Last updated: February 26, 2025
Experience the mild charm of Cairns, Australia in September, where the climate offers a delightful blend of warm days and cooler nights. With maximum temperatures reaching 27°C (80°F) and a pleasant average of 21°C (70°F), outdoor adventures abound. The evenings cool down to a minimum of 14°C (57°F), making for cozy nights under the stars. While the month sees 21 mm (0.8 in) of rainfall spread across about 5 days, the humidity hovers around 72%, adding a touch of tropical richness to the air. Embrace the vibrant ambiance of Cairns in September, perfect for exploring its natural beauty and outdoor activities!
In September, Cairns experiences a gentle transition from the cooler months of winter, with temperatures ranging from a mild 14°C (57°F) at night to a pleasant 27°C (80°F) during the day. The average temperature rises to 21°C (70°F), signaling the approach of spring and more stable, warmer weather. This shift is noticeable when compared to the preceding months, where lows were often in the low teens. As the days grow longer and more inviting, locals and visitors alike can savor the balmy conditions, perfect for exploring the stunning natural scenery and vibrant marine life that Cairns has to offer. It's a time when the tropical charm of this coastal city begins to truly flourish.
In Cairns, Australia, September marks a slight uptick in precipitation, registering just 21 mm (0.8 in) over 5 days, a modest increase from the preceding months. This transition signifies the end of the dry season, as the city gradually shifts from the driest August recorded with merely 19 mm (0.7 in). September's light rains hint at the approaching wet season, which typically brings heavier rainfall in the following months. Despite remaining relatively dry, this uptick serves as a gentle reminder of Cairns' tropical climate, where even the slightest rainfall can invigorate the lush surroundings and set the stage for a more humid October and November ahead.
As the warm embrace of summer fades, September in Cairns, Australia, brings a refreshing shift in humidity levels, dipping to 72%. This decline marks the end of the wetter months, where humidity peaks at a steamy 83% in March. Following the gradual decrease starting mid-year, with July and August recording the lowest levels in the period, September remains comfortable yet slightly damp, hinting at the transition towards the spring season. As the months progress towards October and November, humidity begins to creep up again, reminding residents and visitors alike of Cairns' tropical allure.
In Cairns, Australia, the UV Index remains consistently high throughout the year, particularly during the summer months. September sees a UV Index of 14, categorized as extreme, with a quick burn time of just 10 minutes. This trend reflects the region's intense sun exposure, continuing from the winter months where the index was slightly lower at 12 in August. As we move into October and November, expect similar extreme values, reinforcing the need for sun protection. With January and February leading the pack with a remarkable 16, it’s clear that the sun's intensity in Cairns is a year-round concern. For those looking to enjoy the outdoors, understanding these UV fluctuations is essential for safety in the sun. For more detailed information, check the Cairns UV Index.
UV Risk Categories
September shines brightly in Cairns, Australia, boasting an impressive 298 hours of sunshine. As the winter months wane, this surge in sunlight marks the continuation of a positive trend leading into spring. After a steady increase from August's 293 hours, the days now glow with a promise of warmth and outdoor adventure, setting the stage for an even brighter October ahead, which offers 321 hours. This consistent rise in sunshine not only enhances the vibrant natural beauty of the region but also invites locals and tourists alike to embrace the charms of Cairns in this dazzling transition from winter to spring.
September in Cairns, Australia, enjoys a moderate 46% chance of sunny weather, making it one of the more favorable months for sun-seekers. As we transition from the drier winter months of July and August—where the sun's presence was fairly consistent at 51% and 49%—the likelihood of sunny days remains respectable. While it does dip slightly in comparison to the upcoming peak in October, which boasts a 58% chance, September is still a solid choice for those looking to soak up some sunshine. Overall, the gradual increase in sunny weather from the earlier months underscores Cairns's appeal as a vibrant destination for both relaxation and adventure.
As September rolls into Cairns, Australia, daylight hours settle at a consistent 11 hours—a slight dip that mirrors the experienced pattern from April to August. This month serves as a gentle transition, hinting at the approaching warmth of spring, which will soon rejuvenate daylight to 12 hours in October. The gradual ebb and flow of sunshine, peaking at 13 hours during the height of summer in January and December, underscores a rhythmic balance of light that characterizes Cairns throughout the year. September, with its vibrant skies and moderate daylight, invites residents and visitors alike to savor the lingering days before summer's return.
As September rolls into Cairns, Australia, the winds begin to pick up, reaching an average speed of 4.3 m/s (10 mph)—a notable increase that signals the arrival of spring. This month marks a peak in wind strength compared to the calmer days of mid-winter, where speeds dipped as low as 2.8 m/s (6 mph) in July. The gradual climb from the softer breezes of February and March, which lingered around 2.4 m/s (5 mph) and 3.2 m/s (7 mph) respectively, showcases a distinct trend: as the year progresses toward September, the winds tend to gain vigor. This invigorating change not only ushers in warmer temperatures but also sets the stage for outdoor adventures and a refreshingly dynamic atmosphere, inviting locals and visitors alike to engage with the beauty of the region.
The weather in Cairns changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Cairns and find detailed weather information for every month.
In September, the weather is mild and pleasant, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), and an average of 21°C (70°F). The month typically sees 21 mm (0.8 in) of precipitation over about five days, maintaining a humidity level of around 72%. In contrast, January brings significantly warmer conditions, with temperatures ranging from a minimum of 21°C (70°F) to a scorching maximum of 33°C (92°F), and an average of 26°C (78°F). This month is also characterized by heavy rainfall, accumulating 400 mm (15.7 in) over 21 days, along with a slightly higher humidity of 79%. For more details on January weather, you can visit Cairns weather in January.
September and February present quite contrasting weather patterns. In September, temperatures range from a mild minimum of 14°C (57°F) to an average of 21°C (70°F), peaking at 27°C (80°F), with a modest 21 mm (0.8 in) of precipitation over about 5 days and humidity levels at 72%. In stark contrast, February experiences warmer temperatures, with a minimum of 18°C (65°F), an average of 26°C (79°F), and highs reaching up to 35°C (95°F). However, February is also significantly wetter, receiving 287 mm (11.3 in) of rainfall over 21 days, coupled with a higher humidity of 81%. This shift in weather patterns highlights the transition from the dry to the wet season in Cairns. For more information, you can check out Cairns weather in February.
In comparing the weather between September and March, notable differences emerge. September showcases milder temperatures, with a minimum of 14°C (57°F) and an average high of 27°C (80°F), accompanied by relatively low precipitation of 21 mm (0.8 in) across only 5 days, and a humidity level of 72%. In contrast, March experiences significantly warmer conditions, where temperatures range from a minimum of 21°C (69°F) to a maximum of 33°C (91°F). However, this month is much wetter, with precipitation soaring to 289 mm (11.4 in) over 24 days and an increased humidity of 83%. For more detailed insights, you can check Cairns weather in March.
When comparing the weather in September and April, there are notable differences. September generally features milder temperatures, with a minimum of 14°C (57°F) and a maximum of 27°C (80°F), leading to a warm average of 21°C (70°F). In contrast, April experiences warmer conditions, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 31°C (88°F), resulting in an average of 24°C (75°F). Additionally, precipitation patterns shift significantly between the two months; September sees only 21 mm (0.8 in) of rain over about 5 days, while April is much wetter, with 163 mm (6.4 in) of rain spread across 15 days. Humidity is also slightly higher in April at 80%, compared to September's 72%. For more detailed information, you can check Cairns weather in April.
In comparing the weather of September to that of May, both months showcase pleasantly warm temperatures, with average highs reaching similar levels of 27°C (81°F). September tends to have a slightly more comfortable humidity level at 72%, while May's humidity rises to 78%, contributing to a more humid feel. Precipitation is notably different, with September experiencing only 21 mm (0.8 in) over 5 days, in contrast to May's rainfall of 51 mm (2.0 in) across 13 days, indicating a wetter month. For more detailed insights regarding the weather in May, you can explore Cairns weather in May.
In comparing the weather between September and June, both months feature similar maximum temperatures peaking at 27°C (80°F), creating warm conditions. However, September has a slightly higher average temperature of 21°C (70°F) compared to June's 20°C (68°F). June experiences more precipitation, with a total of 37 mm (1.5 in) over 11 days, while September sees only 21 mm (0.8 in) spread across 5 days. Additionally, humidity is typically higher in June at 78%, compared to September's 72%. For a more detailed look at June weather, you can check Cairns weather in June.
In comparing the weather of September and July, we see some notable differences. September enjoys slightly warmer temperatures, with averages reaching up to 21°C (70°F) compared to July's average of 20°C (68°F). Additionally, September tends to be drier, receiving only 21 mm (0.8 in) of precipitation over five days, whereas July experiences more rain, totaling 33 mm (1.3 in) across seven days. Humidity levels remain similar, with September at 72% and July at 71%. For a closer look at July's conditions, you can check Cairns weather in July.
September weather shows a slight increase in average temperature compared to August, with September's average reaching 21°C (70°F) while August averages at 20°C (68°F). The maximum temperature in September peaks at 27°C (80°F), slightly lower than August's high of 29°C (84°F). Precipitation is minimal in both months, with September receiving 21 mm (0.8 in) over 5 days and August slightly less at 19 mm (0.7 in) over 4 days. Humidity levels are also comparable, with September at 72% and August at 75%. For more specific details about August's weather, visit Cairns weather in August.
In September, temperatures typically range from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), with an average temperature of 21°C (70°F). The month sees about 21 mm (0.8 in) of precipitation over 5 days, and humidity levels hover around 72%. In contrast, October brings slightly warmer weather, with temperatures ranging from a minimum of 15°C (59°F) to a maximum of 29°C (84°F), and an average temperature of 23°C (74°F). However, October also experiences increased rainfall, totaling 35 mm (1.4 in) over the same 5 days, accompanied by a similar humidity level of 73%. For more detailed weather information, visit Cairns weather in October.
In September, the weather is relatively mild, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), and an average of 21°C (70°F). There’s a modest amount of precipitation, totaling 21 mm (0.8 in) over about 5 days, while humidity sits at 72%.
Contrastingly, November experiences higher temperatures, with a minimum of 19°C (66°F) and a maximum soaring up to 34°C (94°F), resulting in an average of 24°C (76°F). The month is also wetter, featuring 38 mm (1.5 in) of rain over 11 days, along with slightly elevated humidity at 74%.
For more detailed information about the weather in November, you can check Cairns weather in November.
In comparing the weather between September and December, we see a marked increase in temperature during December, with minimums around 21°C (70°F) and maximums reaching up to 33°C (92°F), compared to September's cooler range of 14°C (57°F) to 27°C (80°F). Precipitation also differs significantly; September experiences only 21 mm (0.8 in) of rain over five days, while December sees a substantial increase to 166 mm (6.5 in) over 15 days. Despite this uptick in rainfall, December's humidity remains relatively similar, sitting at 75%, just slightly higher than September's 72%. For more detailed information, you can check out Cairns weather in December.
In September, Cairns enjoys a delightful transition into spring, showcasing warmer temperatures and a decrease in rainfall compared to the wetter months preceding it. The weather becomes increasingly inviting, with average highs that encourage outdoor activities and a pleasant atmosphere characterized by humidity levels around 72%—balancing comfort and warmth. While a few showers may still occur throughout the month, they are infrequent, making September an ideal time to explore the stunning landscapes without the heavy downpours typical of other seasons. For more insights into the yearly weather patterns, check out Cairns Climate.