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January Weather in San Antonio, Chile

Last updated: August 22, 2025

In January, the average temperature in San Antonio, Chile is a comfortable 17°C (62°F), with the minimum dipping to 10°C (50°F) and the maximum rising to 26°C (80°F). You'll find the weather quite dry, with only 6 mm (0.2 in) of precipitation over 0 days, and the average humidity sits at a pleasant 41%.

January Temperature in San Antonio

In January in San Antonio, the average temperature is 17°C (62°F). Maximum temperatures can reach 26°C (80°F), while minimums can drop as low as 10°C (50°F). This mild climate makes it an ideal destination for travelers seeking comfortable weather for outdoor activities.

January Weather in San Antonio: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, January typically has an average temperature of 17°C (62°F), with highs reaching up to 26°C (80°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec626260575451505053555960
Data source: Temperature data for San Antonio generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in San Antonio

In San Antonio in January, the total precipitation amount is 6 mm (0.2 in), spread over a duration of 0 days.

January Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 San Antonio, January typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec6339431074738161431
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in San Antonio

In San Antonio in January humidity is 41%. With an average temperature of 17°C (62°F), this humidity feels like a fresh, invigorating breeze that makes exploring the area comfortable and enjoyable for travelers.

January Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, 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 San Antonio is approximately 41%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec41%41%46%52%64%71%75%73%56%61%52%39%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in San Antonio

In San Antonio in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Antonio, you can check here.

Maximum UV Index Levels in San Antonio for January

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 San Antonio typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311853468111314
Data source: San Antonio 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 San Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (62°F)6 mm (0.2 inches)41%extreme
February Weather17°C (62°F)3 mm (0.1 inches)41%extreme
March Weather16°C (60°F)3 mm (0.1 inches)46%extreme
April Weather14°C (57°F)9 mm (0.4 inches)52%very high
May Weather12°C (54°F)43 mm (1.7 inches)64%moderate
June Weather11°C (51°F)107 mm (4.2 inches)71%moderate
July Weather10°C (50°F)47 mm (1.9 inches)75%moderate
August Weather10°C (51°F)38 mm (1.5 inches)73%high
September Weather11°C (53°F)16 mm (0.6 inches)56%very high
October Weather13°C (55°F)14 mm (0.6 inches)61%extreme
November Weather15°C (59°F)3 mm (0.1 inches)52%extreme
December Weather16°C (61°F)1 mm (0.0 inches)39%extreme

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