Climate Insights for Butterworth

The climate in Butterworth is temperate. The average annual temperature is 16°C and approximately 264mm of precipitation falls per year. September is the wettest month, receiving around 33mm of rainfall. Butterworth 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: September, October, November. The coldest months are May, June, April, when temperatures can drop to -2°C.

Temperatures in Butterworth vary considerably across the year, with a 23°C difference between the coldest and warmest months. September is the warmest month, though highs remain moderate at 21°C with a mean of 20°C. The coldest month is May, when overnight lows fall to -2°C and the daily average is 4°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between April and May, with a 9°C shift in average temperatures.

Butterworth is a quite dry location, receiving approximately 264mm of precipitation annually, which averages out to around 22mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is April, with just 0mm. That's 33mm less than January, 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.

Butterworth is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 11km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently winter in Butterworth, which began on June 21, 2026. Butterworth 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 September at around 21°C, while the coldest stretch bottoms out in May near -2°C. Spring is next, beginning on September 23, 2026 — 16 days from now.

The best time to visit Butterworth is during January, February, March, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 25mm per month. By contrast, May can be quite cold with temperatures dropping to -2°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Butterworth 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.