Chatham Islands has a warm temperate climate with warm summers and mild winters.
Chatham Islands has an average annual temperature of 12.1°C across all 1 city, with approximately 844 mm of annual precipitation and average humidity of 83%. Temperatures peak in February and drop to their lowest in August, while rainfall is highest during summer months.
The warmest city is Waitangi with average July highs of 10.5°C, while Waitangi is the coldest with average January lows of 13.6°C. Humidity remains high throughout the year, especially during winter months, 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 | 🌤️ | 15.9°C | 14.7°C | 13.6°C | 19.9°C | 9.7°C | 83% | 58 | 6.2 | 6.20 |
| February | ☀️ | 16.3°C | 15.2°C | 14.1°C | 20.3°C | 9.3°C | 83% | 67 | 6.0 | 5.20 |
| March | ⛅ | 15.7°C | 14.6°C | 13.6°C | 19.4°C | 9.3°C | 83% | 81 | 6.4 | 3.90 |
| April | 🌤️ | 14.3°C | 13.3°C | 12.3°C | 18.1°C | 6.4°C | 83% | 69 | 6.9 | 2.60 |
| May | 🌤️ | 12.9°C | 11.9°C | 10.9°C | 17.5°C | 6.6°C | 83% | 76 | 7.1 | 1.60 |
| June | ⛅ | 11.5°C | 10.5°C | 9.5°C | 16.2°C | 4.0°C | 83% | 93 | 7.5 | 1.20 |
| July | 🌤️ | 10.5°C | 9.6°C | 8.7°C | 14.1°C | 3.9°C | 83% | 69 | 7.1 | 1.40 |
| August | 🌤️ | 10.5°C | 9.5°C | 8.6°C | 13.8°C | 4.2°C | 83% | 70 | 6.9 | 2.20 |
| September | 🌤️ | 11.0°C | 9.9°C | 8.9°C | 14.3°C | 4.1°C | 84% | 65 | 7.1 | 3.30 |
| October | 🌤️ | 11.7°C | 10.6°C | 9.5°C | 15.5°C | 4.5°C | 84% | 66 | 6.9 | 4.60 |
| November | 🌤️ | 12.9°C | 11.8°C | 10.7°C | 16.8°C | 5.4°C | 84% | 69 | 6.6 | 5.90 |
| December | 🌤️ | 14.5°C | 13.4°C | 12.3°C | 18.5°C | 7.4°C | 84% | 61 | 6.3 | 6.20 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 1 cities in Chatham Islands
🧥 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 1 city · 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 84% in December · annual avg 83%
Monthly averages · 1981–2025
Across 45 years, Chatham Islands'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: 13.1°C), while the coldest year was 1992 (avg: 10.9°C).
Averaged across all 1 cities in Chatham Islands · Last 30 years · °C
Averaged across all 1 cities in Chatham Islands · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 1 cities in Chatham Islands for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 13.8°C | 12.8°C | 11.8°C | 18.2°C | 6.4°C | 893 | 85% | 6.9 m/s |
2024 | 13.4°C | 12.4°C | 11.3°C | 19.0°C | 6.1°C | 868 | 85% | 6.8 m/s |
2023 🔥 | 14.0°C | 13.1°C | 12.1°C | 19.0°C | 6.5°C | 749 | 83% | 6.7 m/s |
2022 | 13.4°C | 12.5°C | 11.5°C | 18.4°C | 6.3°C | 827 | 84% | 6.9 m/s |
2021 | 13.5°C | 12.6°C | 11.6°C | 19.0°C | 5.4°C | 807 | 84% | 6.6 m/s |
2020 | 13.2°C | 12.3°C | 11.3°C | 18.8°C | 5.5°C | 601 | 83% | 6.7 m/s |
2019 | 14.0°C | 13.0°C | 11.9°C | 19.5°C | 6.3°C | 737 | 84% | 6.8 m/s |
2018 | 13.9°C | 13.0°C | 12.0°C | 20.1°C | 7.5°C | 793 | 83% | 6.7 m/s |
2017 | 13.6°C | 12.6°C | 11.7°C | 18.4°C | 7.7°C | 806 | 83% | 6.3 m/s |
2016 | 13.2°C | 12.3°C | 11.3°C | 18.8°C | 6.0°C | 807 | 84% | 6.6 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.
