Santiago, Chile Weather
Santiago hourly forecast: next 24 hours
Today's high of 74°F (24°C) is about 9°F (5°C) above the typical September high of 65°F (19°C).
Current conditions in detail
Santiago weather tomorrow (Wednesday, September 16)
Tomorrow in Santiago looks smoky haze, with a high of 70° and an overnight low of 60°. Rain is unlikely (8% chance). Winds top out near 5 mph, and the UV index reaches 6 (high).
Santiago 14-day forecast
About the weather in Santiago
Santiago runs on a dry-summer rhythm: the warmest months are also the driest. March averages 3 mm (0.1 in) while the wet season peaks in June at 3.1 inches (79 mm). Highs range from 59°F (15°C) to 85°F (30°C).
Santiago weather: quick facts
- Hottest month: January - highs near 85°F (30°C)
- Coldest month: July - highs near 59°F (15°C)
- Decade extremes (2015-2024): 99°F (37°C) high · 15°F (-9°C) low
- Wettest month: June (6 rainy days) · Sunniest: December (13.5 h sun/day)
- Climate type: semi-arid
- Annual swing: 12°C between the average warmest and coolest month · day to night: 12°C
- Average humidity: 59%
Temperatures through the year
Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is September through November. Warmth peaks in January: highs of 85°F (30°C), lows of 60°F (16°C). July is the coolest month, with highs of 59°F (15°C) and lows near 43°F (6°C). The gridded 2015-2024 daily record for this location tops out at 99°F (37°C) and bottoms at 15°F (-9°C) - decade extremes, not all-time station records. 5 months average under 20 mm of rain, the longest unbroken stretch running November through March.
Rain, sun and snow
The wettest month is June (3.1 inches (79 mm) across 6 days) and the driest March. Relative humidity averages 59% across the year, drier than about 86% of the cities we track.
Season by season
Spring (September through November)
Through spring, Santiago is mild and warm: 71°F (22°C) by day, 50°F (10°C) after dark, and rain comes on about 13 days over the three months. Daylight is generous - around 10.8 hours of sun a day.
Summer (December through February)
Summer brings hot afternoons here - highs near 84°F (29°C), nights near 59°F (15°C), and precipitation is sparse, near 20 mm (0.8 in) for the season. Daylight is generous - around 13.2 hours of sun a day.
Fall (March through May)
Fall in Santiago settles into easy warmth, with daytime highs averaging 74°F (23°C) and nights around 53°F (12°C); precipitation is sparse, near 2.8 inches (72 mm) for the season.
Winter (June through August)
Through winter, Santiago runs cool rather than cold: 60°F (16°C) by day, 44°F (6°C) after dark, and rain comes on about 18 days over the three months.
Average temperatures in Santiago by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 85° | 60° | 0 | 0.3 in | 13.4 h/day | 51% |
| February | 85° | 61° | 1 | 0.2 in | 12.7 h/day | 53% |
| March | 82° | 58° | 1 | 0.1 in | 11.6 h/day | 53% |
| April | 74° | 53° | 2 | 1.3 in | 9.7 h/day | 60% |
| May | 66° | 48° | 4 | 1.4 in | 8.0 h/day | 62% |
| June | 60° | 44° | 6 | 3.1 in | 6.8 h/day | 62% |
| July | 59° | 43° | 5 | 2.2 in | 7.6 h/day | 63% |
| August | 62° | 44° | 6 | 2.6 in | 8.4 h/day | 68% |
| September | 65° | 46° | 6 | 1.6 in | 9.2 h/day | 69% |
| October | 71° | 49° | 5 | 1.4 in | 11.0 h/day | 64% |
| November | 78° | 53° | 2 | 0.5 in | 12.3 h/day | 55% |
| December | 83° | 57° | 1 | 0.3 in | 13.5 h/day | 51% |