Last updated: August 31, 2025
Hamilton, New Zealand, experiences a mild and variable climate in September, with temperatures ranging from a crisp minimum of 0°C (32°F) to a pleasant maximum of 20°C (68°F). The average temperature settles comfortably at 12°C (54°F), offering a balanced atmosphere for outdoor activities. However, September is also marked by frequent rainfall, accumulating to 119 mm (4.7 in) over 15 days, contributing to a humidity level of 77%. Visitors and locals alike should prepare for a mix of sunny spells and showers while enjoying the vibrant spring landscape.
In September, Hamilton, New Zealand, begins to shake off the last remnants of winter, with temperatures gradually rising. The minimum temperature settles at 0°C (32°F), signaling a cool start to the month, while the average temperature hovers around 12°C (54°F), creating a refreshing atmosphere perfect for outdoor activities. With a maximum of 20°C (68°F), residents can finally enjoy milder days, hinting at the onset of spring. This month marks a transition, as Hamilton's temperatures shift from winter's chill to the warmer embrace of spring, showcasing a steady upward trend that invites exploration and rejuvenation.
In September, Hamilton experiences a notable transition in its weather, highlighted by an average precipitation of 119 mm (4.7 in) over 15 days of rainfall. This marks a continuation of the wet conditions typically seen in the winter months, although the total is slightly lower than the previous month’s peak in August, which recorded 149 mm. As spring approaches, these rainy days set the stage for the region’s blooming vegetation, contrasting with the drier patterns expected in the upcoming summer. Overall, September serves as a reminder of Hamilton's dynamic climate, providing essential moisture before the drier months ahead.
In September, Hamilton, New Zealand experiences a noticeable shift in humidity, with levels averaging 77%. This marks a slight decrease from the peak ambient moisture of 82% seen in July, indicating the transition into spring. Throughout the year, humidity consistently hovers around the mid-70s to low 80s, with April and February sharing the 73% mark as the most comfortable months. Interestingly, after a spike in humidity during the winter months of June and July, September's levels begin to moderate, setting the stage for October’s expected drop to 76%. Overall, Hamilton's humidity trends illustrate a rhythmic pattern influenced by seasonal changes, creating a distinct experience for residents and visitors alike.
As September arrives in Hamilton, New Zealand, the UV Index sees a notable shift towards higher values, peaking at 7, which falls into the high exposure category. This increase marks a transition from the cooler winter months, where UV levels remained moderate, to springtime conditions that require more vigilance when it comes to sun protection. With a burn time of just 25 minutes, it’s essential for residents and visitors alike to be aware of their UV exposure and take appropriate precautions. In contrast to the extreme levels experienced during the summer months, September’s UV Index serves as a reminder that while the sun might feel more temperate, its rays can still be potent. To learn more about daily UV conditions in Hamilton, check out Hamilton UV Index.
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September in Hamilton, New Zealand, brings a delightful transition as sunshine hours surge to 245—a refreshing uptick from the cooler months of winter. This increase signals the beginning of spring, where days grow longer and brighter, enhancing the vibrant atmosphere of the city. Following the trend of consistent daylight, October promises even more solar warmth with 263 hours, while the year’s sunshine peaks in December at 329 hours. The gradual climb from 175 hours in June showcases Hamilton’s charm, inviting locals and visitors alike to revel in the scenic beauty and outdoor adventures that flourish with each passing sunlit day.
In Hamilton, New Zealand, September typically brings a 37% chance of sunny weather, aligning closely with the averages seen in the preceding months of July and August. While this percentage might not promise a picture-perfect patio season, it does suggest lingering whispers of sunlight as winter recedes. Interestingly, following this transitional month, the likelihood of sunshine steeply declines in October, dropping to just 25%. This trend indicates that while September offers a glimmer of hope for sun-seekers, the shift towards spring might still come with its share of overcast days, making it a month of delightful yet unpredictable weather. So, if you find yourself in Hamilton in September, be prepared to embrace both the sun and the clouds!
As September unfolds in Hamilton, New Zealand, daylight begins to gradually extend, offering 11 hours of light—a subtle shift from the shorter days of winter. This increase marks the transition towards spring, stepping away from the deep darkness of June and July, which both feature just 9 hours of daylight. Following the patterns of the year, September's daylight duration hints at the brighter months ahead, with October's 13 hours and November’s peak of 14 hours on the horizon. The rhythm of daylight underscores a refreshing renewal of energy and life, inviting residents to embrace the season's change.
As September sweeps into Hamilton, New Zealand, the wind begins to pick up, heralding the transition to spring. With an average wind speed of 4.3 m/s (10 mph), September stands out as the month with the strongest gusts since May, showcasing a noticeable increase from August's 3.9 m/s (9 mph). This trend of escalating winds continues through late winter, peaking in early spring before beginning to taper off in October. The consistent rise in wind speeds from the cooler months suggests a shift toward more dynamic weather patterns, breathing life into the lush landscapes of Hamilton and invigorating the atmosphere as nature awakens.
Weather in Hamilton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hamilton, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, a stark contrast emerges. September experiences cooler temperatures, with a minimum of 0°C (32°F), an average of 12°C (54°F), and a maximum of 20°C (68°F). The month is also quite wet, with 119 mm (4.7 in) of precipitation spread over 15 days, contributing to a humidity level of 77%. In contrast, January is significantly warmer, featuring a minimum temperature of 8°C (47°F), an average of 20°C (68°F), and reaching a maximum of 29°C (85°F). It enjoys much less rainfall, with only 56 mm (2.2 in) over 6 days, leading to a slightly lower humidity of 75%. For more detailed information about January weather, you can visit Hamilton weather in January.
September and February exhibit distinct weather patterns in Hamilton. September is characterized by cooler temperatures, with a minimum of 0°C (32°F) and an average of 12°C (54°F), while February boasts milder conditions, with a minimum of 7°C (45°F) and an average of 20°C (68°F). Precipitation is more frequent in September, totaling 119 mm (4.7 in) over 15 days, compared to February's 81 mm (3.2 in) over just 9 days. Additionally, September has a higher humidity level at 77%, as opposed to February's 73%. For a detailed overview of February's climate, you can check Hamilton weather in February.
September and March present distinct weather patterns. In September, temperatures range from a chilly 0°C (32°F) at night to a mild 20°C (68°F) during the day, with an average of 12°C (54°F). This month also experiences significant rainfall, totaling 119 mm (4.7 in) over approximately 15 days, contributing to a humid atmosphere with 77% humidity. In contrast, March features a warmer climate, with temperatures ranging from a minimum of 7°C (45°F) to a high of 29°C (84°F), averaging 18°C (65°F). Precipitation is lower at 94 mm (3.7 in) across about 10 days, accompanied by slightly less humidity at 73%. Overall, March offers a more temperate and drier experience compared to the cooler and wetter September. For more details, you can check Hamilton weather in March.
September and April showcase contrasting weather patterns, with September experiencing cooler temperatures and higher humidity. In September, temperatures range from a chilly 0°C (32°F) to a mild maximum of 20°C (68°F) with an average of 12°C (54°F). Additionally, this month sees 119 mm (4.7 in) of precipitation spread over 15 days, resulting in a humidity level of 77%. In contrast, April offers a more temperate climate, with minimum temperatures of 4°C (39°F) and highs reaching 24°C (75°F), averaging at 15°C (60°F). This month has slightly less precipitation, at 117 mm (4.6 in) over 11 days, and lower humidity at 73%. For a detailed look at April weather, visit Hamilton weather in April.
When comparing the weather in September and May, both months present a transitional climate, yet with distinct characteristics. In September, the temperatures range from a minimum of 0°C (32°F) to a maximum of 20°C (68°F), accompanied by an average temperature of 12°C (54°F). This month typically experiences 119 mm (4.7 in) of precipitation over about 15 days, with a humidity level of 77%. In contrast, May sees slightly cooler temperatures, ranging from a minimum of -2°C (29°F) to a maximum of 22°C (71°F), with an average temperature of 13°C (55°F). Precipitation in May is somewhat less at 107 mm (4.2 in) over 11 days, with a marginally higher humidity of 79%. For a deeper look at the weather specifics for May, you can refer to Hamilton weather in May. Overall, while both months are marked by similar humidity levels and precipitation, May edges out September with higher maximum temperatures and slightly less rainfall.
When comparing the weather in September and June, both months exhibit mild temperatures with maximums reaching 20°C (68°F). September tends to have a slightly higher average temperature at 12°C (54°F) compared to June's average of 11°C (52°F). Interestingly, while June starts with a minimum temperature of -2°C (29°F), September rarely drops below 0°C (32°F). Precipitation levels are comparable, with September receiving 119 mm (4.7 in) over 15 days, while June has 104 mm (4.1 in) over 12 days. Humidity is also slightly higher in June at 81%, versus September's 77%. For more detailed insights, you can check Hamilton weather in June.
In comparing the weather conditions of September and July, we see that September tends to be slightly warmer, with average temperatures reaching 12°C (54°F) compared to July's average of 10°C (50°F). The maximum temperature in September is also higher at 20°C (68°F), while July peaks at 18°C (65°F). However, both months experience significant precipitation; September receives 119 mm (4.7 in) over 15 days, while July has slightly more at 131 mm (5.1 in) across 13 days. Humidity levels in September are slightly lower at 77% compared to July's 82%. For more detailed insights, check out Hamilton weather in July.
In comparing the weather of September and August, September exhibits slightly warmer temperatures with a minimum of 0°C (32°F) and an average of 12°C (54°F), while August experiences a cooler minimum of -4°C (25°F) and an average of 11°C (52°F). The maximum temperature in September reaches 20°C (68°F), compared to August's maximum of 18°C (64°F). Although September has lower precipitation at 119 mm (4.7 in) over 15 days, August has a higher total of 149 mm (5.9 in) across 16 days. Humidity levels are relatively close, with September at 77% and August slightly higher at 79%. For more detailed information, you can explore Hamilton weather in August.
September and October exhibit notable differences in weather patterns. In September, temperatures range from a chilly minimum of 0°C (32°F) to a more pleasant maximum of 20°C (68°F), with an average of 12°C (54°F). Precipitation is relatively high at 119 mm (4.7 in) over 15 days, accompanied by a humidity level of 77%. By October, the weather transitions to slightly warmer conditions, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 22°C (72°F), and an average of 14°C (57°F). Precipitation decreases slightly to 107 mm (4.2 in) over 14 days, and humidity dips marginally to 76%. For more details on October weather patterns in Hamilton, check out Hamilton weather in October.
In September, temperatures in Hamilton range from a chilly minimum of 0°C (32°F) to a comfortable maximum of 20°C (68°F), with an average of 12°C (54°F). The month sees considerable rainfall, amounting to 119 mm (4.7 in) over approximately 15 days, and maintains a relatively high humidity level of 77%.
In contrast, November brings a milder climate, with minimum temperatures around 6°C (43°F) and maximum temperatures reaching up to 27°C (80°F), averaging 16°C (62°F). Precipitation decreases to 87 mm (3.4 in) over 12 days, with a slightly lower humidity of 75%. This shift indicates a transition to drier and warmer conditions as the season progresses. For more detailed information, you can check Hamilton weather in November.
In comparing the weather between September and December, we observe a significant shift in temperature and precipitation patterns. September features cooler temperatures with a minimum of 0°C (32°F) and an average of 12°C (54°F), while December enjoys milder conditions, with a minimum of 5°C (42°F) and an average of 19°C (66°F). Although September experiences slightly more precipitation at 119 mm (4.7 in) over 15 days, December is not far behind with 112 mm (4.4 in) across 13 days. Additionally, humidity decreases slightly from 77% in September to 74% in December, contributing to a more comfortable climate as the year comes to a close. For more detailed information, check out Hamilton weather in December.
As September unfolds in Hamilton, the weather begins its subtle transition from winter to spring, marked by mild temperatures and increasing humidity. While the days may start cool, with the chill of early mornings lingering, the gradual rise in warmth offers a refreshing change from the colder months. This transitional period also sees a notable increase in precipitation, with rain showers becoming more frequent, contributing to the lush greenery that the region is known for. Unlike the frosty grip of winter, September embodies a sense of rejuvenation, making it a unique time to experience the beauty of Hamilton. For a deeper understanding of the local climate, check out Hamilton Climate.