Climate Insights for Assumption Island Airport

The climate in Assumption Island Airport is hot. The average annual temperature is 26°C and approximately 905mm of precipitation falls per year. April is the wettest month, receiving around 167mm of rainfall. Assumption Island Airport sits near the equator, so seasonal temperature differences are minimal throughout the year.

Assumption Island Airport has relatively stable temperatures year-round, staying within a 4°C range. The warmest month is March, when average highs reach 28°C and the mean temperature sits around 28°C. August is the coolest month, with minimum temperatures around 24°C and an average of 24°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.

Assumption Island Airport is a moderately rainy area, receiving approximately 905mm of precipitation annually, which averages out to around 75mm per month. The wettest month is April, averaging 167mm of rainfall. February and January also tend to see above-average precipitation. The driest month is September, with just 13mm. That's 154mm less than April, 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.

Assumption Island Airport is moderately windy, with an average annual wind speed of 29km/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 38km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in February, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 19km/h gap 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 35km/h in winter, 33km/h in spring, 21km/h in summer, 27km/h in autumn.

It is currently autumn in Assumption Island Airport, which began on March 20, 2026. Assumption Island Airport sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in March at around 28°C, while the coldest stretch bottoms out in August near 24°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Assumption Island Airport is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 17mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 28°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Assumption Island 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.