San José
Costa Rica
Long-term weather forecast
Long-term weather forecast

January 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
January, the same as December, is a moderately hot winter month in San José, Costa Rica, with average temperature varying between 26°C (78.8°F) and 17.8°C (64°F).

Temperature

In San José, Costa Rica, the average high-temperature in January is essentially the same as in December - a still warm 26°C (78.8°F). In San José, in January, the average low-temperature is 17.8°C (64°F).

Rainfall

The month with the least rainfall is January when the rain falls for 1 days and typically collects 6.3mm (0.2") of precipitation.

Daylight

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

Sunshine

The average sunshine in January is 9.2h.

UV index

In January, the average daily maximum UV index in San José is 11. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 11 in January interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for 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.

What is the temperature in January in San José?

In January, in San José, Costa Rica, the average high-temperature is 26°C (78.8°F), and the average low-temperature is 17.8°C (64°F).

How many days does it rain in January in San José?

In San José, Costa Rica, in January, it is raining for 1 days, with typically 6.3mm (0.2") of accumulated precipitation.

What is the driest month in San José?

January is the month with the least rainfall in San José, Costa Rica. Rain falls for 1 days and accumulates 6.3mm (0.2") of precipitation.

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

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

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

In January, the average length of the day is 11.6h.

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

In January, the average sunshine in San José, Costa Rica, is 9.2h.

What is the UV index intensity in January in San José?

The average daily maximum UV index in January is 11. A UV Index reading of 11, and higher, represents an extreme health threat from the exposure to the Sun's UV radiation.
Average temperature in January - San José, Costa Rica
  • Average high temperature in January: 26°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 January: 17.8°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 January - San José, Costa Rica
  • Average rainfall in January: 6.3mm

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 January - San José, Costa Rica
  • Average rainfall days in January: 1 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 January / Average sunshine in January - San José, Costa Rica
  • Average daylight in January: 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 January: 9.2h

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 January - San José, Costa Rica
  • Average UV index in January: 11

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).