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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 8.1–13.7°C, 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 5.9–6.3°C, 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 9.0–13.0°C, gradually warming with less rainfall. Common activities: Hiking, exploring nature. Recommended clothing: Light jacket, long pants, comfortable shoes.
  • Winter (December–February): Average 15.2–16.4°C, 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. 10.9°C / Annual rainfall: approx. 801 mm / Summer humidity: 60%–70% / Rainiest month: July

south island monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
16.4°C
42
February
15.6°C
71.7
March
13.7°C
66.1
April
11.2°C
49
May
8.1°C
45.1
June
6.1°C
54.1
July
5.9°C
142.3
August
6.3°C
60.8
September
9°C
55
October
10.6°C
79.1
November
13°C
73.5
December
15.2°C
63.1

south island weather for the next seven days

11/22
Saturday
Patchy rain nearby
9.5°C/5.2°C
11/23
Sunday
Patchy rain nearby
16.1°C/5.4°C
11/24
Monday
Patchy rain nearby
6.6°C/4.3°C
11/25
Tuesday
Partly Cloudy
15.7°C/5.1°C
11/26
Wednesday
Sunny
19.7°C/9°C
11/27
Thursday
Patchy rain nearby
19.5°C/13.6°C
11/28
Friday
Patchy rain nearby
12°C/5.4°C