Climate Insights for Saint Helena Airport

The climate in Saint Helena Airport is warm and mild. The average annual temperature is 22°C and approximately 46mm of precipitation falls per year. March is the wettest month, receiving around 7mm of rainfall. Saint Helena Airport 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: March, February, April. The coldest months are September, October, August, when temperatures can drop to 19°C.

Saint Helena Airport has relatively stable temperatures year-round, staying within a 6°C range. March is the warmest month, though highs remain moderate at 25°C with a mean of 24°C. September is the coolest month, with minimum temperatures around 19°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.

Saint Helena Airport is a quite dry location, receiving approximately 46mm of precipitation annually, which averages out to around 4mm per month. The wettest month is March, averaging 7mm of rainfall. July and April also tend to see above-average precipitation. The driest month is October, with just 1mm. 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.

Saint Helena Airport is moderately windy, with an average annual wind speed of 30km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 33km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in January, with average winds dropping to 26km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 7km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 32km/h in winter, 31km/h in spring, 28km/h in summer, 28km/h in autumn.

It is currently autumn in Saint Helena Airport, which began on March 20, 2026. Saint Helena Airport 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 March at around 25°C, while the coldest stretch bottoms out in September near 19°C. Winter is next, beginning on June 21, 2026 — 90 days from now.

The best time to visit Saint Helena Airport is during January, February, March, April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 4mm per month. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Saint Helena Airport 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.