December weather forecast
San José, Costa Rica

Skyscape of San José, Costa Rica in the evening sun
Skyscape of San José, Costa Rica in the evening sun

Weather in December

December, the first month of the winter in San José, is a moderately hot month, with temperature in the range of an average low of 14°C (57.2°F) and an average high of 23.4°C (74.1°F).

Temperature

In December, the average high-temperature is practically the same as in November - a moderately hot 23.4°C (74.1°F). The average low-temperature, in December, is 14°C (57.2°F).

Humidity

In San José, the average relative humidity in December is 84%.

Rainfall

In San José, in December, during 19.5 rainfall days, 65mm (2.56") of precipitation is typically accumulated. In San José, during the entire year, the rain falls for 287.8 days and collects up to 2585mm (101.77") of precipitation.

Daylight

With an average of 11h and 34min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 05:37 and sunset at 17:13. On the last day of December, sunrise is at 05:52 and sunset at 17:26 CST.

Sunshine

The average sunshine in December in San José is 7.8h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 5. The months with the lowest UV index in San José are January through December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
[Resources]

FAQ

What is the temperature in December in San José?

In San José, in December, the average high-temperature is 23.4°C (74.1°F), and the average low-temperature is 14°C (57.2°F).

What is the average humidity in December in San José?

In December, the average relative humidity in San José is 84%.

How much does it rain in San José in December?

In San José, Costa Rica, in December, it is raining for 19.5 days, with typically 65mm (2.56") of accumulated precipitation.

What is the month with the shortest days in San José?

With an average of 11h and 34min of daylight, December has the shortest days of the year in San José.

What is the average length of the day in December in San José?

In San José, the average day length in December is 11h and 34min.

When are sunrise and sunset in December in San José?

In December, on the first day of the month, sunrise is at 05:37 and sunset at 17:13. On the last day of the month, in San José, Costa Rica, sunrise is at 05:52 and sunset at 17:26 CST.

How many hours of sunshine does San José have in December?

The average sunshine duration in December in San José, Costa Rica, is 7.8h.

What is the month with the highest UV index in San José?

The months with the highest UV index in San José, Costa Rica, are January through December, with an average maximum UV index of 5.

What is the month with the lowest UV index in San José?

January through December, with an average maximum UV index of 5, are months with the lowest UV index in San José.

How high is the UV index in December in San José?

In December, the average daily maximum UV index in San José, Costa Rica, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Average temperature in December
San José, Costa Rica

Average temperature in December - San José, Costa Rica
  • Average high temperature in December: 23.4°C

The warmest month (with the highest average high temperature) is April (26°C).
The month with the lowest average high temperature is October (22.4°C).

  • Average low temperature in December: 14°C

The month with the highest average low temperature is June (17°C).
The coldest month (with the lowest average low temperature) is January (13.8°C).

[Resources]

Average pressure in December
San José, Costa Rica

Average pressure in December - San José, Costa Rica
  • Average pressure in December: 1011.7mbar

The month with the highest atmospheric pressure is January (1012.3mbar).
The month with the lowest atmospheric pressure is October (1010.8mbar).

[Resources]

Average wind speed in December
San José, Costa Rica

Average wind speed in December - San José, Costa Rica
  • Average wind speed in December: 9km/h

The windiest month (with the highest average wind speed) is February (10.7km/h).
The calmest month (with the lowest average wind speed) is September (4.3km/h).

[Resources]

Average humidity in December
San José, Costa Rica

Average humidity in December - San José, Costa Rica
  • Average humidity in December: 84%

The months with the highest relative humidity are September and October (91%).
The months with the lowest relative humidity are February and March (75%).

[Resources]

Average rainfall in December
San José, Costa Rica

Average rainfall in December - San José, Costa Rica
  • Average rainfall in December: 65mm

The wettest month (with the highest rainfall) is October (438mm).
The driest month (with the least rainfall) is February (26mm).

[Resources]

Average rainfall days in December
San José, Costa Rica

Average rainfall days in December - San José, Costa Rica
  • Average rainfall days in December: 19.5 days

The month with the highest number of rainy days is October (30.5 days).
The month with the least rainy days is February (12.2 days).

[Resources]

Average daylight in December /
Average sunshine in December
San José, Costa Rica

Average daylight in December / Average sunshine in December - San José, Costa Rica
  • Average daylight in December: 11h and 34min

The month with the longest days is June (Average daylight: 12h and 42min).
The month with the shortest days is December (Average daylight: 11h and 34min).

  • Average sunshine in December: 7h and 48min

The month with the most sunshine is February (Average sunshine: 9h and 12min).
The month with the least sunshine is October (Average sunshine: 5h and 48min).

[Resources]

Average sunshine days in December
San José, Costa Rica

Average sunshine days in December - San José, Costa Rica
  • Average sunshine days in December: 9.1 days

The month with the most sunshine days is March (13.5 days).
The month with the least sunshine days is September (0.1 days).

[Resources]

Average UV index in December
San José, Costa Rica

Average UV index in December - San José, Costa Rica
  • Average UV index in December: 5

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 5).

[Resources]

Average cloud cover in December
San José, Costa Rica

Average cloud cover in December - San José, Costa Rica
  • Average cloud cover in December: 45

The month with the most cloud cover is October (Cloud cover 68).
The month with the least cloud cover is February (Cloud cover 30).

[Resources]

Average visibility in December
San José, Costa Rica

Average visibility in December - San José, Costa Rica
  • Average visibility in December: 8km

The months with the highest visibility are January, February and March (9km).
The months with the lowest visibility are August, September, October and November (6km).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location