January Weather in Santiago, Costa Rica

Last updated: August 23, 2025

In Santiago, Costa Rica during January, the average temperature hovers around 21°C (71°F), with a comfortable range from a minimum of 15°C (60°F) to a maximum of 28°C (82°F). Expect 116 mm (4.6 in) of precipitation spread over 19 days, contributing to a humidity level of 68%. This blend of warmth and moisture creates a vibrant atmosphere perfect for exploring the area!

January Temperature in Santiago

In January in Santiago, the average temperature is 21°C (71°F). The maximum can reach 28°C (82°F), and the minimum can be as low as 15°C (60°F). This pleasant weather makes it an ideal time for travelers to explore and enjoy outdoor activities in Santiago.

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 21°C (71°F), with highs reaching up to 28°C (82°F) and lows dropping to around 15°C (60°F).

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

January Precipitation in Santiago

In Santiago in January, precipitation amounts to 116 mm (4.6 in) over the course of 19 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 116 mm (4.6 inches) of precipitation spread over approximately 19 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 21°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting for leisurely strolls and outdoor adventures.

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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, 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	21°C (71°F)	116 mm (4.6 inches)	68%	extreme
February Weather	22°C (71°F)	65 mm (2.5 inches)	68%	extreme
March Weather	22°C (72°F)	74 mm (2.9 inches)	66%	extreme
April Weather	22°C (72°F)	253 mm (10.0 inches)	67%	extreme
May Weather	22°C (72°F)	706 mm (27.8 inches)	69%	extreme
June Weather	22°C (72°F)	651 mm (25.6 inches)	84%	extreme
July Weather	22°C (72°F)	682 mm (26.9 inches)	85%	extreme
August Weather	22°C (71°F)	762 mm (30.0 inches)	82%	extreme
September Weather	21°C (71°F)	853 mm (33.6 inches)	81%	extreme
October Weather	21°C (70°F)	873 mm (34.4 inches)	80%	extreme
November Weather	21°C (71°F)	503 mm (19.8 inches)	80%	extreme
December Weather	21°C (71°F)	253 mm (10.0 inches)	72%	very high