Last updated: August 31, 2025
September in Porirua, New Zealand ushers in a crisp transition from winter, characterized by a maximum temperature of 15°C (59°F) and an average of 11°C (52°F). With a minimum temperature dipping to 7°C (44°F), residents experience fresh, invigorating days. However, the month is also marked by 85 mm (3.4 in) of precipitation spread over 12 days, contributing to the city’s lush landscapes. Humidity levels peak at a notable 83%, adding to the cool, damp atmosphere typical of early spring. This month embodies the essence of transition, blending the remnants of winter with the promise of warmer days ahead.
In September, Porirua, New Zealand, transitions from the chill of winter into the fresh beginnings of spring, marked by temperatures averaging 11°C (52°F). The month starts off with minimums around 7°C (44°F), gradually nudging up to daytime highs of 15°C (59°F), creating a cool but invigorating atmosphere. As the days grow longer, you’ll notice a slight warmth returning compared to the preceding months of August, which recorded even lower averages and maximums. This shift not only rejuvenates the landscape but also beckons residents and visitors alike to embrace the outdoors as vibrant buds and blossoms herald in the season of renewal.
September in Porirua, New Zealand brings a refreshing touch of spring, marked by an average precipitation of 85 mm (3.4 in) over 12 days. This follows a trend of relatively consistent rainfall throughout the winter months, with July peaking at 108 mm (4.3 in), and gradually tapering off as the seasons transition. Compared to the previous month, August, which saw 89 mm, September maintains a similar level of moisture, hinting at the lingering influence of winter weather systems. As nature awakens, this month's precipitation supports the blossoming flora, providing essential hydration without overwhelming the landscape, setting the stage for the warmer days ahead.
In September, Porirua experiences a consistent humidity level of 83%, reflecting a slight dip that follows the peak levels observed in winter. The data reveals a gradual increase in humidity from the warmer summer months, where January to March remain at a stable 79%, before a steady climb through autumn into the cooler months. As the seasons transition, humidity increases to 84% in May, peaking at 86% during the coldest months of June and July. By September, the humidity begins to stabilize, hinting at a warm, moist spring ahead, as it trends down slightly towards 82% in October. This cyclical pattern illustrates Porirua's maritime climate, where humidity tends to rise in the cooler months and gradually ease as warmer temperatures return.
As September unfolds in Porirua, New Zealand, residents can expect a UV Index of 6, placing it squarely in the high exposure category, with a burn time of 25 minutes. This marks a notable shift from the lower UV levels of the winter months, reflecting the gradual transition towards summer. Compared to August's moderate index of 4, early spring brings a heightened need for sun protection as the sun's intensity increases. Observing these patterns emphasizes the importance of staying informed about UV exposure as it rises, especially with the coming months set to present even greater risks; October will escalate to a very high index of 9. To learn more about seasonal UV patterns and stay safe in the sun, check out Porirua UV Index.
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In September, Porirua begins to shake off the winter chill, basking in a refreshing 250 hours of sunshine. This marks a slight increase from the preceding months, showcasing the gradual transition into spring. As the days grow longer and brighter, glimpses of warmer weather become more prevalent, hinting at the promise of summer ahead. The sunshine hours in September set the stage for an upward trend, as the brighter months of October and November loom, each boasting greater daylight and an abundance of outdoor activities. With the sun re-emerging, Porirua invites residents and visitors alike to revel in the blossoming beauty of the season.
In Porirua, New Zealand, September marks a transition into spring, bringing a 47% chance of sunny weather. While this likelihood is slightly above the dreariness of winter months like June, which sees only a 34% chance, it notably dips compared to the more generous sunshine of January with 61%. Following the gloomy grip of winter, September offers a hint of optimism, though it lags behind the sunny extravagance of early summer. As the month progresses, residents and visitors alike can look forward to a gradual increase in sunny days, making it a refreshing time for outdoor activities as the sun begins to stake its claim back in the skies.
As September unfolds in Porirua, New Zealand, residents experience a welcome increase in daylight lasting approximately 11 hours. This marks a shift from the shorter days of winter, beginning with a gradual rise that peaks in the summer months. Following the 10 hours of daylight in August, September signals a transition towards brighter days ahead, leading into October's 13 hours and culminating in the summer solstice with 15 hours of daylight in December. This rhythmic pattern showcases the region's seasonal evolution, emphasizing the interplay between diminishing winter light and the anticipation of longer, sun-filled days that enliven the landscape and daily life.
As September arrives in Porirua, New Zealand, the winds pick up pace, reaching an average speed of 8.9 m/s (20 mph)—a noticeable increase from the preceding months. This marks it as the windiest month of the year, following the trend established in late winter when August also saw a surge, averaging 8.1 m/s (18 mph). The transition from the cooler winter months to the invigorating spring breezes creates a vibrant atmosphere, as the winds swiftly dance through the region, signaling the approach of warmer weather. Notably, the wind speeds in September reflect the start of more dynamic weather patterns, setting a brisk tone for the months ahead while maintaining the region's reputation for its gusty nature.
Weather in Porirua varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Porirua, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather tends to be cooler, with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 15°C (59°F), accompanied by higher precipitation levels of 85 mm (3.4 in) over 12 days. This month also boasts relatively high humidity at 83%. On the other hand, January experiences a milder climate, with temperatures starting at a minimum of 11°C (52°F) and reaching a comfortable maximum of 23°C (73°F). Rainfall is significantly lower in January, totaling only 33 mm (1.3 in) across just 6 days, and humidity is slightly reduced at 79%. For a closer look at January's weather in Porirua, you can check Porirua weather in January.
In comparing the weather between September and February, September presents a cooler picture with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 15°C (59°F) and an average of 11°C (52°F). This month also experiences higher rainfall, with 85 mm (3.4 in) of precipitation spread over 12 days, alongside a relatively high humidity of 83%. In contrast, February is warmer, with temperatures swinging from a minimum of 12°C (54°F) to a comfortable maximum of 22°C (72°F), averaging 17°C (63°F). Precipitation decreases to 69 mm (2.7 in) over just 6 days, and humidity levels drop slightly to 79%. For more detailed information, check out Porirua weather in February.
September and March present distinct weather patterns, marked by differences in temperature and humidity. September sees cooler temperatures, with averages around 11°C (52°F) and highs only reaching 15°C (59°F), while March offers a more temperate climate with average temperatures of 16°C (61°F) and maximums hitting 20°C (69°F). In terms of precipitation, September experiences slightly more rainfall at 85 mm (3.4 in) over 12 days, compared to March's 76 mm (3.0 in) over just 9 days. Additionally, September has a higher humidity level at 83%, while March is more comfortable at 79%. For those curious about the specifics of March weather, you can explore the details here: Porirua weather in March.
When comparing September and April weather, there are notable differences in temperature and precipitation. September generally has cooler temperatures, with minimums dipping to around 7°C (44°F) and a maximum of 15°C (59°F), while April sees a rise in temperatures, ranging from a minimum of 9°C (48°F) to a maximum of 19°C (67°F). In terms of precipitation, April is slightly wetter with a total of 104 mm (4.1 in) over 10 days compared to September's 85 mm (3.4 in) across 12 days. Humidity levels are relatively similar, with September at 83% and April at 80%. For more detailed insights, you can check out Porirua weather in April.
September and May exhibit relatively mild temperatures, with September having an average of 11°C (52°F) compared to May's average of 13°C (56°F). The maximum temperatures also differ slightly, reaching 15°C (59°F) in September and 17°C (64°F) in May. Precipitation levels are quite similar, with September experiencing 85 mm (3.4 in) over 12 days and May seeing slightly more at 88 mm (3.5 in) over 11 days. Humidity remains high in both months, with September at 83% and May slightly higher at 84%. For a more detailed look at May weather, visit Porirua weather in May.
In September, temperatures are slightly cooler, with an average of 11°C (52°F) compared to June's 12°C (53°F). Both months experience similar minimum temperatures of around 7°C, but September's maximum temperature is slightly lower at 15°C (59°F) than June’s 16°C (61°F). Precipitation is also noteworthy; September records 85 mm (3.4 in) over 12 days, while June sees a bit more at 101 mm (4.0 in) over the same number of days. Humidity levels are comparable, with September at 83% and June at 86%. For more detailed weather insights, check Porirua weather in June.
In comparing the weather of September and July, both months exhibit similar temperature patterns, with minimums around 7°C (44°F), average highs of 15°C (59°F), and averages hovering at 11°C (52°F). However, July experiences slightly higher precipitation with 108 mm (4.3 in) over 13 days compared to September's 85 mm (3.4 in) over 12 days. Humidity levels are also quite close, with July at 86% and September at 83%. For a more detailed perspective on July weather, you can refer to Porirua weather in July.
In comparing the weather between September and August, we see that both months have similar average temperatures, with September registering a minimum of 7°C (44°F) and a maximum of 15°C (59°F), while August has a slightly lower range, with a minimum of 6°C (43°F) and a maximum of 14°C (57°F). Precipitation levels are also quite comparable, with September experiencing 85 mm (3.4 in) over 12 days and August slightly higher at 89 mm (3.5 in) on the same number of days. Both months maintain a consistent humidity level of 83%, contributing to a generally damp atmosphere. For more detailed information on August weather, you can check Porirua weather in August.
September and October exhibit a gradual transition in weather, with October offering slightly milder temperatures and reduced precipitation. In September, temperatures range from a minimum of 7°C to a maximum of 15°C, while October sees a minor drop in the minimum to 6°C and a slight increase in the average to 12°C. Precipitation also decreases from 85 mm over 12 days in September to 72 mm over 11 days in October, contributing to a drier month. Humidity remains relatively stable, slightly decreasing from 83% in September to 82% in October. For more details on October weather, you can refer to Porirua weather in October.
In September, temperatures begin to cool down, with minimums around 7°C (44°F) and maximums reaching 15°C (59°F), while the average temperature hovers at 11°C (52°F). The month typically experiences about 85 mm (3.4 in) of precipitation over 12 days, contributing to a high humidity level of 83%.
By November, the weather shows a slight warming trend, as minimum temperatures increase to 9°C (49°F) and maximums peak at 18°C (64°F), resulting in an average temperature of 14°C (57°F). Precipitation decreases to 73 mm (2.9 in) across 10 days, and humidity remains relatively stable at 82%. For more detailed information on November weather conditions, you can check Porirua weather in November.
In September, temperatures typically range from a minimum of 7°C (44°F) to a maximum of 15°C (59°F), with an average temperature of 11°C (52°F). The month experiences about 85 mm (3.4 in) of precipitation over 12 days, alongside relatively high humidity at 83%. In contrast, December sees milder conditions, with minimum temperatures around 10°C (51°F) and maximums reaching 20°C (68°F), resulting in an average of 16°C (61°F). Precipitation for December is slightly higher at 101 mm (4.0 in) across 11 days, but humidity drops marginally to 81%. For more detailed insights into December weather, you can visit Porirua weather in December.
As September unfolds in Porirua, the transition from winter to spring brings a noticeable shift in weather patterns. This month tends to be cooler than the warmer months ahead, with temperatures averaging around 11°C and frequent rain, accumulating about 85 mm over 12 days. The increased humidity at 83% adds a brisk chill to the air, contrasting with the milder and drier conditions expected in later months. Overall, September's unpredictable weather serves as a reminder that spring is just on the horizon. For more detailed insights on Porirua's seasonal variations, check out Porirua Climate.