San Alfonso Temperature by Month
San Alfonso, Santiago Metropolitan Region, Chile has an average annual maximum temperature of 12°C (54°F), ranging from 2°C (36°F) in July to 20°C (68°F) in January. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
San Alfonso Monthly Temperatures
Depending on the time of the year, temperatures range from pleasant to cold in San Alfonso. Nighttime lows follow the same pattern, ranging from 7°C (45°F) to -7°C (19°F).
The chart below illustrates the average maximum day and minimum night temperatures in San Alfonso by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. January, the warmest month of the year, receives 365 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: San Alfonso vs Chile
The map below shows the annual temperature across Chile. You can also select individual months if you want to compare a specific time of year.
very warm
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San Alfonso vs World: Temperature Compared
San Alfonso's average annual maximum temperature is 12°C (54°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in San Alfonso?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In San Alfonso, July is the coolest month, with average highs of 2°C (36°F) and humidity around 82% — considered very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on San Alfonso's weather — including monthly rainfall, sunshine hours, and humidity — visit our San Alfonso climate page.
