Cartagena Temperature by Month
Cartagena in Valparaíso Region, Chile enjoys a stable climate, with daytime temperatures staying close to 18°C (64°F) throughout the year. Explore the full monthly breakdown below.
Cartagena Monthly Temperatures
With little seasonal fluctuation, Cartagena offers a predictable and steady climate. Maximum daytime temperatures reach a pleasant 21°C (70°F) in January and a moderate 15°C (59°F) in July. At night, lows range from 14°C (57°F) to 7°C (45°F) throughout the year.
The chart below illustrates the average maximum day and minimum night temperatures in Cartagena by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. January, the city's warmest month, averages 280 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Cartagena 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.
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Cartagena vs World: Temperature Compared
Cartagena's average annual maximum temperature is 18°C (64°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation — summers are often cool and foggy, winters mild.
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 Cartagena?
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 Cartagena, July is the coolest month, with average highs of 15°C (59°F) and humidity around 80% — 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.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Cartagena this rarely lasts long on the ground.
For more on Cartagena's weather — including monthly rainfall, sunshine hours, and humidity — visit our Cartagena climate page.
