September Weather in Otaki, New Zealand

Last updated: August 31, 2025

In September, Otaki, New Zealand experiences a transition into spring, with average temperatures hovering around 10°C (50°F). The maximum temperature can reach a mild 16°C (61°F), while chilly nights dip to a minimum of 2°C (35°F). Rainfall is quite significant this month, with 175 mm (6.9 in) recorded over 18 days, contributing to a high humidity level of 80%. This combination of mild temperatures and frequent precipitation makes September a refreshing, albeit damp, time in Otaki, perfect for appreciating the beauty of nature awakening from winter's slumber.

September Temperature in Otaki

In September, Otaki, New Zealand, begins to shake off the winter chill as temperatures gradually rise. The month sees a minimum of 2°C (35°F), hinting at the last remnants of cold, while the average climbs to a crisp 10°C (50°F). As the days progress, the maximum temperature peaks at a mild 16°C (61°F), signaling the onset of spring. This transitional period reflects a noticeable trend: following the coldest winter months, September starts paving the way for warmer days, with temperatures steadily increasing as the season progresses. The shift towards milder weather not only rejuvenates the landscape but also beckons outdoor enthusiasts to embrace the beauty of Otaki in full bloom.

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

The chart illustrates September temperature patterns in Otaki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otaki, 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).
JanFebMarAprMayJunJulAugSepOctNovDec626259555249474849525660
Data source: Temperature data for Otaki 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 Otaki

In September, Otaki experiences a notable increase in rainfall, with 175 mm (6.9 inches) of precipitation recorded over 18 days. This trend reflects a significant rise compared to the preceding months, as the winter's grip begins to loosen and spring approaches. Notably, September marks a peak in both precipitation volume and frequency of rainy days, indicating a transition into a wetter season ahead. As the countryside bursts into bloom, the generous rainfall not only nurtures the landscape but also signals the onset of a vibrant spring, setting the scene for warmer and sunnier days to come.

September Precipitation Trends in Otaki

The chart displays monthly precipitation patterns in Otaki, 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 Otaki, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec98109107157129131169164175141142194
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Otaki

In September, Otaki experiences a humidity level of 80%, marking a noticeable decline from the peak levels observed in the mid-winter months of June and July, both at 83%. This slight drop indicates a transition towards the more balanced and moderate humidity levels seen in the earlier months of the year. Following a pattern, humidity tends to be highest during the late autumn and winter, while spring invites a refreshing decrease, suggesting that Otaki’s September offers a more comfortable climate as it paves the way for warmer months ahead. With October’s expected humidity slightly lower at 79%, residents and visitors alike can anticipate a pleasant atmosphere as the seasonal changes unfold.

September Average Humidity in Otaki

This chart illustrates the average monthly humidity levels in Otaki, 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 Otaki is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%76%77%82%83%84%81%80%79%78%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Otaki

As autumn begins to set in, September in Otaki, New Zealand, sees a UV Index of 6, categorizing exposure as high with a burn time of 25 minutes. This marks a slight increase from the winter months, where the index dipped to a low of 2, allowing for more extended safe sun exposure. As spring approaches, the UV levels gradually rise, hinting at the imminent return of stronger sun rays. It’s a reminder for residents and visitors alike to stay vigilant, adopting sun-safe practices, especially as warmer days are on the horizon. For more insights into sun protection, visit Otaki UV Index.

Maximum UV Index Levels in Otaki for September

The chart shows the monthly maximum UV Index (UVI) for Otaki 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 Otaki typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1313974224691013
Data source: Otaki 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 Otaki

September in Otaki, New Zealand, marks a delightful transition as the days gradually lengthen with 237 hours of sunshine. This month signifies a resurgence in sunlight, following the cooler winter months that saw a significant drop, with June basking in just 156 hours. As spring begins to unfold, September experiences a refreshing boost compared to the previous months, hinting at the warmer days ahead. While not yet reaching the peak averages of the summer months, September sets a promising tone for the months to come, particularly with October lighting up with 267 hours. As Otaki steps into spring, the increasing daylight beckons residents and visitors alike to revel in the beauty of the region's blooming landscapes.

Monthly Sunshine Duration in Otaki: September Highlighted

The September sunshine duration represents the total number of hours Otaki 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.
JanFebMarAprMayJunJulAugSepOctNovDec268h278h260h225h196h156h184h214h237h267h294h315h
Data source: Otaki September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Otaki During September

In September, Otaki experiences a 36% chance of sunny weather, positioning it as a transitional month as winter wanes and spring approaches. While this likelihood is modest, it is slightly higher than the gloomy winter months of June and July, which hover around 22% and 39% respectively. As the year progresses, the chances of sunshine gradually increase, peaking in the summer months of January and February with probabilities of 43% and 47%. Thus, September serves as a promising hint of the brighter days to come, inviting visitors to enjoy the refreshing arrival of spring despite the lingering clouds.

Percentage of Sunny Days in September in Otaki

The chart illustrates the percentage of sunny days in Otaki 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 Otaki experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%47%43%42%35%22%39%37%36%19%32%26%
Data source: Otaki September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Otaki in September

As the seasons shift in Otaki, New Zealand, September marks a pivotal transition in daylight duration, offering around 11 hours of light each day. This increase from the 10 hours in August heralds the arrival of spring, as days gradually lengthen. Following the winter months, when daylight lingered around 9 hours, September brings a refreshing boost, leading toward the longer, sun-soaked days of October and November, which showcase 13 and 14 hours of daylight, respectively. This gradual ascent in daylight is not just a sign of season change; it invites opportunities for outdoor activities and rejuvenates the spirit, as nature begins to blossom once more.

Average Daylight Hours in Otaki for September

The chart illustrates the variation in daylight duration in Otaki throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 41m13h 38m12h 19m10h 58m9h 51m9h 17m9h 34m10h 32m11h 49m13h 9m14h 22m15h
Data source: Otaki daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Otaki

As September approaches in Otaki, New Zealand, the landscape begins to feel the invigorating shift of the season with an average wind speed of 5.3 m/s (12 mph). This gentle yet noticeable increase from previous months heralds the transition from winter to spring, making the coastal town vibrant and refreshing. Following the calm of winter, where winds lingered around 3.9 to 4.5 m/s, September's breezy demeanor not only breathes new life into the environment but also sets the tone for the following months, maintaining a steady pace of around 4.0 m/s in October. The uptick in wind speed captures that sense of rebirth, inviting residents and visitors alike to embrace the outdoors, with the rhythmic dance of leaves and grasses becoming a hallmark of vivid spring energy in Otaki.

Average September Wind Speed in Otaki

The chart displays monthly wind speed patterns in Otaki, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.43.13.53.84.24.13.94.55.3 m/s4.04.64.3
Data source: Otaki September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Otaki Compares to Other Months

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

September and January show distinctly different weather patterns. In September, temperatures range from a chilly 2°C (35°F) at night to a mild average of 10°C (50°F) during the day, peaking at 16°C (61°F). This month experiences significant rainfall, with 175 mm (6.9 in) spread over 18 days, accompanied by high humidity at 80%. In contrast, January features much warmer temperatures, starting at a minimum of 7°C (45°F), averaging 16°C (62°F), and reaching a comfortable maximum of 26°C (79°F). Rainfall is also less frequent, with 98 mm (3.9 in) over just 13 days, and humidity is slightly lower at 75%. For those interested in specific January conditions, you can find more details here: Otaki weather in January.

In comparing the weather between September and February, notable differences emerge. September is cooler, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 16°C (61°F) and an average of 10°C (50°F). The month is also characterized by higher precipitation, with approximately 175 mm (6.9 in) falling over 18 days, along with humidity levels peaking at 80%. In contrast, February offers significantly warmer conditions, boasting a minimum temperature of 6°C (44°F) and reaching highs of 25°C (78°F), resulting in an average of 17°C (62°F). This month experiences less rainfall, with 109 mm (4.3 in) over just 11 days, and slightly lower humidity at 76%. For more details on February weather specifics, you can check Otaki weather in February.

In comparing the weather between September and March, there are notable differences in temperature and precipitation. September experiences cooler temperatures, ranging from a minimum of 2°C (35°F) to a maximum of 16°C (61°F), with an average of 10°C (50°F). It is also quite wet, with 175 mm (6.9 in) of precipitation spread over 18 days and high humidity at 80%. In contrast, March sees warmer temperatures, with a minimum of 6°C (44°F) and a maximum of 23°C (73°F), averaging 15°C (60°F). Precipitation in March is lower at 107 mm (4.2 in) and occurs on fewer days (13), along with slightly lower humidity at 75%. For more information on weather conditions specific to March, check out Otaki weather in March.

In comparing September and April weather, September tends to be cooler with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 16°C (61°F), while April enjoys milder conditions, with temperatures varying from a minimum of 5°C (40°F) to a maximum of 21°C (71°F). Despite September's slightly higher precipitation at 175 mm (6.9 in) over 18 days, April is not far behind with 157 mm (6.2 in) across 15 days, indicating that both months experience considerable rainfall. Additionally, September has a higher humidity level of 80%, compared to April's 77%, making April feel slightly more comfortable. For more specific details about Otaki's April weather, you can check Otaki weather in April.

In September, the weather is generally cool, with average temperatures ranging from a chilly 2°C (35°F) at night to a maximum of 16°C (61°F) during the day. With 175 mm (6.9 in) of precipitation over 18 days, it’s one of the wetter months, and humidity levels hover around 80%. In contrast, May sees slightly warmer temperatures, with averages between 2°C (35°F) and 18°C (64°F), and a bit less rain at 129 mm (5.1 in) over 13 days. The humidity is also a touch higher at 82%, making May feel a bit more humid overall. For more detailed weather insights, you can check Otaki weather in May.

When comparing the weather in September and June, both months feature similar high temperatures, reaching up to 16°C (61°F). However, September tends to be slightly warmer on average, with temperatures around 10°C (50°F), compared to June's average of 9°C (49°F). Precipitation levels are also higher in September, with 175 mm (6.9 in) of rain over 18 days, contrasted with June's 131 mm (5.2 in) over 13 days. Humidity remains relatively constant, with September at 80% and June slightly higher at 83%. For more detailed information on June weather, you can check Otaki weather in June.

September weather generally feels milder compared to July, with average temperatures rising from 8°C (47°F) in July to 10°C (50°F) in September. While both months experience significant rainfall, September sees slightly more precipitation at 175 mm (6.9 in) over 18 days, compared to July's 169 mm (6.6 in) over 16 days. Humidity levels are also comparable, with September at 80% and July at 83%. For a detailed look at July conditions, you can check Otaki weather in July.

In comparing the weather between September and August, we can see a slight increase in temperatures. September features minimum temperatures of 2°C (35°F) and averages around 10°C (50°F), while August has a minimum of 0°C (33°F) and an average of 9°C (48°F). The maximum temperature in September reaches 16°C (61°F), surpassing August's maximum of 15°C (59°F). Precipitation levels are also comparable, with September receiving 175 mm (6.9 in) over 18 days, slightly more than August's 164 mm (6.5 in) across 17 days. Humidity remains fairly consistent, hovering around 80% in September and 81% in August. For more specific data on August weather, you can check Otaki weather in August.

In September, the weather tends to be cooler, with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 16°C (61°F). This month experiences significant rainfall, totaling 175 mm (6.9 in) over 18 days, accompanied by high humidity at 80%. Contrastingly, October sees slightly milder conditions, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 18°C (65°F). Precipitation decreases to 141 mm (5.5 in) over 19 days, and humidity remains fairly consistent at 79%. For more insights, check out the detailed weather information here: Otaki weather in October.

September and November present distinct weather patterns, with September generally cooler and wetter than November. In September, temperatures range from a chilly minimum of 2°C (35°F) to a maximum of 16°C (61°F), while November sees a milder temperature range from 6°C (42°F) to 21°C (70°F). Precipitation in September is more pronounced, totaling 175 mm (6.9 in) across 18 days, compared to November's 142 mm (5.6 in) over 15 days. Humidity levels remain relatively high in both months, with September averaging 80% and November slightly lower at 78%. For more detailed information about November weather in Otaki, you can visit Otaki weather in November.

In September, the weather tends to be cooler with average temperatures around 10°C (50°F) and a maximum of 16°C (61°F), while December experiences milder conditions with averages at 15°C (60°F) and peaks reaching 23°C (74°F). September is marked by significant precipitation of 175 mm (6.9 in) over 18 days and higher humidity at 80%, whereas December sees slightly more rain, totaling 194 mm (7.6 in) over 17 days, but lower humidity at 75%. This transition reflects the shift from the fresh spring air of September to the warmer, more humid conditions typical of December. For a more detailed look at the December weather, you can visit Otaki weather in December.

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Conclusion: What to Expect From September Weather in Otaki

As September unfolds in Otaki, the weather transitions into a notable variance from the colder winter months. Daytime temperatures begin to rise, averaging around 10°C, while maximums occasionally reach 16°C, offering a hint of warmth that beckons the arrival of spring. However, the days are still marked by frequent rainfall, with nearly half the month experiencing precipitation, contributing to a humidity level of 80%. This combination of cooler nights, coupled with relatively high moisture, creates a unique and somewhat contrasting climate compared to sunnier summer months. For a deeper insight into Otaki's weather patterns, check out Otaki Climate.