Concepción, one of Chile's largest cities, sits on the south-central coast of the country near the mouth of the Bío Bío River, on the Pacific at approximately -36.83°S, 73.05°W. It has a warm-summer Mediterranean climate (Köppen Csb) — moderated by the cool Pacific — with mild, dry summers and mild, very wet winters, notably rainier than central Chile further north. Being in the Southern Hemisphere, its seasons are reversed relative to the Northern.

Summer, from December to February, is mild and dry rather than hot, with January and February the warmest months — average highs around 24–25°C — kept comfortable by the cool ocean and afternoon sea breezes. Rain is scarce in these months, skies are often clear, and this dry, pleasant stretch is the sunniest and most settled time of year, ideal for the coast.

Winter, from June to August, is mild but very wet, with July the coolest month — average highs around 13°C and lows near 5–7°C, rarely reaching frost thanks to the ocean's moderating influence. This is the heart of the rainy season, when Pacific storm systems sweep in one after another, bringing frequent, sometimes heavy rain, strong winds and grey skies.

Concepción is quite wet, receiving on the order of 1,100–1,300 mm of rain a year — far more than Santiago — strongly concentrated in the winter months from May to August, while the summer is dry; the wettest months can each exceed 200 mm. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.

Concepción's climate marks the transition from the dry Mediterranean centre of Chile toward the rainy, temperate south, giving it markedly wetter winters than Santiago while keeping the dry summers characteristic of a Mediterranean climate. The cool Pacific and its storms dominate the winter, and the region's coastal, tectonically active setting has historically exposed it to earthquakes and tsunamis alongside its wet, stormy winters.

To follow any single measurement in Concepcion more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.