San Antonio Weather in December

December in San Antonio typically sees daytime highs of 25°C (77°F) and nighttime lows of 16°C (61°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in San Antonio in December

Climate statistics over the past 30 years suggest around 15 days of rain, with 117 mm (4.6 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in San Antonio in December

In December, San Antonio sees high temperatures, with highs of 25°C (77°F). Nights drop to around 16°C (61°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in San Antonio in December

Expect a lot of sunshine this month, with about 244 hours of sun. These sunny conditions add to the overall experience.

If your ideal day consists of dry skies and pleasant temperatures, January, February, March and April typically offer the best circumstances for San Antonio.

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 Antonio's climate page.

San Antonio Temperature in December

Min Temperature 16°C (61°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 51%  

Precipitation 117 mm (4.6 in)  

Rainy days 15 days  

Humidity 74% *  

Sunshine 244 hours *  

Percentage Sunshine *  

* Data from: San José, Costa Rica (12 KM, 7 Miles).

What to Wear in San Antonio in December

For San Antonio 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. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in San Antonio in December

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

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 Antonio's climate page.

More climate data for San Antonio

Temperature Rainfall Sunshine Humidity

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