Southland has a temperate climate with warm summers and mild winters.
Southland has an average annual temperature of 9.5°C across all 4 cities, with approximately 1424 mm of annual precipitation and average humidity of 84%. Temperatures peak in February and drop to their lowest in July, while rainfall is highest during winter months.
The warmest city is Invercargill with average July highs of 9.3°C, while Te Anau is the coldest with average January lows of 6.8°C. Humidity remains high throughout the year creating warm and humid conditions. These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
| Month | 🌤️ | Avg High | Avg Temp | Avg Low | Record High | Record Low | Humid % | Rain (mm) | Wind (m/s) | Solar (kWh/m²) |
|---|---|---|---|---|---|---|---|---|---|---|
| January | ⛅ | 16.9°C | 13.2°C | 9.6°C | 31.4°C | -0.2°C | 79% | 136 | 3.6 | 5.80 |
| February | ⛅ | 16.9°C | 13.3°C | 9.7°C | 32.4°C | -0.2°C | 80% | 110 | 3.4 | 5.00 |
| March | ⛅ | 15.4°C | 12.0°C | 8.7°C | 27.6°C | -2.5°C | 82% | 116 | 3.4 | 3.60 |
| April | ⛅ | 13.0°C | 10.2°C | 7.3°C | 24.4°C | -3.0°C | 85% | 118 | 3.5 | 2.30 |
| May | ⛅ | 10.5°C | 8.2°C | 5.9°C | 21.2°C | -8.4°C | 88% | 131 | 3.6 | 1.40 |
| June | ⛅ | 8.3°C | 6.2°C | 4.2°C | 15.7°C | -7.7°C | 89% | 115 | 3.4 | 1.00 |
| July | ⛅ | 7.7°C | 5.7°C | 3.6°C | 15.1°C | -11.9°C | 89% | 107 | 3.3 | 1.20 |
| August | ⛅ | 8.9°C | 6.4°C | 3.9°C | 17.9°C | -7.0°C | 86% | 101 | 3.4 | 2.00 |
| September | ⛅ | 10.6°C | 7.7°C | 4.7°C | 21.2°C | -4.9°C | 83% | 113 | 3.8 | 3.10 |
| October | ⛅ | 12.1°C | 8.8°C | 5.6°C | 25.8°C | -3.6°C | 81% | 131 | 3.9 | 4.40 |
| November | ⛅ | 13.8°C | 10.3°C | 6.8°C | 26.5°C | -4.1°C | 80% | 117 | 3.8 | 5.50 |
| December | ⛅ | 15.6°C | 12.0°C | 8.4°C | 29.8°C | -0.8°C | 79% | 131 | 3.6 | 6.00 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 4 cities in Southland
🧥 Light layers are sufficient — this Mild Winter stays cool without prolonged hard freezes.
🌤️ Conditions are ideal for outdoor activities throughout the day in this Mild Summer.
☔ Moderate Rainfall expected — carry rain gear and plan outdoor activities around these months.
Region-wide monthly averages across 4 cities · 1981–2025 · °C
Temperatures rise steadily from spring, peak in February, and gradually decline through autumn into winter.
These seasonal patterns offer comfortable conditions year-round, with warm summers and mild winters.
Region-wide monthly rainfall · 1981–2025 · mm/month
💧 Humidity peaks at 89% in June · annual avg 84%
Monthly averages · 1981–2025
Across 45 years, Southland's temperature shows a slight warming trend over the past decade. 2023 was the warmest year overall and 1992 the coolest.
The warmest year on record was 2023 (avg: 10.6°C), while the coldest year was 1992 (avg: 8.4°C).
Averaged across all 4 cities in Southland · Last 30 years · °C
Averaged across all 4 cities in Southland · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 4 cities in Southland for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 13.1°C | 10.1°C | 7.1°C | 28.9°C | -3.2°C | 1512 | 83% | 3.5 m/s |
2024 🌧️ | 12.5°C | 9.6°C | 6.7°C | 29.5°C | -4.7°C | 1883 | 84% | 3.6 m/s |
2023 🔥 | 13.7°C | 10.6°C | 7.4°C | 32.4°C | -2.5°C | 1538 | 83% | 3.4 m/s |
2022 | 13.6°C | 10.5°C | 7.3°C | 29.9°C | -4.3°C | 1081 | 83% | 3.2 m/s |
2021 | 13.1°C | 10.1°C | 7.1°C | 29.5°C | -3.4°C | 1670 | 84% | 3.4 m/s |
2020 | 12.9°C | 9.9°C | 6.8°C | 28.6°C | -3.4°C | 1501 | 84% | 3.5 m/s |
2019 | 13.1°C | 10.2°C | 7.2°C | 29.6°C | -3.6°C | 1709 | 83% | 3.7 m/s |
2018 | 13.2°C | 10.3°C | 7.3°C | 31.4°C | -2.7°C | 1528 | 83% | 3.4 m/s |
2017 | 12.9°C | 9.9°C | 6.9°C | 29.2°C | -2.8°C | 1481 | 84% | 3.3 m/s |
2016 | 13.1°C | 10.1°C | 7.0°C | 31.8°C | -5.3°C | 1538 | 83% | 3.5 m/s |
Showing 1 to 10 of 45 years
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.
