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October Weather in Santiago, Costa Rica

Last updated: August 23, 2025

In Santiago, Costa Rica, the average temperature in October is a pleasant 23°C (73°F). During this time, you can expect temperatures to range from a minimum of 18°C (66°F) to a maximum of 29°C (84°F). With an average precipitation of 639 mm (25.2 in) spread over 30 days, and a humidity level hovering around 80%, it's wise to prepare for both warmth and the occasional shower.

October Temperature in Santiago

In October in Santiago, the average temperature is 23°C (73°F), with maximums reaching 29°C (84°F) and minimums dropping to as low as 18°C (66°F). This pleasant climate makes it an ideal destination for travelers seeking comfortable weather.

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

The chart illustrates October 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, October typically has an average temperature of 23°C (73°F), with highs reaching up to 29°C (84°F) and lows dropping to around 18°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec747576767575757473737374
Data source: Temperature data for Santiago 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.

October Precipitation in Santiago

In Santiago in October, the total precipitation amount is 639 mm (25.2 in) over the course of 30 days.

October Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Santiago, October typically receives around 639 mm (25.2 inches) of precipitation spread over approximately 30 days.
JanFebMarAprMayJunJulAugSepOctNovDec28131811841239729739346163925172
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Santiago

In Santiago in October humidity is 80%. With an average temperature of 23°C (73°F), this humidity feels like a warm blanket enveloping you, making outdoor activities slightly sticky and requiring frequent breaks in shaded areas to stay comfortable while exploring.

October Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Santiago is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Santiago

In Santiago in October, 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 Santiago, you can check here.

Maximum UV Index Levels in Santiago for October

The chart shows the monthly maximum UV Index (UVI) for Santiago in October, 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 October, the maximum UV index in Santiago typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121315151414141313141210
Data source: Santiago October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)28 mm (1.1 inches)68%extreme
February Weather24°C (76°F)13 mm (0.5 inches)68%extreme
March Weather25°C (77°F)18 mm (0.7 inches)66%extreme
April Weather24°C (76°F)118 mm (4.6 inches)67%extreme
May Weather24°C (75°F)412 mm (16.2 inches)69%extreme
June Weather24°C (75°F)397 mm (15.6 inches)84%extreme
July Weather24°C (75°F)296 mm (11.7 inches)85%extreme
August Weather23°C (74°F)393 mm (15.5 inches)82%extreme
September Weather23°C (74°F)461 mm (18.2 inches)81%extreme
October Weather23°C (73°F)639 mm (25.2 inches)80%extreme
November Weather23°C (74°F)251 mm (9.9 inches)80%extreme
December Weather23°C (74°F)72 mm (2.8 inches)72%very high

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