Weather Trends in Santiago, ChileWeather Trends in Santiago,
Chile

Santiago exhibits a distinct Mediterranean climate characterized by warm, arid summers and cool, damp winters. WeatherBox data shows that thermal conditions shift noticeably throughout the year, with a mean seasonal variation of 12.7°C (22.9°F). During the height of the warm season, average daily high temperatures reach 29.0°C (84.2°F), providing significant heat without becoming extreme; statistical analysis indicates that thermometers rarely exceed 31.8°C (89.2°F). Conversely, the cooler months bring a substantial drop in temperature with average daily lows of 3.5°C (38.3°F). Despite the chill, hard freezes are uncommon, as temperatures seldom fall below -0.6°C (30.9°F).

Hydrological patterns are heavily skewed toward specific seasons, creating a sharp contrast between the wet and dry periods of the year. The region receives an annual precipitation total of 495 mm (19 in), with the vast majority falling during the winter. The wettest conditions occur in month June, averaging 105 mm (4 in) of rainfall, coinciding with skies that are overcast approximately 64.3% of the time. This period of seasonal rainfall gives way to distinctively dry summer months, where precipitation becomes negligible. By month February, rainfall averages just 5 mm (0 in), while solar abundance peaks with 385.4 hours of sunshine in month December.

Beyond temperature and precipitation, atmospheric conditions remain relatively stable. Humidity levels are generally moderate, peaking at a monthly mean of 68.1, which prevents the heat from feeling oppressive. Air currents are consistent but gentle, with prevailing winds blowing from the WSW about 32.0% of the year and typical top speeds averaging 6.7 km/h (4.1 mph). Solar intensity is a significant factor during the clear summer months, where the average peak UV Index is 11.9. Dive deeper into these seasonal trends by exploring the comprehensive weather charts on WeatherBox.