Last updated: August 31, 2025
September in Arthur's Pass, New Zealand offers a striking transition into spring, where temperatures typically range from a maximum of 13°C (56°F) to a minimum of -8°C (18°F). The average temperature settles around 4°C (40°F), creating a crisp yet invigorating atmosphere. This month is characterized by substantial precipitation, with an impressive 270 mm (10.6 in) recorded over approximately 19 days, contributing to the lush landscapes that the region is renowned for. With humidity levels hovering around 85%, visitors can expect a refreshing, though often damp, experience in this stunning natural paradise.
In September, the temperatures at Arthur's Pass, New Zealand begin to hint at the promise of spring. With a minimum of -8°C (18°F) and a maximum reaching 13°C (56°F), the month showcases a gradual warming trend as the region shakes off the winter chill. The average temperature sits at around 4°C (40°F), a notable improvement compared to the colder months preceding it. This shift not only marks an increase in temperatures but also offers a fresh awakening to the stunning landscape, inviting outdoor enthusiasts to explore the vivid scenery as nature reawakens. As the crisp air gives way to milder weather, September signals the perfect time for adventurers to revel in the breathtaking beauty of this iconic destination.
In September, Arthur's Pass experiences a significant surge in precipitation, accumulating 270 mm (10.6 in) over 19 days, marking one of the wettest months of the year. This spike follows a relatively drier August with 202 mm (7.9 in) of rain, indicating a shift as winter transitions to spring. The increase in rainfall not only enhances the lush landscapes of this mountainous region but also sets the stage for the even higher totals that emerge in the following months, particularly in November when precipitation typically peaks at 304 mm (12.0 in). This trend highlights the dynamic weather patterns of Arthur's Pass, where September acts as a bridge leading into the wetter conditions of late spring.
In September, Arthur's Pass experiences a consistent humidity level of 85%, mirroring the slightly lower humidity seen in the preceding months of August. This marks the tail end of a season characterized by gradual increases in moisture, peaking during the winter months of May through July, which see humidity levels rise to 87%. As spring approaches in October, humidity levels begin to decline gently, hinting at a transition to drier conditions. Overall, the data reflects a humid environment that remains relatively stable during the early spring, fostering lush vegetation and vibrant ecosystems characteristic of this breathtaking region in New Zealand.
In September, Arthur's Pass, New Zealand, experiences a notable shift in sunlight exposure, with a UV Index of 6, categorized as high. This marks a transition from the relatively low levels of the previous winter months, indicating that the sun's intensity is steadily increasing. With a burn time of only 25 minutes, it's essential for residents and visitors alike to take necessary precautions when enjoying outdoor activities. This upward trend in UV exposure will continue through the spring months, peaking in the summer, as indicated by the data for October and beyond. For more insights and to plan your sun protection strategies, visit Arthur's Pass UV Index.
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As September rolls in, Arthur's Pass begins to bask in a gentle return of sunshine, accumulating around 210 hours of sunlight this month. This marks a noticeable uplift from the dreary winter months, with hours gradually increasing after July's low of 165 hours. The daylight returns steadily as spring approaches, following a pattern where warmth and light rejuvenate the landscape. Comparatively, September's sunshine is a hint of the vibrant October ahead, which typically boasts 245 hours. This seasonal shift signals not just a rise in temperatures but also invites both locals and tourists to revel in the breathtaking beauty of this New Zealand gem, establishing September as a delightful prelude to the more sun-drenched months that lie ahead.
In September, the likelihood of sunny weather in Arthur's Pass, New Zealand hovers at around 21%, reflecting a transitional period as winter gives way to spring. This modest chance of sunshine positions September as a time where the weather starts to shift, creating a slight uptick compared to the rainy winter months of June, July, and August, all of which feature a lower likelihood of sunny days at 19%. As autumn fades, the sun makes a gentle reappearance, although it remains less frequent than in the peak summer months of January and February, which enjoy chances of around 26% to 30%. Overall, while September's sunshine is not guaranteed, it offers a promising signal of the brighter days ahead as the landscape begins to bloom.
As the seasons shift in Arthur's Pass, New Zealand, September heralds the gradual return of longer days, with daylight lasting 11 hours. This increase marks a noticeable transition from the winter months, which saw a consistent 9 hours of daylight from June to August. Following the brief spring respite, October brings a further extension of sunlight to 13 hours, foreshadowing the vibrant days of summer ahead. Interestingly, this upward trend in daylight duration not only enhances the landscape's natural beauty but also invigorates the spirit of outdoor enthusiasts eager to explore the breathtaking surroundings. With each passing month, the slow yet steady rise in daylight highlights the dynamic rhythm of nature in this stunning alpine region.
As September ushers in the promise of spring in Arthur's Pass, New Zealand, the average wind speed experiences a notable uptick, reaching 2.7 m/s (6 mph). This lively breeze sets the stage for a vibrant season, especially as it follows a series of relatively calmer months during winter, with speeds dipping to as low as 1.8 m/s (4 mph) in July. The trend reveals a gradual increase as the year progresses; September marks a refreshing surge, just a precursor to the even brisker winds of December at 2.8 m/s (6 mph). This transitional period not only invigorates the air but also breathes new life into the stunning landscapes, making it an ideal time for outdoor enthusiasts to explore the breathtaking surroundings.
Weather in Arthur's Pass varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Arthur's Pass, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present quite distinct weather patterns. In September, temperatures range from a chilly minimum of -8°C (18°F) to a maximum of 13°C (56°F), with an average temperature of 4°C (40°F). The month is relatively wet, experiencing around 270 mm (10.6 in) of precipitation over 19 days and a high humidity level of 85%. In contrast, January is significantly warmer, with temperatures ranging from a minimum of 0°C (33°F) to a pleasant maximum of 23°C (73°F), boasting an average of 12°C (54°F). While January sees less rainfall at 210 mm (8.3 in) spread over 16 days, humidity remains relatively high at 81%. For a detailed overview of January weather conditions, you can check Arthur's Pass weather in January.
When comparing the weather in September and February, notable differences emerge in both temperature and precipitation. September experiences chilly temperatures, with a minimum of -8°C (18°F) and an average around 4°C (40°F), while February boasts milder conditions, ranging from a minimum of 0°C (33°F) to a pleasant maximum of 22°C (72°F). In terms of rainfall, September sees more precipitation at 270 mm (10.6 in) across 19 days, compared to February's 230 mm (9.0 in) over 15 days. Additionally, the humidity is slightly higher in September at 85%, compared to 79% in February. For more detailed climate insights, check out Arthur's Pass weather in February.
In comparing the weather of September and March, it becomes clear that March generally offers milder conditions. September sees average temperatures ranging from a chilly -8°C (18°F) to a max of 13°C (56°F), and it is relatively wetter, with precipitation totaling 270 mm (10.6 in) over 19 days and a high humidity of 85%. In contrast, March enjoys a more temperate climate, with minimum temperatures around -2°C (29°F) and a comfortable average of 11°C (52°F), peaking at 19°C (67°F). Rainfall is slightly less in March, measuring 229 mm (9.0 in) over 15 days, and with humidity at 81%, conditions feel more pleasant overall. For more detailed information on the March weather, you can visit Arthur's Pass weather in March.
In comparing the weather of September and April, we observe notable differences in temperature and precipitation. September experiences a minimum temperature of -8°C (18°F) and an average of 4°C (40°F), while April has slightly cooler minimums at -10°C (14°F) but a higher average of 8°C (46°F). Max temperatures are also higher in April, reaching 17°C (63°F) compared to September's 13°C (56°F). Regarding precipitation, September sees more rainfall at 270 mm (10.6 in) over 19 days, while April records 228 mm (9.0 in) over 16 days, resulting in a similar humidity level of around 84-85%. For a more detailed look at April weather patterns, you can visit Arthur's Pass weather in April.
In comparing the weather of September and May, it's evident that both months experience cool temperatures, though September generally has slightly milder conditions. In September, the average temperature hovers around 4°C (40°F), with a minimum of -8°C (18°F) and a maximum of 13°C (56°F), while May sees a marginally higher average of 5°C (42°F), with minimums and maximums of -9°C (16°F) and 15°C (58°F), respectively. Precipitation levels are also notable; September records 270 mm (10.6 in) over 19 days, compared to May's 243 mm (9.6 in) over 17 days. Humidity remains high in both months, with September at 85% and May slightly higher at 87%. For more specific details on May weather conditions, you can refer to Arthur's Pass weather in May.
In comparing the weather of September and June, both months exhibit similar maximum temperatures, around 13°C (56°F), but experience notable differences in their overall conditions. September sees a slightly higher average temperature of 4°C (40°F) compared to June’s average of 3°C (37°F), paired with increased rainfall of 270 mm (10.6 in) over 19 rainy days, compared to June’s 137 mm (5.4 in) over 15 days. Humidity remains high in both months, with September at 85% and June slightly higher at 87%. For more detailed insights into the weather conditions, you can visit Arthur's Pass weather in June.
When comparing the weather in September and July, both months exhibit striking similarities, yet also notable differences. September has slightly milder temperatures, with an average of 4°C (40°F) and a maximum of 13°C (56°F), while July tends to be cooler, averaging 2°C (36°F) with a maximum of 10°C (51°F). Interestingly, both months receive roughly the same amount of precipitation, with September recording 270 mm (10.6 in) over 19 days and July 269 mm (10.6 in) over 17 days. Humidity levels are also quite high in both months, with September at 85% and July slightly higher at 87%. For a more detailed look at July weather, you can visit Arthur's Pass weather in July.
In comparing the weather patterns of September and August, September experiences slightly milder temperatures, with an average of 4°C (40°F) compared to August's 3°C (37°F). Additionally, the minimum temperatures in September are less severe, at -8°C (18°F) versus August's -11°C (13°F). However, September sees an increase in precipitation, with 270 mm (10.6 in) over 19 days, compared to August's 202 mm (7.9 in) across 20 days. Both months share the same humidity level of 85%. For more detailed information, you can check Arthur's Pass weather in August.
September and October present notable contrasts in weather patterns. In September, temperatures range from a chilly min of -8°C (18°F) to a max of 13°C (56°F), with an average of 4°C (40°F). The month is characterized by significant precipitation, totaling 270 mm (10.6 in) over 19 days, accompanied by high humidity at 85%. In comparison, October sees a slight decrease in total precipitation to 251 mm (9.9 in) across 21 days, while temperatures rise, with a minimum of -12°C (11°F), an average of 7°C (44°F), and a maximum reaching 18°C (64°F). Despite slightly lower humidity at 84%, October offers a generally more moderate climate. For more detailed insights, check Arthur's Pass weather in October.
In comparing the weather between September and November, we see a marked increase in temperatures during November. While September experiences a temperature range from a chilly minimum of -8°C (18°F) to a maximum of 13°C (56°F), November's temperatures rise, with a minimum of -4°C (25°F) and a pleasant maximum of 20°C (68°F). Both months have similar precipitation patterns, with November seeing slightly higher rainfall at 304 mm (12.0 in) compared to September's 270 mm (10.6 in), although both months receive precipitation on approximately 19 days. Humidity levels remain relatively close as well, with September at 85% and November at 82%. For more details about the weather in November, you can check out Arthur's Pass weather in November.
In September, the weather is notably cooler, with temperatures ranging from a minimum of -8°C (18°F) to a maximum of 13°C (56°F) and an average of 4°C (40°F). This month experiences considerable precipitation, totaling 270 mm (10.6 in) over 19 days, and the humidity sits at a high 85%. In contrast, December sees a significant warming trend, with temperatures ranging from a minimum of -1°C (31°F) to a maximum of 22°C (72°F) and an average of 11°C (52°F). While December has slightly more precipitation at 285 mm (11.2 in) over the same number of rainy days, the humidity remains quite similar at 84%. For more insights into December weather, you can check out Arthur's Pass weather in December.
September in Arthur's Pass marks the transition from winter to spring, as temperatures begin to rise, offering a refreshing contrast to the colder months. With an average of 4°C (40°F), the chill is still present, particularly at night when it can dip to a brisk -8°C (18°F). This month is also quite wet, seeing significant rainfall that contributes to the area's lush landscapes, with 19 days of precipitation adding to the overall humidity of around 85%. While the weather can be unpredictable, visitors can expect a blend of cool, crisp days interspersed with wetter conditions, making it a unique time to experience the stunning beauty of the region. For more details on the weather trends throughout the year, visit Arthur's Pass Climate.