Last updated: February 25, 2025
Experience the diverse weather of Adelaide Hills, Australia, in September, where temperatures can soar up to 29°C (84°F) during the day and drop to a brisk 1°C (34°F) at night. With an average temperature of 12°C (54°F), this month demonstrates the region's variable climate. Expect some rain, as 44 mm (1.7 in) of precipitation is spread over 10 days, contributing to a 65% humidity level that enhances the lush landscape. Whether you’re enjoying sunny afternoons or crisp mornings, September offers a captivating blend of conditions perfect for exploring the beauty of the Adelaide Hills.
As September arrives in the Adelaide Hills, the lingering chill of winter begins to fade, giving way to a gentle warmth that hints at the upcoming spring. Temperatures see a noticeable rise, with minimums resting at 1°C (34°F), and averages climbing to 12°C (54°F). Days become increasingly pleasant, peaking with maximums of 29°C (84°F), inviting residents and visitors alike to enjoy the blossoming landscape. This transition reflects a broader trend of warming after the cooler months, making September a delightful time to experience the natural beauty and outdoor activities that the region has to offer. As the air becomes milder, it sets the stage for the vibrant colors and life that spring promises.
In September, the Adelaide Hills contrasts the peak rainfall of winter with a more moderate precipitation of 44 mm (1.7 in), falling over 10 days. This marks a noticeable decrease from the 68 mm (2.7 in) received in August, signaling a transition towards the drier months. Despite this dip, September still maintains a significant amount of rainfall, reflecting the tail end of the cold season, while paving the way for the warmer, sunnier days of spring. With precipitation gradually tapering off, one can expect a vibrant burst of blooms as the landscape awakens from its winter slumber. Overall, the trend suggests that September is a pivotal month, balancing the lingering effects of winter rains with the approach of spring's dry warmth.
As September unfolds in the Adelaide Hills, humidity begins to wane from its peak summer levels, settling at a notable 65%. Following the lush, moisture-filled months of winter, which consistently hovered around 76%, the decrease marks a gradual transition towards the drier months ahead. This trend is reminiscent of the conditions observed in October, where humidity dips further to 51%, hinting at the arrival of the warmer weather. Overall, September serves as a bridge, blending the residual moisture from the cooler months while paving the way for the more arid days of spring.
As September unfolds in the Adelaide Hills, residents experience a notable shift in ultraviolet (UV) radiation levels, with the UV index rising to 8, categorized as very high. This reflects a transition from the moderate levels of winter, where the UV index hovered between 3 and 5, to the more intense conditions typical of the approaching summer months. With a burn time of just 15 minutes, sun safety becomes imperative, urging outdoor enthusiasts to take precautions. This month sets the stage for the subsequent climb in UV ratings, foreshadowing the extreme levels that characterize the later months of the year. For those looking to stay informed about UV trends and safety, the Adelaide Hills UV Index is an essential resource.
UV Risk Categories
As September unfolds in the Adelaide Hills, it heralds the return of more abundant daylight with 275 hours of sunshine, a welcome shift from the cooler, shorter days of winter. The region basks in a warm embrace, gradually climbing from the previous months' lower totals, most notably outperforming June and July, which saw only 221 and 237 hours respectively. This upward trend is invigorating, hinting at the joys of spring just around the corner. Following September's emergence, the sun continues to shine brighter into October and November, setting a stunning stage for the lush landscapes and vibrant flora that define the region. With each passing month, the lengthening days promise not only beautiful weather but also the perfect backdrop for outdoor adventures in the breathtaking Adelaide Hills.
In the beautiful Adelaide Hills, September ushers in a modest 53% chance of sunny weather, offering a pleasant transition from winter's chill. This marks a slight uptick from the cooler months of July and June, both hovering around 35%, as residents eagerly anticipate the onset of spring. While the sun begins to peek through more often than in the earlier months, it remains less frequent than the balmy days of summer, which see chances rise to an impressive 58% in January and 71% in December. Overall, September balances the lingering vestiges of winter with the promise of warmer days ahead, making it an enchanting time for both locals and visitors to explore the region's stunning landscapes.
As September arrives in the Adelaide Hills, the transition from winter to spring is marked by a gradual increase in daylight, with the sun gracing the sky for 11 hours each day. This is a welcome change after the shorter days of winter, signaling the start of warmer months ahead. The trend of daylight duration has a cyclical nature, peaking at 14 hours in January and December, while gently declining to a low of 9 hours in June. After the chill of winter, September begins a slow ascent toward longer, sunnier days, paving the way for the vibrant colors and life that spring brings to this picturesque region.
As the seasons shift into September in the Adelaide Hills, a noticeable increase in wind speed stirs the landscape, averaging 4.1 m/s (9 mph)—a refreshing contrast to the calmer summer months. Following a gradual dip from January's breezy 3.7 m/s, the winds began to pick up in the cooler winter months, peaking in July at 4.7 m/s (10 mph). This trend stabilizes slightly in August before climbing again in September. Overall, the early spring breeze not only invigorates the air but also heralds the approach of warmer days, making it an ideal time for outdoor activities amidst the stunning backdrop of Adelaide's rolling hills.
The weather in Adelaide Hills 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 Adelaide Hills and find detailed weather information for every month.
September and January present contrasting weather patterns. In September, temperatures range from a chilly minimum of 1°C (34°F) to a comfortable average of 12°C (54°F), peaking at a warm 29°C (84°F). This month sees about 44 mm (1.7 in) of precipitation over 10 days, accompanied by a higher humidity level of 65%. In stark contrast, January boasts significantly warmer temperatures, with a minimum of 9°C (49°F), an average of 21°C (71°F), and a scorching maximum reaching 45°C (114°F). Rain is much less common in January, with only 15 mm (0.6 in) accumulated over just 2 days, and humidity drops to a comfortable 41%. For more details on the weather during this time, you can visit Adelaide Hills weather in January.
September weather is characterized by cooler temperatures, with a minimum of 1°C (34°F) and an average of 12°C (54°F), making it a transitional month as spring approaches. It experiences higher precipitation, with 44 mm (1.7 in) spread over about 10 days, resulting in a relative humidity of 65%. In contrast, February is significantly warmer, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 39°C (103°F) and an average of 20°C (68°F). It boasts much less rainfall, with only 19 mm (0.8 in) over just 3 days, and a lower humidity level of 46%. For more details, you can check the Adelaide Hills weather in February.
When comparing the weather in September and March, it's clear that March tends to be warmer overall. In September, temperatures range from a chilly 1°C (34°F) at night to a pleasant max of 29°C (84°F) during the day, with an average of 12°C (54°F). In contrast, March sees a higher minimum temperature of 8°C (46°F) and can peak at a scorching 39°C (103°F), averaging around 19°C (66°F). Additionally, September experiences more rainfall, with 44 mm (1.7 in) over 10 days, while March is significantly drier, receiving only 13 mm (0.5 in) in just 3 days. Humidity is also higher in September at 65%, compared to 55% in March, making March feel a bit more comfortable. For more detailed insights into March weather, you can check out Adelaide Hills weather in March.
In comparing the weather of September and April, notable differences emerge. September experiences a wider temperature range, with lows of 1°C (34°F) and highs reaching up to 29°C (84°F), while averaging at 12°C (54°F). In contrast, April sees milder minimum temperatures starting at 5°C (41°F), with an average of 16°C (61°F) and maximums soaring to 35°C (95°F). Additionally, precipitation is more frequent in September, with 44 mm (1.7 in) accumulating over 10 days, compared to only 27 mm (1.0 in) over 4 days in April. Humidity levels remain similar, hovering around 65-66%. For more detailed insights, check out the Adelaide Hills weather in April.
September and May exhibit some notable differences in weather. September sees a broader temperature range, with minimum temperatures dipping to 1°C (34°F) and maximums reaching 29°C (84°F), while May's temperatures are slightly warmer, ranging from a minimum of 3°C (38°F) to a maximum of 27°C (81°F). Precipitation is fairly similar, with September averaging 44 mm (1.7 in) over about 10 days, compared to May's 47 mm (1.8 in) over 9 days. Additionally, May tends to be more humid, with an average humidity of 73%, contrasted with September's 65%. For more detailed insights on weather in May, check out Adelaide Hills weather in May.
In comparing the weather of September and June, September tends to be warmer, with an average temperature of 12°C (54°F) and a maximum of 29°C (84°F), whereas June sees cooler averages, with a maximum of only 20°C (68°F). Both months experience similar levels of precipitation, around 44-45 mm (1.7-1.8 in), with rain falling on approximately 10 days. However, June is notably more humid at 76%, compared to September's 65%. For more detailed insights into June's climate, you can explore the Adelaide Hills weather in June.
In comparing the weather between September and July, we can see notable differences in temperature and rainfall. September enjoys a wider temperature range with a minimum of 1°C (34°F), an average of 12°C (54°F), and a maximum of 29°C (84°F), making it generally warmer than July, which has a minimum of 1°C (34°F), an average of 10°C (50°F), and a maximum of 19°C (67°F). Additionally, September experiences less precipitation at 44 mm (1.7 in) over about 10 days, compared to July's 59 mm (2.3 in) across 12 days. Furthermore, September has a lower humidity level at 65%, while July's humidity sits higher at 76%. For a more detailed exploration of July's weather, you can visit Adelaide Hills weather in July.
In comparing the weather between August and September, September typically sees a noticeable increase in temperature, with a minimum of 1°C (34°F) and a maximum of 29°C (84°F), compared to August's minimum of -1°C (31°F) and maximum of 23°C (73°F). The average temperature also rises from 10°C (50°F) in August to 12°C (54°F) in September. While September has slightly lower precipitation at 44 mm (1.7 in) over about 10 days of rain, August experiences more rainfall at 68 mm (2.7 in) across 13 days. Humidity remains relatively consistent, with September at 65% compared to August's 70%. For more detailed insights, you can check Adelaide Hills weather in August.
September and October exhibit distinct weather patterns. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), with an average temperature of 12°C (54°F). This month sees approximately 44 mm (1.7 in) of precipitation over 10 days, and humidity levels are at 65%.
In contrast, October offers slightly warmer conditions, with temperatures varying from a minimum of 4°C (39°F) to a maximum of 35°C (95°F) and an average temperature of 14°C (58°F). Precipitation decreases to 39 mm (1.5 in) over just 7 days, and humidity drops to 51%. For more detailed information, you can check Adelaide Hills weather in October.
In comparing the weather of September and November, we see notable differences in temperature and humidity. September experiences a wider temperature range, with minimums dipping to 1°C (34°F) and maximums reaching up to 29°C (84°F), while November is generally milder, with temperatures ranging from a minimum of 5°C (41°F) to maximums soaring to 41°C (105°F). Additionally, September records a higher humidity level at 65%, compared to November's 50%, creating a more comfortable atmosphere as the month progresses. Interestingly, both months have comparable precipitation levels, with September receiving 44 mm (1.7 in) over 10 days and November slightly less at 41 mm (1.6 in) over just 7 days. For more specific insights on conditions in November, you can check Adelaide Hills weather in November.
In September, temperatures in the Adelaide region range from a cool minimum of 1°C (34°F) to a warm maximum of 29°C (84°F), with an average temperature of 12°C (54°F). The month sees around 44 mm (1.7 in) of precipitation over approximately 10 days, contributing to a humidity level of 65%. In contrast, December features much warmer temperatures, with a minimum of 6°C (44°F), an average of 19°C (67°F), and a scorching maximum of 43°C (109°F). Precipitation drops significantly to 17 mm (0.7 in) over just 4 days, and humidity decreases to 46%. For more detailed insights, you can check Adelaide Hills weather in December.
As September ushers in the first signs of spring, the weather in the Adelaide Hills starts to transform dramatically. Temperatures begin to rise, with pleasant warm days interspersed among cooler nights, creating a refreshing contrast to the winter chill that precedes it. While the amount of rainfall remains moderate, with about 10 days of precipitation, the increased humidity adds to the vibrant atmosphere of the season. This month represents a delightful transition, making it the perfect time to explore the beauty of the landscape. For more detailed insights, visit Adelaide Hills Climate.