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Hamilton Weather by Month
Average temperatures, rainfall and humidity for Hamilton, New Zealand, month by month, built from OpenWeather's historical records. Use it to see what a typical Hamilton month looks like before you travel — then check the live Hamilton forecast for the days ahead.
Warmest month
February
25°C average high
Coolest month
August
6°C average low
Wettest month
April
147 mm of rain
Driest month
January
52 mm of rain
Average temperature and rainfall in Hamilton by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 25°C | 14°C | 4°C / 32°C | 52 mm | 76% | 12 km/h |
| February | 25°C | 14°C | 5°C / 31°C | 60 mm | 77% | 10 km/h |
| March | 23°C | 12°C | 3°C / 29°C | 60 mm | 77% | 10 km/h |
| April | 20°C | 11°C | 0°C / 26°C | 147 mm | 78% | 10 km/h |
| May | 17°C | 8°C | -4°C / 23°C | 83 mm | 80% | 9 km/h |
| June | 15°C | 7°C | -4°C / 21°C | 90 mm | 87% | 11 km/h |
| July | 14°C | 6°C | -7°C / 21°C | 102 mm | 87% | 11 km/h |
| August | 15°C | 6°C | -4°C / 19°C | 87 mm | 86% | 12 km/h |
| September | 16°C | 8°C | -1°C / 22°C | 85 mm | 84% | 13 km/h |
| October | 18°C | 9°C | -2°C / 24°C | 65 mm | 82% | 13 km/h |
| November | 20°C | 11°C | -1°C / 27°C | 64 mm | 79% | 13 km/h |
| December | 23°C | 13°C | 2°C / 30°C | 62 mm | 79% | 12 km/h |
Best time to visit Hamilton
The most comfortable time to visit Hamilton is generally March and December to January, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around April, totalling about 956 mm a year.
Travellers who prefer heat should aim for February, when highs average 25°C. April is the month to avoid if rain would spoil your plans — it averages 147 mm, roughly 3× the rainfall of January.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Hamilton forecast for what is happening now.