Australia has recorded one of its hottest Septembers ever, with official climate data showing that the country's average temperature was 2.71°C above the 1961–1990 September average.
The September 2026 figures place the month as Australia's second-warmest September since national records began in 1910. Even more striking, Australia's average minimum temperature was the highest ever recorded for September.
The unusual warmth has also been felt across Australia's alpine regions, where low snow levels have added another dimension to an already remarkable weather season.
September 2026 Was Exceptionally Warm
According to Australia's Bureau of Meteorology, the country's area-averaged mean temperature during September was 2.71°C above the long-term average.
That makes September 2026 the second-highest September for mean temperature since national observations began in 1910.
The country's average maximum temperature was 2.90°C above the long-term September average, making it the third-highest September maximum temperature on record.
But the biggest temperature record came at night.
Australia's average minimum temperature was 2.52°C above the 1961–1990 average, making it the warmest September minimum temperature ever recorded nationally.
Why Warm Nights Matter
Very warm daytime temperatures often attract attention, but unusually warm nights can also have significant effects.
When temperatures remain elevated after sunset, people, ecosystems and infrastructure have less opportunity to cool down. Repeated warm nights can also increase the overall heat accumulated during a period of extreme weather.
In September 2026, the unusually high minimum temperatures were recorded across large parts of Australia, with several regions experiencing their warmest September nights on record.
Australia's East Was Much Drier
The heat was accompanied by below-average rainfall across much of the country.
Australia's national September rainfall was 17% below the 1961–1990 average. New South Wales recorded its fourth-lowest September rainfall since national observations began, while Victoria experienced its sixth-driest September.
The Murray–Darling Basin also experienced its second-driest September on record.
However, the weather pattern was not uniform across the entire country. Western Australia experienced a very different month, recording its second-wettest September on record.
The Australian Alps Are Seeing Very Little Snow
One of the most visible signs of the unusual conditions has appeared in Australia's alpine regions.
Earlier in the year, Australia's ski areas experienced an exceptionally warm winter with historically low natural snow levels. The Australian Alps had one of their poorest natural snow seasons in years, with some lower-elevation areas recording extremely limited snow cover.
That means the transition from winter into spring has occurred with unusually little natural snow remaining across parts of the mountains.
What Does El Niño Have to Do With It?
Climate conditions associated with El Niño can influence Australia's weather patterns, although individual weather events and monthly records cannot be attributed to a single factor alone.
During September, high-pressure systems played an important role in producing warm and dry conditions across large parts of southern and eastern Australia.
The Bureau of Meteorology reported that September was warmer than average across most of Australia, while dry conditions affected much of the country's eastern half.
Temperatures Reached the Mid-30s in Some Areas
The unusual warmth was not limited to national averages.
Several locations experienced temperatures far above what would normally be expected for early spring. During the month, stations across different parts of Australia recorded early-season temperature records.
In South Australia, temperatures reached 35.6°C at Parafield Airport on September 29, while Murray Bridge reached 36.2°C.
Albany in Western Australia also reached 31.8°C on September 17, setting a September daily maximum record for the station.
Australia Also Experienced Extreme Weather Swings
Despite the overall warmth, September was not simply a month of constant heat.
Australia also experienced strong cold fronts, damaging winds, heavy rainfall and isolated severe weather during the month.
Tasmania recorded powerful wind gusts during several weather systems, while parts of Western Australia experienced heavy rainfall.
This contrast highlights how a warmer overall climate does not mean every location experiences the same weather every day.
Why This Matters Beyond Australia
Australia's latest temperature data is attracting international attention because the country is highly exposed to changes in heat, rainfall, drought, bushfire risk and alpine snow conditions.
Australia is also home to ecosystems and industries that are particularly sensitive to weather patterns. Agriculture, tourism, water resources and wildfire management can all be affected when temperature and rainfall patterns move significantly away from historical averages.
For the rest of the world, Australia's climate data provides another example of how extreme weather patterns can affect different environments at the same time.
What Could Happen Next?
The Bureau of Meteorology's October-to-December outlook indicates that rainfall conditions are expected to vary considerably across Australia.
After an unusually warm and dry September across much of the country, the coming months will be closely watched by farmers, emergency services, tourism operators and communities exposed to heat and fire risk.
Scientists will also continue monitoring ocean temperatures, atmospheric patterns and rainfall because these factors can influence Australia's weather over the coming season.
A Warning Sign or a Temporary Weather Pattern?
One unusually warm month does not by itself prove that every future month will be hotter. Weather naturally varies from year to year.
However, Australia's long-term climate record shows a broader warming trend, and extreme heat events are becoming an increasingly important subject for climate researchers and policymakers.
The September 2026 numbers therefore provide both an immediate weather story and a wider climate story.
The Big Picture
Australia has just experienced its second-hottest September on record, while its average nighttime temperature reached a new September record.
At the same time, much of eastern Australia was unusually dry and the country's alpine regions continued to struggle with exceptionally low natural snow.
For millions of people, the numbers may simply look like another unusual weather report. But for scientists, farmers, ski operators and communities exposed to heat and drought, these measurements provide important information about how Australia's climate is changing.
As spring continues, attention will now turn to whether the country's unusual warmth and rainfall patterns persist through the remainder of 2026.
Journalist: Vijay Singh