Chilamate Temperature by Month

Chilamate, Costa Rica has a consistently comfortable climate year-round, with daytime highs averaging 29°C (84°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

With little seasonal fluctuation, Chilamate offers a predictable and steady climate. Maximum daytime temperatures reach a comfortable 30°C (86°F) in September and a comfortable 27°C (81°F) in January. At night, lows range from 21°C (70°F) to 20°C (68°F) throughout the year.

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

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. September, the warmest month, averages 149 hours of sunshine.

The chart below shows the average temperature throughout the year:

Chilamate's average annual maximum temperature is 29°C (84°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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 Chilamate, January is the coolest month, with average highs of 27°C (81°F) and humidity around 68%, considered high. In September, the warmest month, temperatures average 30°C (86°F) with 85% humidity, conditions that feel 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 Chilamate this rarely lasts long on the ground.

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