Last updated: August 31, 2025
New Plymouth in September experiences a gentle transition into spring, characterized by a maximum temperature of 16°C (62°F) and an average of 12°C (54°F), while minimally dipping to 7°C (45°F) at night. This month sees an average precipitation amount of 173 mm (6.8 in), with rain falling on approximately 17 days, creating a lush, green landscape. The humidity levels hover around 80%, contributing to the city's vibrant atmosphere and often crisp mornings. As the days gradually lengthen, residents and visitors alike can enjoy the refreshing conditions that herald the change of seasons.
In September, New Plymouth begins to shake off the chill of winter, as temperatures gradually rise. With minimums averaging around 7°C (45°F) and maximums peaking at 16°C (62°F), this month is characterized by a gentle transition towards warmer weather. The average temperature hovers at 12°C (54°F), reflecting the onset of spring, where longer days and blossoming flora herald a refreshing change. As the region sheds its colder grasp, September provides a delightful invitation to explore outdoor activities while still being wrapped in a cozy layer. This month marks the key shift toward the more vibrant warmth of spring, setting the stage for the upcoming months of milder and sunnier weather.
In September, New Plymouth experiences a notable shift in precipitation, with 173 mm (6.8 in) of rain spread over 17 days. This marks a decrease from the wettest months of winter, July and August, yet remains significant for early spring. The trend indicates that while September brings milder conditions compared to the peak winter months, it still maintains a healthy level of rainfall, contributing to the lush greenery the region is known for. As the days gradually become longer and warmer, the combination of consistent precipitation and improved weather sets the stage for the vibrant blooms of spring to flourish.
In September, New Plymouth experiences a moderate humidity level of 80%, showing a slight decline from the summer months of January through March, where humidity peaks at 79% in January and gradually decreases to 75% by March. This month marks a transition towards the wetter months, as the humidity begins to rise again in October, hitting 82%. The trend reflects the shifting seasons, with spring ushering in slightly drier conditions, yet still holding onto a comfortable level of moisture. Overall, September serves as a bridge, easing into the more humid and lush months ahead while maintaining a pleasant balance.
As September rolls in New Plymouth, the UV Index begins its transition into the warmer months. With a UV Index of 6, categorized as high, residents and visitors alike should be mindful of sun exposure, as the approximate burn time drops to 25 minutes. This marks a noticeable increase from the cooler winter months, where the Index hovered at levels of 3 and 4. Notably, this upward trend indicates that as spring approaches, the intensity of UV radiation rises, urging everyone to take precautions while enjoying the outdoors. To stay informed on your sun safety, check out the New Plymouth UV Index for the latest updates.
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As we transition into spring, September in New Plymouth, New Zealand, shines brightly with 251 hours of sunshine, marking a noticeable uplift from the winter months. This month showcases a significant rebound in daylight as the region shakes off the cooler temperatures of June and July, which recorded only 180 and 195 hours respectively. With September's hours trending upwards, it hints at the upcoming glorious summers, setting the stage for even longer days ahead. Interestingly, while September enjoys a healthy amount of sunshine, it remains a precursor to the peak sunshine months of November and December, when New Plymouth basks in 310 and 338 hours respectively. The pattern of increasing sunshine hours not only brings warmth but also revitalizes the vibrant landscape, inviting residents and visitors alike to embrace outdoor adventures and scenic explorations.
In New Plymouth, the likelihood of sunny weather in September stands at 44%, a refreshing uptick compared to the drearier winter months. As the seasons shift, September offers a glimpse of brighter days ahead, aligning closely with the sunnier transitions of March and November. This rejuvenation is particularly welcome after the low of 37% seen in both July and August. Despite October taking a dip down to 28%, September’s sun-filled promise creates an inviting atmosphere, hinting at the arrival of spring and setting the stage for more consistent sunshine in the months to come.
As September arrives in New Plymouth, daylight begins to reclaim its presence after the winter months, offering about 11 hours of sunlight each day. This transitional period signals a return to longer days, setting the stage for the warmer months ahead. Following a consistent decline from January's peak of 14 hours, daylight hours dipped to a low of 9 hours during the middle of winter, accentuating the stark contrast as spring approaches. With October promising even more light at 13 hours, the gradual increase highlights New Plymouth's shift towards vibrant outdoor activities and blooming landscapes, inviting both locals and visitors to bask in the rejuvenating warmth of the sun.
As September arrives in New Plymouth, New Zealand, the winds begin to stir with an invigorating energy, averaging 6.9 m/s (15 mph)—the highest speed recorded this year. This seasonal uptick follows a steady increase from the cooler months of June and July, where winds hovered around 5.8 m/s (13 mph) and 6.6 m/s (15 mph), respectively. As spring unfolds, the winds signal a transition, maintaining a brisk pace that charms outdoor enthusiasts and nature lovers alike. With October on the horizon and forecasts suggesting a dip back to 5.4 m/s (12 mph), September serves as a vibrant reminder of the invigorating spirit of the season, capturing the delicate balance between change and stability in New Plymouth’s coastal climate.
Weather in New Plymouth varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New Plymouth, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures in New Plymouth range from a chilly 7°C (45°F) at night to a mild 16°C (62°F) during the day, with an average of 12°C (54°F). The month is characterized by higher precipitation, totaling 173 mm (6.8 in) over approximately 17 days, contributing to an 80% humidity level. In contrast, January experiences significantly warmer weather, with minimum temperatures of 12°C (53°F) rising to 24°C (75°F) at their peak, and an average temperature of 18°C (65°F). Precipitation is also lower in January, with only 94 mm (3.7 in) recorded over about 9 days, and humidity remains relatively stable at 79%. For more details on January weather, you can visit New Plymouth weather in January.
September and February offer distinctly different weather patterns. In September, temperatures range from a chilly minimum of 7°C (45°F) to a mild maximum of 16°C (62°F), with an average temperature of 12°C (54°F). The month sees considerable rainfall, averaging 173 mm (6.8 in) over 17 rainy days, and humidity levels are relatively high at 80%. In contrast, February experiences much warmer temperatures, with a minimum of 13°C (55°F) and a maximum reaching 24°C (75°F), resulting in a pleasant average of 19°C (66°F). February's rainfall is less significant, totaling around 95 mm (3.7 in) over just 10 days, accompanied by slightly lower humidity at 77%. For more details, you can check New Plymouth weather in February.
September and March present contrasting weather patterns, reflecting the transition from late winter to early spring and early spring to late summer, respectively. In September, temperatures are cooler with a minimum of 7°C (45°F) and an average of 12°C (54°F), while March enjoys milder weather, with minimum temperatures starting at 13°C (55°F) and averaging 18°C (64°F). Precipitation is slightly higher in September, accumulating 173 mm (6.8 in) over 17 days compared to 160 mm (6.3 in) over 12 days in March. Additionally, the humidity in September is notably higher at 80%, compared to 75% in March, contributing to the chillier atmosphere of early spring. For more details, visit New Plymouth weather in March.
When comparing the weather in September and April, notable differences emerge. September tends to be cooler, with average temperatures around 12°C (54°F) and maximums reaching 16°C (62°F), while April boasts a milder average of 16°C (61°F) and can peak at 21°C (70°F). In terms of precipitation, April receives slightly more rain at 207 mm (8.1 in) over 14 days, compared to September's 173 mm (6.8 in) across 17 days. Humidity is also a factor, with September recorded at 80% and April slightly lower at 76%. For more detailed insights, you can check New Plymouth weather in April.
When comparing the weather in September to that of May, we notice a gradual warming trend. September tends to be cooler, with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 16°C (62°F), while May features slightly warmer averages, with minimums of 9°C (48°F) and maximums of 19°C (66°F). Precipitation is notable in both months, with September receiving 173 mm (6.8 in) over 17 days and May having slightly more at 195 mm (7.7 in) across 14 days. Humidity levels remain relatively consistent, with September at 80% and May at 81%. For a detailed look at what to expect in May, check out New Plymouth weather in May.
When comparing the weather in September and June, September tends to be slightly cooler, with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 16°C (62°F), while June has temperatures from a minimum of 8°C (46°F) to a maximum of 17°C (63°F). Precipitation is more pronounced in September, with an average of 173 mm (6.8 in) spread over 17 days, compared to June's 155 mm (6.1 in) over 14 days. Additionally, humidity levels are high in both months, with September at 80% and June slightly higher at 83%. For more details about June weather, you can check New Plymouth weather in June.
When comparing the weather in September and July, we see some notable similarities and differences. Both months have an average temperature of around 12°C (54°F) with minimums of 7°C (45°F), but July tends to be slightly cooler with a maximum of 16°C (60°F) compared to September's 16°C (62°F). Rainfall is more prominent in July, with 224 mm (8.8 in) over 18 days, while September sees a reduction in precipitation to 173 mm (6.8 in) across 17 days. Humidity levels are also quite similar, with July at 84% and September at 80%. For more detailed information about July weather, you can visit this link: New Plymouth weather in July.
In comparing the weather between September and August, both months exhibit similar average temperatures, with September showing slightly higher maximum temperatures at 16°C (62°F) compared to August’s 15°C (59°F). However, August experiences more precipitation, totaling 214 mm (8.4 in) over 19 days, while September sees 173 mm (6.8 in) across 17 days, suggesting a slightly drier month. Additionally, humidity remains high in both months, but is marginally lower in September at 80% compared to August’s 81%. For more details on August weather specifically, you can check New Plymouth weather in August.
September and October present a subtle shift in weather patterns, with October slightly milder than September. In September, temperatures range from a minimum of 7°C (45°F) to a maximum of 16°C (62°F), with an average of 12°C (54°F). There's a notable amount of rainfall, totaling 173 mm (6.8 in) over 17 days, alongside a humidity level of 80%. Conversely, October sees a small increase in temperatures, with a minimum of 8°C (46°F) and a maximum of 17°C (62°F), averaging 13°C (56°F). Precipitation decreases to 141 mm (5.6 in) over 16 days, but humidity rises slightly to 82%. For more detailed information, you can visit New Plymouth weather in October.
In September, the temperatures in New Plymouth range from a minimum of 7°C (45°F) to a maximum of 16°C (62°F), with an average of 12°C (54°F). The month experiences significant rainfall, totaling 173 mm (6.8 in) across 17 days, and humidity levels are relatively high at 80%.
By November, the weather warms slightly, with lows of 10°C (51°F) and highs reaching 20°C (68°F), averaging 15°C (59°F). Precipitation decreases to 139 mm (5.5 in) over 13 days, and humidity increases marginally to 82%. This transition marks a shift toward milder and more pleasant weather as the year progresses. For further details, you can check New Plymouth weather in November.
In comparing the weather between September and December, September tends to be cooler with average temperatures around 12°C (54°F), whereas December experiences warmer conditions, averaging 17°C (63°F). Both months have similar humidity levels at 80%, but September is marked by heavier rainfall, totaling 173 mm (6.8 in) over 17 days, compared to December, which sees 180 mm (7.1 in) of precipitation across just 14 days. For more detailed information, you can check out the New Plymouth weather in December.
As September unfolds in New Plymouth, the weather presents a notable shift from the drier months of winter, with increased rainfall and higher humidity levels. This month marks the transition into spring, bringing an average temperature that begins to warm up but still features chilly evenings. With 173 mm of precipitation over 17 days, expect a mix of both clearer skies and rainy spells, making it a time of renewal for the region. While the temperature hovers around a cool 12°C, the vibrant blooms and lush landscapes begin to emerge, setting the stage for the warmer months ahead. For a more detailed look at how weather patterns evolve throughout the year, check out New Plymouth Climate.