September Weather in Darwin, Australia

Last updated: February 26, 2025

In September, Darwin, Australia, experiences a delightful blend of warm temperatures and low humidity, making it an ideal time for outdoor activities. With a maximum temperature soaring to 37°C (100°F) and an average temperature around 28°C (82°F), visitors can revel in the sunshine. The minimum temperature dips to 13°C (56°F), providing refreshing cool nights. Rainfall is minimal, with only 17 mm (0.7 in) of precipitation spread over just 3 days, resulting in a generally dry month. The humidity level hovers around 44%, offering a comfortable atmosphere that enhances the charm of this tropical destination.

September Temperature in Darwin

September in Darwin, Australia marks a transition towards warmer days, with temperatures reflecting the onset of the tropical climate. The minimum temperature hovers around a comfortable 13°C (56°F), while the average rises to a pleasant 28°C (82°F). As the month progresses, daytime highs can soar to a sizzling 37°C (100°F), indicating the increasing heat ahead. This month is a clear indicator of the shifting seasons, moving from the cooler winter months into the hotter period of the year. With a mix of warm days and cooler nights, September offers a lovely balance for those looking to enjoy the vibrant natural beauty of Darwin.

September Weather in Darwin: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Darwin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec828282828178787982848484
Data source: Temperature data for Darwin generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Darwin

In Darwin, Australia, September marks the transition from an incredibly dry winter to the more humid months ahead. With only 17 mm (0.7 in) of precipitation spread over 3 days, this month remains relatively dry compared to the wetter months that surround it. The stark difference from the preceding months, which saw almost negligible rainfall in June and July, highlights a gradual increase in moisture as the build-up to the wet season begins. As temperatures start to rise and humidity creeps in, September serves as a gentle reminder of the more substantial rains to come, with October's totals expected to leap to 95 mm (3.7 in) and November bringing even more significant downpours. The contrast in rainfall patterns clearly demonstrates Darwin's pronounced seasonal shifts, making September a brief but crucial interlude in the region's climate cycle.

September Precipitation Trends in Darwin

The chart displays monthly precipitation patterns in Darwin, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec39932931610472131795180256
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Darwin

In September, Darwin, Australia experiences a notable transition in humidity levels, maintaining a relatively low 44% that echoes the dry spell of the preceding months. After a peak in the wet season with January and February boasting humidities of 86% and 89%, the trend consistently declines through the year until September. The drop to 44% aligns neatly with the cooler, drier months of July and August, marking a shift towards the end of winter. As the city approaches the warmer months, the humidity is set to gradually rise again, foreshadowing the return of the tropical conditions that define Darwin's climate. Overall, September serves as a pivotal point in the annual humidity cycle, bridging the cold dry season and the imminent return of the wet season.

September Average Humidity in Darwin

This chart illustrates the average monthly humidity levels in Darwin, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec86%89%87%80%68%54%42%45%44%42%55%73%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Darwin

In September, Darwin, Australia, experiences a notable UV Index of 15, categorizing it as extreme and requiring just 10 minutes of exposure before sunburn occurs. This trend of high UV levels continues from the previous months, echoing a pattern of severe sun intensity that starts in the dry season. As we transition from the peak of winter into spring, the UV Index remains consistently high, similar to what is seen in January through August. Residents and visitors alike should be vigilant about sun safety, as the risk remains elevated leading into October, when the UV Index remains resilient at 15. For more insights on UV exposure, you can visit Darwin UV Index.

Maximum UV Index Levels in Darwin for September

The chart shows the monthly maximum UV Index (UVI) for Darwin in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec15161513119101315151516
Data source: Darwin September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Darwin

In September, Darwin, Australia, basks in the warm embrace of 308 hours of sunshine, marking a slight dip from the previous month yet still embodying the region's vibrant and sunny character. This month continues the trend of high sunshine hours that begins in the dry season, peaking with 311 hours in August. With October on the horizon, the days will grow even brighter, reaching 318 hours of sunlight, reflecting the gradual transition toward the peak of the wet season. This consistent influx of sunshine throughout the year highlights Darwin's tropical charm, making it a favored destination for those seeking the warmth and glow of the Australian sun.

Monthly Sunshine Duration in Darwin: September Highlighted

The September sunshine duration represents the total number of hours Darwin experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec195h230h267h277h301h294h303h311h308h318h309h288h
Data source: Darwin September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Darwin During September

In Darwin, Australia, the likelihood of sunny weather in September remains fairly high, with a 55% chance of basking in the sunshine. This month experiences a noticeable dip from the peak sunshine months of June to August, which showcase probabilities of around 54% to 72% respectively. Notably, as the year transitions from the wet season towards the dry season, we observe an upward trend in sunshine chances from April’s modest 38% to the summery heights of May and June. September’s weather continues to be a pleasant blend of warmth and sunshine, albeit hinting at the onset of the more variable conditions that emerge in the following months, especially October with a lower 45% chance. Overall, September offers a delightful window for those seeking sunny escapades in this vibrant tropical city.

Percentage of Sunny Days in September in Darwin

The chart illustrates the percentage of sunny days in Darwin throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Darwin experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec6%3%14%38%68%54%60%72%55%45%30%17%
Data source: Darwin September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Darwin in September

As September arrives in Darwin, Australia, the city experiences a delightful return to 12 hours of daylight, reminiscent of the sun-filled days of summer. The trend of daylight duration reveals a captivating pattern: from January to August, the days gradually shift from a steady 12 hours to a reduced 11 hours in the cooler months, before springing back to 12 hours in both September and October. This cyclical dance of daylight not only highlights the unique climate of Darwin but also signals the transition into warmer seasons, inviting both locals and visitors to revel in the abundant sunshine that characterizes this vibrant tropical city.

Average Daylight Hours in Darwin for September

The chart illustrates the variation in daylight duration in Darwin throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec12h 45m12h 29m12h 8m11h 48m11h 31m11h 23m11h 27m11h 41m12h 1m12h 21m12h 40m12h 49m
Data source: Darwin daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Darwin

As September rolls into Darwin, Australia, the wind takes on a gentle, refreshing demeanor with an average speed of 2.6 m/s (6 mph). This slight uptick from the lower speeds of July and August hints at a subtle transition in the season. Overall, the winds have exhibited a gradual decline since the breezier months at the start of the year, with January and February enjoying the highest averages of around 3.1 m/s and 3.3 m/s respectively. As the year progresses into the final quarter, September's winds maintain a moderate pace, perfectly complementing the warm tropical climate and inviting outdoor activities. The consistent yet soft breezes create an idyllic backdrop for Darwin's vibrant atmosphere, making it an enchanting time of year for locals and visitors alike.

Average September Wind Speed in Darwin

The chart displays monthly wind speed patterns in Darwin, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.13.32.62.42.82.52.32.32.6 m/s2.52.22.9
Data source: Darwin September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Darwin Compares to Other Months

The weather in Darwin 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 Darwin and find detailed weather information for every month.

September and January present contrasting weather experiences. September offers warm temperatures, with a minimum of 13°C (56°F) and an average high of 28°C (82°F), making it a popular time for outdoor activities. Precipitation is relatively low in September, with only 17 mm (0.7 in) falling over just three days, and humidity sits at a comfortable 44%. In contrast, January is significantly wetter and more humid. The minimum temperature rises to 24°C (75°F), while the average remains steady at 28°C (83°F). However, the maximum temperature is lower, reaching only 34°C (93°F). The month experiences heavy rainfall, totaling 399 mm (15.7 in) over 23 rainy days, creating a much more humid environment with 86% humidity. For more details, you can check Darwin weather in January.

When comparing the weather in September and February, it's evident that they present contrasting climates. September typically has milder temperatures, with a minimum of 13°C (56°F), an average of 28°C (82°F), and a maximum of 37°C (100°F). Precipitation is relatively low at 17 mm (0.7 in) over just 3 days, along with a humidity level of 44%.

In contrast, February experiences much warmer nights, with a minimum temperature of 23°C (74°F), and while the average temperature remains similar at 28°C (83°F), the maximum drops slightly to 36°C (96°F). However, February is characterized by significantly higher rainfall, totaling 329 mm (13.0 in) over 24 days, which leads to a much higher humidity level of 89%. For more detailed information, you can check Darwin weather in February.

In comparing the weather between September and March, notable differences emerge. September features a range of temperatures from a comfortable minimum of 13°C (56°F) to a scorching maximum of 37°C (100°F), with an average temperature of 28°C (82°F). The month experiences relatively low precipitation, with only 17 mm (0.7 in) recorded over just three days and a humidity level of 44%. In contrast, March boasts a much warmer minimum temperature of 23°C (74°F) and a maximum of 35°C (96°F), maintaining an average of 28°C (83°F). This month is characterized by significant rainfall, with a staggering 316 mm (12.4 in) falling over 27 days and a much higher humidity of 87%. For further details on March weather, you can visit Darwin weather in March.

September and April offer contrasting weather experiences. In September, temperatures range from a comfortable minimum of 13°C (56°F) to a hot maximum of 37°C (100°F), with an average of 28°C (82°F). The month features relatively low precipitation, totaling just 17 mm (0.7 in) over about 3 days, and humidity sitting at a moderate 44%. In contrast, April presents a warmer minimum of 19°C (67°F) and a similar average of 28°C (83°F), with maximum temperatures reaching up to 36°C (97°F). However, April is significantly wetter, with 104 mm (4.1 in) of rainfall spread across 12 days and much higher humidity levels at 80%. For a more detailed look at April's weather in Darwin, check out Darwin weather in April.

When comparing the weather in September and May, it becomes clear that both months exhibit warm temperatures, yet they differ in several key aspects. September boasts a temperature range from a minimum of 13°C (56°F) to a maximum of 37°C (100°F), with an average of 28°C (82°F). Precipitation is relatively low at 17 mm (0.7 in) over three days, accompanied by a humidity level of 44%. In contrast, May has a slightly higher minimum temperature of 18°C (64°F) and an average of 27°C (81°F), with a maximum temperature reaching 36°C (96°F). Additionally, May experiences significantly less precipitation, with only 7 mm (0.3 in) across just one day, but comes with higher humidity at 68%. For more detailed information, you can check Darwin weather in May. Overall, while September feels hotter during the day, May is characterized by more humid conditions and milder evenings.

September and June showcase distinct weather patterns. In September, temperatures are warmer, ranging from a minimum of 13°C (56°F) to a maximum of 37°C (100°F), with an average of 28°C (82°F). The month experiences slightly more precipitation, averaging 17 mm (0.7 in) over three days, and boasts a lower humidity level of 44%. In contrast, June features cooler temperatures, with a minimum of 13°C (56°F) and a maximum of 35°C (96°F), averaging 25°C (78°F). Notably, June sees minimal rainfall, only 2 mm (0.1 in) across no days, but has a higher humidity rate at 54%. For a closer look at the weather specifics in June, visit Darwin weather in June.

In comparing the weather between September and July, September tends to be warmer overall, with average temperatures rising to 28°C (82°F) compared to July's average of 25°C (78°F). The maximum temperatures in September can reach up to 37°C (100°F), surpassing July's peak of 35°C (95°F). Additionally, September experiences slightly more precipitation, with 17 mm (0.7 in) over three days, while July is notably drier with only 1 mm (0.0 in) of rain across the month and no rainy days at all. Humidity levels are similar, remaining around 44% in September and 42% in July. For more insights into July's climate, visit Darwin weather in July.

In comparing the weather of September and August, September tends to be slightly warmer with an average temperature of 28°C (82°F), compared to August's average of 26°C (79°F). While both months have the same humidity level at 44%, September experiences higher maximum temperatures, reaching up to 37°C (100°F) compared to August's peak of 36°C (98°F). Additionally, September sees more rainfall, with a total of 17 mm (0.7 in) of precipitation over 3 days, whereas August has only 3 mm (0.1 in) over just one day. For more detailed information, visit Darwin weather in August.

In September, temperatures in the region range from a minimum of 13°C (56°F) to a maximum of 37°C (100°F), with an average of 28°C (82°F). The month experiences relatively low precipitation, totaling 17 mm (0.7 in) over just 3 days and maintaining a humidity level of 44%. In contrast, October brings slightly warmer conditions, with a minimum temperature of 20°C (69°F) and an average of 29°C (84°F), peaking at 38°C (101°F). However, it also sees a significant increase in rainfall, accumulating 95 mm (3.7 in) across 13 days, while the humidity remains comparable at 42%. For more details on the October weather, you can check Darwin weather in October.

In September, the weather is characterized by warm temperatures, with a minimum of 13°C (56°F) and averages reaching 28°C (82°F), peaking at 37°C (100°F). Precipitation is relatively low, with only 17 mm (0.7 in) recorded over 3 days and humidity sitting at a comfortable 44%. In contrast, November sees an increase in both temperatures and rainfall. The minimum temperature rises to 22°C (72°F), with an average of 29°C (84°F) and a maximum reaching 37°C (99°F), while precipitation soars to 180 mm (7.1 in) over 22 days, resulting in higher humidity levels at 55%. For more detailed information, you can check Darwin weather in November.

When comparing the weather in September and December, it’s clear that September offers warmer days with average temperatures reaching 28°C (82°F) and a maximum of 37°C (100°F). The month experiences relatively low humidity at 44% and minimal precipitation, with only 17 mm (0.7 in) falling over just 3 days. In contrast, December presents a more humid atmosphere, with an average temperature slightly higher at 29°C (84°F) and a maximum of 36°C (98°F). However, it is significantly wetter, receiving 255 mm (10.1 in) of rainfall over 22 days, leading to a humidity level of 73%. For more detailed information on December weather, check out Darwin weather in December.

Compare Darwin's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Darwin

As September rolls into Darwin, the weather showcases a notable transition from the chilly winter months, welcoming warmer temperatures and drier conditions. With average highs hitting a comfortable 28°C, the month offers a pleasant climate for outdoor activities, making it a popular time for both locals and tourists. Unlike the wetter season that follows, September sees minimal rainfall, with only a few days experiencing light precipitation, allowing for plenty of sunshine and low humidity levels. This delightful balance of warmth and dry weather sets the stage for the upcoming dry season, ensuring September is a favored month for enjoying all that Darwin has to offer. For more insights, check out Darwin Climate.