Climate Insights for Half Moon

The climate in Half Moon is warm and mild. The average annual temperature is 18°C and approximately 1652mm of precipitation falls per year. Half Moon receives a notable amount of rainfall throughout the year, including during its driest month. Half Moon is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 4°C. Light snow can occur between January and March.

Temperatures in Half Moon vary considerably across the year, with a 27°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 4°C and an average of 8°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.

Half Moon is a fairly wet location, receiving approximately 1652mm of precipitation annually, which averages out to around 138mm per month. The wettest month is September, averaging 251mm of rainfall. June and August also tend to see above-average precipitation. The driest month is March, with just 81mm. That's 170mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Light snowfall can occur between January and March, totalling around 5cm annually. January is the snowiest month with approximately 3cm.

Half Moon is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 4km/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 1km/h gap between the calmest and windiest months.

It is currently spring in Half Moon, which began on March 20, 2026. Half Moon is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 31°C, while the coldest stretch bottoms out in January near 4°C. Summer is next, beginning on June 21, 2026 — 7 days from now.

The best time to visit Half Moon is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 82mm per month. By contrast, July can be uncomfortably hot with highs reaching 31°C, while January is the coldest period with lows dropping to 4°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Half Moon 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.