San Fernando Temperature by Month

San Fernando in Valparaíso Region, Chile sees significant seasonal temperature differences, with daytime highs between 15°C (59°F) in July and 30°C (86°F) in January, averaging 22°C (72°F) annually. Explore the full monthly breakdown below.

In San Fernando, temperatures can shift dramatically between warm in summer and mild in winter. Nights follow the same pattern, with lows ranging from 15°C (59°F) in January to 3°C (37°F) in July.

The chart below illustrates the average maximum day and minimum night temperatures in San Fernando by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM. January, the city's warmest month, gets 356 hours of sunshine.

The chart below shows the average temperature throughout the year:

San Fernando's average annual maximum temperature is 22°C (72°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Glasgow, Scotland averages 13°C (55°F) a year, mild but often grey, with cold winters and rarely hot summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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 San Fernando, July is the coolest month, with average highs of 15°C (59°F) and humidity around 90%, considered very high. In January, the warmest month, temperatures average 30°C (86°F) with 65% humidity, conditions that feel 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.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on San Fernando's weather, including monthly rainfall, sunshine hours, and humidity, visit our San Fernando climate page.