Climate Insights for Masterton

The climate in Masterton is temperate. The average annual temperature is 12°C and approximately 1143mm of precipitation falls per year. November is the wettest month, receiving around 181mm of rainfall. Masterton is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: February, January, March. The coldest months are August, July, June, when temperatures can drop to 4°C.

Masterton sees moderate temperature variation throughout the year, ranging from 4°C to 23°C. February is the warmest month, though highs remain moderate at 23°C with a mean of 19°C. August is the coolest month, with minimum temperatures around 4°C and an average of 7°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between March and April, with a 3°C shift in average temperatures.

Masterton is a moderately rainy area, receiving approximately 1143mm of precipitation annually, which averages out to around 95mm per month. The wettest month is November, averaging 181mm of rainfall. May and October also tend to see above-average precipitation. The driest month is March, with just 29mm. That's 152mm less than November, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Masterton is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently winter in Masterton, which began on June 21, 2026. Masterton is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 23°C, while the coldest stretch bottoms out in August near 4°C. Spring is next, beginning on September 23, 2026 — 64 days from now.

The best time to visit Masterton is during January, February and March, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 44mm per month. By contrast, August can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Masterton based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.