Hamilton Weather in September
In Hamilton, September brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 8°C (46°F). Expect quite a bit of rainfall this month.
Rainfall in Hamilton in September
You can expect rain on around 17 days based on historical patterns, with 124 mm (4.9 in) average for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Hamilton in September
September in Hamilton brings typical temperatures with highs around 17°C (63°F) and lows of 8°C (46°F). Conditions are often most pleasant around the middle of the day. With overnight lows of 8°C (46°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Hamilton in September
The month experiences a moderate amount of sunlight, with 148 hours of sunshine. This provides a nice balance between sunshine and clouds.September in Hamilton has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Hamilton's climate page.
Hamilton Temperature in September
Min Temperature
8°C (46°F)
Max Temperature
17°C (63°F)
Chance of Rain
56%
Precipitation
124 mm (4.9 in)
Rainy days
17 days
Humidity
83%
Sunshine
148 hours
Percentage Sunshine
Historical weather for Hamilton in September
Browse day-by-day weather records for Hamilton spanning 23 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hamilton historical weather extremes in September
Our historical data for Hamilton spans 2006 to 2025, revealing these weather extremes.
- On September 21, 2023, temperatures climbed to 23°C (73°F), marking the warmest September day on record.
- On September 5, 2022, Hamilton saw its coldest September day with temperatures maxing out at 10°C (50°F).
- Hamilton registered its coldest September night on September 6, 2009, with temperatures dropping to -3°C (27°F).
- Peak precipitation in September occurred on September 23, 2021, when 62 mm (2.4 in) of precipitation was measured.
Best Places in New Zealand in September
Find out more about the weather in New Zealand and which places have the best travel conditions in this month. See all of New Zealand in September →
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What to Wear in Hamilton in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Hamilton in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Hamilton's climate page.
Temperature Rainfall Sunshine Humidity
See the full Hamilton climate overview or explore weather in New Zealand.
