San José Temperature by Month
San José, Andalucía, Spain has an average annual maximum temperature of 21°C (70°F), ranging from 16°C (61°F) in January to 28°C (82°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
San José Monthly Temperatures
In San José, temperatures can shift dramatically between warm in summer and mild in winter. Nights follow the same pattern, with lows ranging from 24°C (75°F) in August to 12°C (54°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in San José by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. August, the warmest month, averages 314 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: San José vs Spain
The map below shows the annual temperature across Spain. You can also select individual months if you want to compare a specific time of year.
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San José vs World: Temperature Compared
San José's average annual maximum temperature is 21°C (70°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in San José?
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 José, January is the coolest month, with average highs of 16°C (61°F) and humidity around 67% — considered high. In August, the warmest month, temperatures average 28°C (82°F) with 63% 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 José's weather — including monthly rainfall, sunshine hours, and humidity — visit our San José climate page.
