Climate in Cocos Islands

The climate of Cocos Islands is straightforward to summarise because the territory is compact and the weather does not vary from place to place. Conditions in one street match those a short walk away. The figures that follow describe the climate as a whole, for a brief visit or a longer stay. Expect the year to run from around -62°C at the cool end to -54°C when it is warmest. Those figures mark the usual seasonal contrast rather than a daily swing. Most months fall comfortably inside this range. Rainfall totals around 16mm a year. That annual figure is a useful guide to how wet a stay is likely to feel, though individual months can be wetter or drier than the average implies. A waterproof still earns its place in most bags. No single season dominates the rainfall record. Totals from one part of the year to the next remain fairly comparable, which keeps conditions even. Travellers need not time a visit around a dry season that never really arrives.

December is the hottest month, with daytime highs around -54°C. Afternoons are typically the warmest part of the day, while mornings start cooler. Travellers visiting then can expect the year's most favourable temperatures for being outside. The lowest temperatures of the year occur in January, when overnight figures fall to around -62°C. Mornings can feel particularly cold until the sun is up. Extra layers are the main adjustment for a visit in this month. The climate's annual mean is approximately -58°C. That single number conceals the swing from the coldest month to the hottest. It remains a useful headline for how warm the territory is overall.

The rainfall peak usually falls in December. Wet days are more frequent then, and totals for the month stand above the rest of the calendar. A visit at this time is still feasible, but an umbrella and spare shoes earn their keep. January and the surrounding months are usually the driest. Rain is less frequent then, though it is seldom absent altogether. Travellers looking for the most favourable window for outdoor plans often choose this part of the year. Winter snowfall averages around 17cm. Some years come in below that figure and some above, but snow is a genuine part of the cold season. Travellers visiting in winter should allow for icy pavements after a fall.