San Isidro Weather in December

In San Isidro, December brings high daytime temperatures around 24°C (75°F), with nights cooling to 16°C (61°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in San Isidro in December

As part of the rainy season, San Isidro sees around 16 days of rain in December, with an average of 249 mm (9.8 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.

Temperature in San Isidro in December

In December, San Isidro sees high temperatures, with highs of 24°C (75°F). Nights drop to around 16°C (61°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in San Isidro in December

Enjoy a sunny month with about 249 hours of sunshine, even though this month falls in the wet season. There is still enough sun to enjoy the outdoors.

Should you favor a climate that's both dry and comfortably warm, January, February and March typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
• February
• March
• April

• May
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• December

For a detailed overview over the year and the best time to visit Costa Rica, check out our San Isidro's climate page.

San Isidro Temperature in December

Min Temperature 16°C (61°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 53%  

Precipitation 249 mm (9.8 in)  

Rainy days 16 days  

Humidity 81% *  

Sunshine 249 hours *  

Percentage Sunshine *  

* Data from: Quepos, Costa Rica (50 KM, 31 Miles).

What to Wear in San Isidro in December

For San Isidro in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in San Isidro in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

8/10

Camping

6/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Costa Rica, check out our San Isidro's climate page.

More climate data for San Isidro

Temperature Rainfall Sunshine Humidity

See the full San Isidro climate overview or explore weather in Costa Rica.