September Weather in Auckland, New Zealand

Last updated: August 31, 2025

September in Auckland, New Zealand, heralds the arrival of spring, bringing a refreshing mix of mild temperatures and occasional rainfall. With maximum temperatures averaging around 20°C (68°F) and a comfortable mean of 13°C (56°F), days can be pleasantly warm, while nights dip to a cool 6°C (43°F). However, the city experiences 111 mm (4.4 in) of precipitation spread over 14 days, making it essential to be prepared for the occasional shower. Coupled with a humidity level of 80%, September in Auckland presents a vibrant yet damp environment that fosters the blooming of lush landscapes, inviting locals and visitors alike to enjoy the natural beauty of the season.

September Temperature in Auckland

As September rolls in, Auckland, New Zealand begins to shed the chill of winter, with temperatures gradually warming up. The month sees minimums of 6°C (43°F) and averages around 13°C (56°F), while the maximum temperature reaches a pleasant 20°C (68°F). This notable rise from the cooler months of July and August hints at the arrival of spring, as the city transitions into brighter and more temperate weather. It's a perfect time to experience the blossoming landscapes, with nature awakening alongside the rising mercury, making outdoor activities increasingly appealing.

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

The chart illustrates September temperature patterns in Auckland, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Auckland, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec686967645956545556596367
Data source: Temperature data for Auckland 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 Auckland

As September rolls into Auckland, the city experiences moderate precipitation, recording 111 mm (4.4 in) of rain over 14 days, a slight dip from the preceding month of August, which saw the highest rainfall of 114 mm (4.5 in) spread across 15 days. This brief transition from winter to spring heralds a change in the weather, as the rainfall in September often helps rejuvenate the lush landscapes of New Zealand, setting the stage for the warmer months ahead. Despite the decrease, the rain continues to play a vital role in sustaining the region's vibrant flora and ensuring that the verdant surroundings remain beautifully alive.

September Precipitation Trends in Auckland

The chart displays monthly precipitation patterns in Auckland, 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. In Auckland, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec56788810084107102114111818072
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Auckland

As summer transitions to spring in Auckland, September maintains a comfortable humidity level of 80%, mirroring the previous few months. This consistent humidity reflects a pattern typical for this time of year, where moisture in the air tends to stabilize before the warmer months arrive. Following the spike in humidity during the winter months of June and July, which peak at 82% and 83% respectively, September's level indicates a gradual return to a more temperate climate. Interestingly, the monthly averages reveal a trend where humidity generally hovers between 74% and 80% during the spring and early summer, providing a pleasant balance that makes Auckland's climate uniquely inviting.

September Average Humidity in Auckland

This chart illustrates the average monthly humidity levels in Auckland, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Auckland is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%76%74%75%80%82%83%81%80%80%80%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Auckland

As we transition into September, Auckland experiences a shift in its UV Index, landing at 7, which falls into the high exposure category. This indicates a remarkable increase from the more moderate levels seen in the winter months of June and July, where the index hovered around 3. With a burn time of just 25 minutes, it's essential for residents and visitors to stay vigilant about sun protection. The pattern reveals that while early spring still requires caution, the UV Index is gearing up for its peak as the year progresses. With the index set to climb in the following months, including October's return to 10, now is the perfect time to brush up on sun safety habits. For detailed information on the UV Index throughout the year, check out Auckland UV Index.

Maximum UV Index Levels in Auckland for September

The chart shows the monthly maximum UV Index (UVI) for Auckland 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. In September, the maximum UV index in Auckland typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141410743357101113
Data source: Auckland 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 Auckland

As September unfolds in Auckland, the city basks in 259 hours of sunshine, marking a delightful transition from the cooler months. This modest rise from August's 234 hours heralds the approach of warmer days, setting an optimistic tone for the spring season. The trend indicates a steady increase in daylight, with September's average nearly aligning with the sun-drenched heights of summer months, such as January and February, both enjoying over 280 hours. As the days lengthen leading into October—with its 284 hours—Aucklanders are reminded of nature's rhythmic cycle, where each unfolding month promises more warmth and light, invigorating the spirit and inviting outdoor adventures.

Monthly Sunshine Duration in Auckland: September Highlighted

The September sunshine duration represents the total number of hours Auckland 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.
JanFebMarAprMayJunJulAugSepOctNovDec284h282h287h235h216h187h214h234h259h284h306h346h
Data source: Auckland September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Auckland During September

In September, Auckland experiences a 38% chance of sunny weather, marking the transition from winter into the early spring months. This likelihood is relatively low compared to the sunnier summer months of January and February, which boast chances of 48% and 42%, respectively. Interestingly, September shares a similar trend with March and April, both at 42%. Although the sunshine opportunities begin to decline into the late spring and early summer, September still holds onto a modest chance for clear skies, making it a refreshing period for those craving the last glimpses of winter sun before the rainy season kicks in. The gradually brightening days hint at the warmer months ahead, encouraging outdoor explorations as nature begins to bloom.

Percentage of Sunny Days in September in Auckland

The chart illustrates the percentage of sunny days in Auckland 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 Auckland experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec48%42%42%39%40%39%43%41%38%28%36%25%
Data source: Auckland September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Auckland in September

As September arrives in Auckland, daylight begins to reclaim its dominance, stretching to approximately 11 hours. This marks a gentle increase from the winter months of June and July, which were characterized by only 9 hours of light. The transition into spring brings a refreshing boost in daylight after the shorter days of winter, allowing residents to enjoy more sunlight as the days gradually lengthen towards summer's peak. With October further amplifying this trend to 13 hours of daylight, September serves as a promising gateway to brighter days ahead, inviting outdoor activities and a renewed appreciation for the beauty of New Zealand's spring.

Average Daylight Hours in Auckland for September

The chart illustrates the variation in daylight duration in Auckland throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 21m13h 26m12h 17m11h 6m10h 8m9h 39m9h 53m10h 44m11h 51m13h 1m14h 4m14h 37m
Data source: Auckland daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Auckland

As Auckland transitions into September, residents can expect a refreshing shift in the breeze. With an average wind speed of 5.6 m/s (13 mph), this month mirrors the tail end of winter, maintaining the elevated gusts seen in August. Interestingly, the winds have been gradually picking up since mid-year, starting from a modest 4.4 m/s (10 mph) in April to reach this peak in September. This consistent increase suggests that spring is ushering in a livelier atmosphere, setting the stage for the warmer months ahead. As temperatures rise, the invigorating winds serve as a delightful reminder of nature's cyclical rhythm, enhancing Auckland's vibrant coastal charm.

Average September Wind Speed in Auckland

The chart displays monthly wind speed patterns in Auckland, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.44.34.14.44.74.85.25.65.6 m/s5.53.85.1
Data source: Auckland September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Auckland Compares to Other Months

Weather in Auckland varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Auckland, focusing on differences in temperature, rainfall, humidity, and UV levels.

In September, the weather in Auckland features a cooler climate, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 20°C (68°F) and an average of 13°C (56°F). With 111 mm (4.4 in) of precipitation over about 14 days, the month is also quite wet and humid, maintaining a humidity level of 80%. In contrast, January presents a much warmer atmosphere, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (79°F), averaging 20°C (69°F). Notably, January sees significantly less rainfall, with only 56 mm (2.2 in) over about 7 days, and the humidity is slightly lower at 79%. For more detailed insights into Auckland's January weather, you can visit Auckland weather in January.

In September, the weather is typically cooler, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 20°C (68°F), averaging around 13°C (56°F). This month also sees considerable rainfall, totaling 111 mm (4.4 in) over about 14 days, coupled with a high humidity level of 80%. In contrast, February enjoys milder temperatures, with averages between 14°C (57°F) and 27°C (80°F), reaching an average of 21°C (70°F). Precipitation is less frequent at 78 mm (3.1 in) over 9 days, and humidity is slightly lower at 76%. For more details on the February climate, check out Auckland weather in February.

September and March present contrasting weather patterns in terms of temperature and precipitation. In September, the minimum temperature hovers around 6°C (43°F), with an average of 13°C (56°F) and a maximum reaching 20°C (68°F). This month also experiences significant rainfall, totaling 111 mm (4.4 in) over approximately 14 days, contributing to a high humidity of 80%. In contrast, March offers a milder climate, with minimum temperatures starting at a warmer 13°C (56°F) and an average of 20°C (68°F), peaking at 25°C (77°F). Precipitation in March is less intensive, totaling 87 mm (3.4 in) over 13 days and with a lower humidity level of 74%. For more detailed insights, you can check Auckland weather in March.

September and April showcase distinct weather patterns, with September experiencing cooler temperatures and higher humidity. In September, the minimum temperature dips to 6°C (43°F) with an average of 13°C (56°F) and a maximum of 20°C (68°F), accompanied by 111 mm (4.4 in) of precipitation over 14 days. In contrast, April brings milder conditions, featuring a minimum of 11°C (51°F), an average of 18°C (64°F), and a comfortable maximum of 24°C (75°F). Rainfall slightly decreases to 100 mm (3.9 in) over 11 days, alongside lower humidity of 74%. For more detailed information, you can explore Auckland weather in April.

September and May offer distinct weather experiences, though both months feature a similar humidity level of 80%. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 20°C (68°F), with an average temperature of 13°C (56°F). This month also sees more precipitation, with 111 mm (4.4 in) falling over 14 days. In contrast, May tends to be slightly warmer, with temperatures ranging from 7°C (45°F) to 21°C (70°F) and an average of 15°C (60°F). Rainfall is less frequent in May, totaling 84 mm (3.3 in) over 11 days. For more details on May weather conditions, visit Auckland weather in May.

In comparing the weather of September and June, we see that both months share similar average temperatures, hovering around 13°C (56°F). However, September tends to be slightly cooler, with a minimum temperature of 6°C (43°F) compared to June's 7°C (45°F). Precipitation levels are fairly close as well, with September receiving 111 mm (4.4 in) over 14 days, while June sees slightly less at 107 mm (4.2 in) over 12 days. Humidity levels are high in both months, with September at 80% and June slightly higher at 82%. For more detailed insights into June weather, you can check Auckland weather in June.

In comparing the weather of September to July, we see some notable differences. September typically has a slightly warmer temperature range, with minimums of 6°C and maximums reaching 20°C, while July sees a minimum of 5°C and a maximum of 18°C. The average temperatures are also marginally higher in September, at 13°C compared to July’s 12°C. Precipitation levels are fairly close, with September receiving 111 mm over 14 days and July experiencing 102 mm across 13 days. Humidity is slightly lower in September at 80% versus July's 83%, making September feel a bit more pleasant overall. For more detailed information, check out Auckland weather in July.

In comparing the weather between September and August, both months exhibit a similar temperate climate, with September having a slightly wider range of temperatures. September's minimum temperature is 6°C (43°F), while August's is marginally higher at 7°C (45°F). The average temperature remains fairly stable at 13°C (56°F) for both months, but September boasts a maximum temperature of 20°C (68°F), slightly warmer than August's 18°C (65°F). Precipitation levels are comparable, with September receiving 111 mm (4.4 in) over 14 days and August slightly surpassing that with 114 mm (4.5 in) over 15 days. Humidity levels are consistent in both months at 80%. For a closer look at the August weather patterns, you can check Auckland weather in August.

September and October show a gradual warming trend in temperature, with October experiencing slightly higher averages. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 20°C (68°F), while October sees minimum temperatures rise to 8°C (47°F) and maximums reaching 21°C (71°F). Precipitation is more substantial in September, totaling 111 mm (4.4 in) across 14 days, compared to 81 mm (3.2 in) in October, which also has the same number of rainy days. Both months maintain a consistent humidity level of 80%. For more details on October's weather, you can visit Auckland weather in October.

September and November weather exhibit some notable differences. September typically sees a minimum temperature of 6°C (43°F) and an average of 13°C (56°F), with a maximum reaching 20°C (68°F). It also experiences relatively high precipitation, averaging 111 mm (4.4 in) over about 14 days, while humidity sits at 80%. In contrast, November enjoys warmer temperatures, with a minimum of 11°C (53°F), an average of 17°C (63°F), and a maximum of 23°C (73°F). Precipitation drops to 80 mm (3.2 in) over approximately 12 days, maintaining the same humidity level of 80%. For more details, you can explore Auckland weather in November.

In September, the weather is notably cooler, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 20°C (68°F) and an average of 13°C (56°F). During this month, rainfall is fairly frequent, with a total precipitation of 111 mm (4.4 in) spread over 14 days, and humidity remains relatively high at 80%. In contrast, December brings warmer temperatures, with minimums of 12°C (54°F) and maximums reaching 25°C (77°F), averaging 19°C (67°F). The month is also drier, with 72 mm (2.8 in) of precipitation over 12 days, and only slightly lower humidity at 78%. For more details, check out the Auckland weather in December.

Compare Auckland's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Auckland

As September arrives in Auckland, the weather begins to shift, welcoming the spring season with a mix of mild temperatures and increased rainfall. This month stands out with a moderate average temperature that contrasts with the cooler winter months, yet still remains a bit brisk compared to the warmer summer ahead. With 80% humidity and frequent rain showers across nearly half the month, this period is characterized by a refreshing, vibrant atmosphere as nature awakens. Unlike the drier, warmer summer days, September's climate may necessitate a light jacket and an umbrella for those adventurous enough to explore the city. For a deeper understanding of Auckland’s weather patterns, visit Auckland Climate.