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• January
• February
• March
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• May
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For a detailed overview over the year and the best time to visit Australia, check out our Heidelberg's climate page.

Heidelberg Temperature in September

Min Temperature 7°C (45°F)  

Max Temperature 17°C (63°F)  

Water Temperature 13°C (55°F) *  

Chance of Rain 35%  

Precipitation 75 mm (3 in)  

Rainy days 10 days  

Humidity 52% *  

Windspeed 3 m/s (6 knots) *  

Sunshine 185 hours *  

Percentage Sunshine 52% *  

* Data from: Melbourne, Australia (11 KM, 7 Miles).

What to Wear in Heidelberg in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. The water temperature sits at about 13°C (55°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Heidelberg in September

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

Swimming

6/10

Cycling

6/10

Walking

6/10

Barbeque

6/10

Camping

4/10

Outdoor sports

9/10

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 Heidelberg's climate page.

More climate data for Heidelberg

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

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