January Weather in Santiago, Costa Rica

Last updated: August 23, 2025

In January, the average temperature in Santiago, Costa Rica hovers around 23°C (74°F). Expect a range from a pleasant 17°C (63°F) to a warm 31°C (87°F). With 28 mm (1.1 in) of precipitation spread over 7 days, the humidity remains relatively high at 68%, adding to the region's unique climate charm.

January Temperature in Santiago

In January in Santiago, the average temperature is 23°C (74°F). Maximum temperatures can reach 31°C (87°F), while minimums can drop to as low as 17°C (63°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

January Weather in Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago, January typically has an average temperature of 23°C (74°F), with highs reaching up to 31°C (87°F) and lows dropping to around 17°C (63°F).

Data source: Temperature data for Santiago generated using information from the Copernicus Climate Change Service.

January Precipitation in Santiago

In Santiago in January, the precipitation amount is 28 mm (1.1 in) over a period of 7 days.

January Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Santiago, January typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Santiago

In Santiago in January, humidity is 68%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making traveling quite uncomfortable if you're not prepared. The air is thick and muggy, leaving you yearning for a cool breeze and frequent breaks in the shade.

January Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Santiago is approximately 68%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Santiago

In Santiago in January, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Santiago.

Maximum UV Index Levels in Santiago for January

The chart shows the monthly maximum UV Index (UVI) for Santiago in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Santiago typically reaches 12, which falls under the extreme exposure category.

Data source: Santiago January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Santiago Compares to Other Months

Weather in Santiago varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Santiago, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Santiago, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	28 mm (1.1 inches)	68%	extreme
February Weather	24°C (76°F)	13 mm (0.5 inches)	68%	extreme
March Weather	25°C (77°F)	18 mm (0.7 inches)	66%	extreme
April Weather	24°C (76°F)	118 mm (4.6 inches)	67%	extreme
May Weather	24°C (75°F)	412 mm (16.2 inches)	69%	extreme
June Weather	24°C (75°F)	397 mm (15.6 inches)	84%	extreme
July Weather	24°C (75°F)	296 mm (11.7 inches)	85%	extreme
August Weather	23°C (74°F)	393 mm (15.5 inches)	82%	extreme
September Weather	23°C (74°F)	461 mm (18.2 inches)	81%	extreme
October Weather	23°C (73°F)	639 mm (25.2 inches)	80%	extreme
November Weather	23°C (74°F)	251 mm (9.9 inches)	80%	extreme
December Weather	23°C (74°F)	72 mm (2.8 inches)	72%	very high