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south island

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south island Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

south island year round climate

  • Spring (March–May): Average 46–56°F, cool and rainy with occasional warm sunshine. Common activities: Hiking, flower viewing (e.g., some hardy flowers). Recommended clothing: Waterproof jacket, warm layers, comfortable hiking boots.
  • Summer (June–August): Average 42–43°F, cold and damp with high rainfall, especially in July. Common activities: Indoor activities, museum visits, onsen experiences. Recommended clothing: Warm waterproof jacket, sweaters, long pants, waterproof shoes.
  • Autumn (September–November): Average 48–55°F, gradually warming with less rainfall. Common activities: Hiking, exploring nature. Recommended clothing: Light jacket, long pants, comfortable shoes.
  • Winter (December–February): Average 59–61°F, mild with moderate rainfall. Common activities: Outdoor activities, beach walks (weather permitting). Recommended clothing: Light jacket, long pants, comfortable shoes.

south island climatological average

Annual average temperature: approx. 51.6°F / Annual rainfall: approx. 801 mm / Summer humidity: 60%–70% / Rainiest month: July

south island monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
61.5°F
42
February
60.1°F
71.7
March
56.7°F
66.1
April
52.2°F
49
May
46.6°F
45.1
June
43°F
54.1
July
42.6°F
142.3
August
43.3°F
60.8
September
48.2°F
55
October
51.1°F
79.1
November
55.4°F
73.5
December
59.4°F
63.1

south island weather for the next seven days

2/23
Monday
Sunny
72.2°F/39.2°F
2/24
Tuesday
Patchy rain nearby
60.4°F/42.9°F
2/25
Wednesday
Sunny
76.6°F/43.7°F
2/26
Thursday
Moderate rain
62.9°F/45.8°F
2/27
Friday
Patchy rain nearby
48.6°F/40.3°F
2/28
Saturday
Sunny
61°F/38.1°F
3/1
Sunday
Patchy rain nearby
50.9°F/43.4°F