An alternative way to discover Sydney
We have made an overview of the sights in Sydney that you must see if you want to visit Sydney in an alternative way.
Mount Martha in Victoria, Australia sees moderate seasonal temperature shifts, with daytime highs between 14°C (57°F) in July and 23°C (73°F) in February, averaging 19°C (66°F) annually. Explore the full monthly breakdown below.
Seasonal changes in Mount Martha bring a little variety without extreme temperature swings. Nighttime lows range from 16°C (61°F) in February to 9°C (48°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Mount Martha by month:
The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. February, the warmest month, gets 227 hours of sunshine.
The chart below shows the average temperature throughout the year:
The map below shows the annual temperature across Australia. You can also select individual months if you want to compare a specific time of year.
Mount Martha's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:
Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Mount Martha, July is the coolest month, with average highs of 14°C (57°F) and humidity around 63%, considered high. In February, the warmest month, temperatures average 23°C (73°F) with 45% humidity, conditions that feel moderate. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Mount Martha's weather, including monthly rainfall, sunshine hours, and humidity, visit our Mount Martha climate page.
Pick a month to see the average temperature, rainfall and sunshine in Mount Martha - and find the best time to visit.
Temperature Rainfall Sunshine Humidity
See the full Mount Martha climate overview or explore weather in Australia.
Where to go in October - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
An alternative way to discover Sydney
We have made an overview of the sights in Sydney that you must see if you want to visit Sydney in an alternative way.
The most relaxed and alternative area of Australia is called the Byron Shire
The Byron Shire is one of the most pretty areas in the world. Not only in terms on natural beauty, also the relaxed vibe and people make this an area that remains close to your heart.
Sail the Whitsunday islands
The best travel period to sail the Whitsunday islands is “winter” between June and October, with pleasant temperatures around 23 degrees Celsius (74 Fahrenheit).
The best dive spots in Australia
Explore Australia's best dive spots: from the Great Barrier Reef to HMAS Perth. Discover vibrant corals, marine life, and historic wrecks.