Weather in Кастро: What to Expect by Season

Кастро sits on the eastern shore of Chiloé Island, where the climate is oceanic and mild year-round. Summers here are cool and relatively dry, while winters bring more rain and chilly winds. The transition months—March, April, September, and October—offer a mix of conditions, with temperatures gradually shifting between the extremes of the seasons.

Travelers to Кастро will find that the weather rarely reaches extremes, but the difference between the warmest and coolest months is noticeable. January and February are the sunniest, with long daylight hours, while June and July are the wettest and darkest. Even in the rainier months, the city’s lush landscapes and coastal charm remain appealing.

In Кастро, temperatures stay moderate throughout the year, though the seasonal swing is distinct. The warmest months, January and February, see average highs of +20.5 °C and +20.8 °C, while nights cool to around +9 °C. By March, the air begins to chill, and by June, average highs drop to +10.8 °C, with lows near +3.5 °C.

The coldest period in Кастро spans June to August, when daytime temperatures hover around +10 °C to +11 °C, and nights can feel crisp. From September, the weather slowly warms, with November and December bringing more comfortable conditions, though still cool compared to summer. The ocean tempers the climate, preventing sharp spikes or drops in temperature.

Rain is a defining feature of Кастро’s climate, especially from May to August, when monthly rainfall exceeds 130 mm. June is the wettest month, with an average of 169.4 mm, while January and February are the driest, with around 40 mm each. Even in the drier months, brief showers are common, so waterproof layers are always useful.

The rain in Кастро is persistent rather than torrential, often arriving as steady drizzle or light showers. September and October mark the transition out of the wet season, with rainfall decreasing to around 80–90 mm. If you prefer drier conditions, January and February are the best months to visit, though even then, an umbrella or rain jacket is a wise addition to your bag.

For a trip to Кастро in January or February, pack light layers for daytime, such as breathable shirts and a light sweater, along with a waterproof jacket for occasional rain. Evenings can be cool, so a warmer layer is helpful. Comfortable walking shoes are a must for exploring the city’s wooden churches and coastal paths.

From May to August, Кастро’s weather demands warmer clothing. A waterproof coat, thermal layers, and sturdy footwear will keep you comfortable during the rainier months. A hat and gloves may be useful for chilly mornings, especially if you plan to spend time outdoors. Don’t forget a compact umbrella—it’s a year-round essential here.

In the shoulder seasons, March to April and September to November, Кастро’s weather is unpredictable. Pack a mix of light and warm layers, along with a waterproof outer layer. A scarf and gloves can be handy for cooler days, while sunglasses and sunscreen are useful during the brighter months, even when temperatures are mild.