Climate Insights for Constantia

The climate in Constantia is temperate. The average annual temperature is 17°C and approximately 479mm of precipitation falls per year. June is the wettest month, receiving around 101mm of rainfall. Constantia 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: January, February, December. The coldest months are August, July, June, when temperatures can drop to 10°C.

Constantia sees moderate temperature variation throughout the year, ranging from 10°C to 25°C. January is the warmest month, though highs remain moderate at 25°C with a mean of 21°C. August is the coolest month, with minimum temperatures around 10°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.

Constantia is a relatively dry area, receiving approximately 479mm of precipitation annually, which averages out to around 40mm per month. The wettest month is June, averaging 101mm of rainfall. July and August also tend to see above-average precipitation. The driest month is February, with just 10mm. That's 91mm less than June, 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.

Constantia is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 4km/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 autumn in Constantia, which began on March 20, 2026. Constantia 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 January at around 25°C, while the coldest stretch bottoms out in August near 10°C. Winter is next, beginning on June 21, 2026 — 3 days from now.

The best time to visit Constantia is during January, February, March, April, May, 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 24mm per month. By contrast, August can be quite cold with temperatures dropping to 10°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Constantia 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.