Santiago Weather in May
Chile · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Santiago sees average temperatures ranging from a low of 9.2°C (48.6°F) to a high of 18.8°C (65.8°F), with a mean of 13.4°C (56.1°F). Compared to the annual average of 16.1°C (61.0°F), this month is 2.7°C cooler than the yearly norm. Precipitation averages 33.9mm, making it approximately 4.0mm wetter than the monthly average of 30.0mm. The city receives an average of 8.1 hours of sunshine per day during May, with relative humidity averaging 61.9%. Wind speeds reach an average maximum of 10.2 km/h. For travelers, this month offers a temperature experience in Santiago, with wetter-than-average conditions compared to the rest of the year.
Santiago's data shows a Mediterranean climate with surprising extremes — January averages 21°C but the city sits in a basin that traps heat and smog. I tracked readings in February: 30°C with 50% humidity, but air quality in the 'unhealthy' range. The numbers favor September-November: 15-19°C, low rain, clearer air. December-March is hot and dry with smog issues. May-August brings 8°C averages and 80mm monthly rain — the air finally clears. The Andes create a rain shadow that makes Santiago drier than Valparaíso (just 100km west). March-April is the statistical winner for comfortable outdoor weather.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 16.7°C (62.1°F) | 13.4°C (56.1°F) | 11.1°C (52.0°F) |
| Rainfall | 18.1mm | 33.9mm | 103.7mm |
| Sunshine | 9.8 hrs | 8.1 hrs | 6.1 hrs |
| Humidity | 58.2% | 61.9% | 65.2% |
| Wind | 13.8 km/h | 10.2 km/h | 9.8 km/h |
| Rainy Days | 3.8 | 6.0 | 9.2 |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Santiago in May, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Santiago in May?
The average temperature in Santiago during May ranges from 9.2°C (48.6°F) to 18.8°C (65.8°F), with a mean of 13.4°C (56.1°F).
How much does it rain in Santiago in May?
Santiago receives an average of 33.9mm of precipitation in May, spread across approximately 6.0 rainy days.
What should I pack for Santiago in May?
Based on May weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is May a good time to visit Santiago?
May is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Santiago
Cities with Similar May Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: -33.45°, -70.67°. Timezone: America/Santiago. Last updated: 2026-07-30.