Daytime highs, nighttime lows and the warmest cities in Guanacaste, Costa Rica this December.
Guanacaste, Costa Rica, a region in Costa Rica, experiences maximum daytime temperatures in December ranging from 28°C (82°F) in Nuevo Arenal to 32°C (90°F) in Nicoya. Nighttime temperatures generally drop to 22°C (72°F) in Nicoya and 20°C (68°F) in Nuevo Arenal.
To get a sense of December's typical temperatures in the key spots of Guanacaste, explore the map below. Click on a point for an in-depth look.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Guanacaste.
Marker color shows the average daytime high temperature in December: blue is cold, red is hot.
Pick a city to see its December weather averages.
Drill down to December weather for any region in Costa Rica.
Average daytime highs in Guanacaste, Costa Rica during December reach about 31°C (88°F) in Tamarindo.
Tamarindo sees nighttime lows close to 24°C (75°F) in December.
According to our recent database analysis, Nicoya is the warmest city. It experiences an average maximum daytime temperature of approximately 32°C (90°F) and rarely drops below 22°C (72°F) during the night.
When looking through our records, we find that Nuevo Arenal stands out as the coolest city in Guanacaste, Costa Rica for the month of December. Daytime highs average 28°C (82°F) and it cools down to about 20°C (68°F) at night.
The weather is predominantly sunny, with an estimated total of around 258 hours of sunshine in Tamarindo. This means many sunny days, which creates a cheerful atmosphere during this month.
We have much more information about the climate in Guanacaste.
Weather and climate has detailed information for every country in the world. Are you going to Costa Rica? Get detailed historical weather averages for many cities in Costa Rica.
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