Monthly climate guide
Nelson weather in September
Expect cool weather in Nelson in September: afternoons reach about 12°C (53°F), while nights drop to around 3°C (38°F). Around 84 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are 2°C warmer than August and 2°C cooler than October.
What stands out in September
- Nelson is usually about 2°C cooler than Christchurch, 260 km away, in September.
- September brings early spring to Nelson — the seasons are reversed south of the equator.
Avg high
12°C
53°F
Avg low
3°C
38°F
Rainfall
84 mm
some rain
Humidity
85%
relative
Sky
57%
cloud · often cloudy
Nelson weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 22°C / 71°F | 11°C / 51°F | 77 mm | 70% | 58% |
| February | 22°C / 72°F | 11°C / 51°F | 64 mm | 69% | 53% |
| March | 20°C / 67°F | 9°C / 49°F | 86 mm | 76% | 58% |
| April | 15°C / 60°F | 7°C / 44°F | 107 mm | 83% | 55% |
| May | 12°C / 54°F | 5°C / 41°F | 109 mm | 88% | 52% |
| June | 9°C / 49°F | 3°C / 37°F | 106 mm | 92% | 52% |
| July | 8°C / 47°F | 2°C / 36°F | 96 mm | 91% | 53% |
| August | 10°C / 49°F | 3°C / 37°F | 85 mm | 90% | 56% |
| September | 12°C / 53°F | 3°C / 38°F | 84 mm | 85% | 57% |
| October | 14°C / 57°F | 5°C / 41°F | 91 mm | 83% | 61% |
| November | 16°C / 61°F | 7°C / 44°F | 72 mm | 79% | 62% |
| December | 19°C / 67°F | 9°C / 49°F | 102 mm | 75% | 64% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Nelson?
Compare the months in the chart above to find your ideal window.
Best time to visit Nelson →Other New Zealand cities in September
Cite or embed this data
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Nelson weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/new-zealand/nelson/september
<a href="https://weathercompare.eu/weather/new-zealand/nelson/september">Nelson weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/new-zealand/nelson" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Nelson weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/new-zealand/nelson/september">Nelson weather in September</a> – WeatherCompare</p>
Nelson in September: quick answers
Is September a good time to visit Nelson?
September is cool in Nelson, with highs around 12°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Nelson in September?
Average highs are about 12°C (53°F) and average lows about 3°C (38°F), based on 10 years of daily data.
Does it rain a lot in Nelson in September?
Nelson typically gets around 84 mm of rain in September — some rain.
Figures are long-term averages for the area around Nelson (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.