Marlborough has a temperate climate with warm summers and mild winters.
Marlborough has an average annual temperature of 11.2°C across all 1 city, with approximately 863 mm of annual precipitation and average humidity of 82%. Temperatures peak in February and drop to their lowest in July, while rainfall is highest during summer months.
The warmest city is Blenheim with average July highs of 9.2°C, while Blenheim is the coldest with average January lows of 11.1°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 | ☀️ | 21.7°C | 16.4°C | 11.1°C | 32.2°C | 4.0°C | 71% | 59 | 2.4 | 6.60 |
| February | ☀️ | 21.8°C | 16.5°C | 11.3°C | 32.2°C | 3.3°C | 72% | 57 | 2.3 | 5.80 |
| March | 🌤️ | 19.5°C | 14.6°C | 9.8°C | 28.2°C | 2.5°C | 77% | 63 | 2.2 | 4.60 |
| April | 🌤️ | 16.2°C | 11.9°C | 7.6°C | 23.8°C | 0.3°C | 82% | 70 | 2.1 | 3.20 |
| May | ⛅ | 12.9°C | 9.3°C | 5.6°C | 19.9°C | -1.0°C | 87% | 80 | 2.1 | 2.20 |
| June | ⛅ | 10.0°C | 6.9°C | 3.7°C | 16.9°C | -2.0°C | 90% | 91 | 2.1 | 1.60 |
| July | ⛅ | 9.2°C | 6.1°C | 2.9°C | 14.3°C | -2.5°C | 90% | 89 | 2.1 | 1.80 |
| August | 🌤️ | 10.3°C | 6.8°C | 3.4°C | 16.6°C | -2.6°C | 88% | 76 | 2.1 | 2.70 |
| September | 🌤️ | 12.3°C | 8.4°C | 4.4°C | 19.1°C | -1.5°C | 85% | 69 | 2.4 | 3.80 |
| October | 🌤️ | 14.4°C | 10.1°C | 5.8°C | 22.7°C | -0.6°C | 83% | 72 | 2.5 | 5.00 |
| November | 🌤️ | 16.6°C | 12.1°C | 7.5°C | 25.2°C | 0.7°C | 79% | 63 | 2.5 | 6.10 |
| December | 🌤️ | 19.1°C | 14.4°C | 9.7°C | 28.6°C | 2.3°C | 76% | 72 | 2.5 | 6.40 |
Showing average climate conditions across 45 years (1981–2025) · averaged across all 1 cities in Marlborough
🧥 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 90% in July · annual avg 82%
Monthly averages · 1981–2025
Across 45 years, Marlborough's temperature has remained relatively stable over the past decade. 1998 was the warmest year overall and 1992 the coolest.
The warmest year on record was 1998 (avg: 11.9°C), while the coldest year was 1992 (avg: 9.6°C).
Averaged across all 1 cities in Marlborough · Last 30 years · °C
Averaged across all 1 cities in Marlborough · Last 30 years · mm/year
🔥 hottest · ❄️ coldest · 🌧️ wettest
ℹ️ Values are averages across all 1 cities in Marlborough for each year.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall (mm) | Avg Humidity | Avg Wind |
|---|---|---|---|---|---|---|---|---|
2025 | 15.6°C | 11.5°C | 7.4°C | 27.2°C | -1.5°C | 1127 | 84% | 2.2 m/s |
2024 | 15.8°C | 11.5°C | 7.2°C | 28.6°C | -1.1°C | 859 | 82% | 2.2 m/s |
2023 | 15.3°C | 11.5°C | 7.7°C | 25.8°C | -0.7°C | 1033 | 85% | 2.2 m/s |
2022 | 15.1°C | 11.5°C | 7.8°C | 25.8°C | -1.2°C | 1284 | 86% | 2.3 m/s |
2021 | 15.5°C | 11.5°C | 7.4°C | 31.1°C | -2.5°C | 1040 | 84% | 2.3 m/s |
2020 | 15.7°C | 11.5°C | 7.3°C | 30.1°C | -0.2°C | 839 | 82% | 2.3 m/s |
2019 | 16.0°C | 11.7°C | 7.4°C | 31.8°C | -0.8°C | 949 | 82% | 2.3 m/s |
2018 | 15.2°C | 11.4°C | 7.6°C | 28.5°C | 0.1°C | 1238 | 86% | 2.2 m/s |
2017 | 15.3°C | 11.3°C | 7.3°C | 26.5°C | -1.0°C | 1014 | 84% | 2.2 m/s |
2016 | 15.7°C | 11.6°C | 7.4°C | 29.3°C | -2.6°C | 1040 | 83% | 2.3 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.
