December weather forecast and climate
San José, Costa Rica

An aerial skyscape of San José, Costa Rica in the evening sun
An aerial skyscape of San José, Costa Rica in the evening sun

Temperature

December is the coldest month, with an average high-temperature of 25.9°C (78.6°F) and an average low-temperature of 18.3°C (64.9°F).

Rainfall

In San José, Costa Rica, during 2 rainfall days, 33.5mm (1.3") of precipitation is typically accumulated. Throughout the year, there are 107 rainfall days, and 1971mm (77.6") of precipitation is accumulated.

Daylight

January and December, with an average of 11.6h of daylight, are months with the shortest days.

Sunshine

The average sunshine in San José is 7.9h.

UV index

December is the month with the lowest UV index, with an average UV index of 10.

What is the coldest month in San José?

December is the coldest month in San José, Costa Rica, with an average high-temperature of 25.9°C (78.6°F) and an average low-temperature of 18.3°C (64.9°F).

What is the temperature in December in San José?

In December, in San José, Costa Rica, the average high-temperature is 25.9°C (78.6°F), and the average low-temperature is 18.3°C (64.9°F).

How much does it rain in San José in December?

In December, in San José, the rain falls for 2 days. Throughout December, 33.5mm (1.3") of precipitation is accumulated.

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

Months with the shortest days in San José, Costa Rica, are January and December, with an average of 11.6h of daylight.

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

In San José, the average length of the day in December is 11.6h.

How long on average sun shines in December in San José?

The average sunshine in December is 7.9h.

When is the lowest UV index in San José?

The month with the lowest UV index is December, with an average UV index of 10.

What is the UV index reading in December in San José?

The average UV index in December in San José, Costa Rica, is 10.
Average temperature in December - San José, Costa Rica
  • Average high temperature in December: 25.9°C

The warmest month (with the highest average high temperature) is April (28.4°C).
The month with the lowest average high temperature is December (25.9°C).

  • Average low temperature in December: 18.3°C

Months with the highest average low temperature are May and July (19°C).
The coldest month (with the lowest average low temperature) is January (17.8°C).

Average rainfall in December - San José, Costa Rica
  • Average rainfall in December: 33.5mm

The wettest month (with the highest rainfall) is September (355.1mm).
The driest month (with the lowest rainfall) is January (6.3mm).

Average rainfall days in December - San José, Costa Rica
  • Average rainfall days in December: 2 days

The month with the highest number of rainy days is September (18 days).
Months with the lowest number of rainy days are January and February (1 days).

Average daylight in December / Average sunshine in December - San José, Costa Rica
  • Average daylight in December: 11.6h

The month with the longest days is June (Average daylight: 12.7h).
Months with shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in December: 7.9h

The month with most sunshine is February (Average sunshine: 9.5h).
The month with least sunshine is June (Average sunshine: 4.8h).

Average UV index in December - San José, Costa Rica
  • Average UV index in December: 10

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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