September · Bolivia
Best time to visit Isla del Sol in September Weather, crowds & prices
Weather in Isla del Sol in September
Average temperature 10°C, 17 mm of rain, about 30 days with 6+ hours of sunshine and 60% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.4/10
Ranked #3 of 12 months
- Avg temp
- 10°C
- Rainfall
- 17 mm
- Humidity
- 60%
- Days with 6h+ sun
- 30
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Isla del Sol scores 9.4/10 for nature and wildlife travel - one of the top 12-month picks (#3). Expect around 10°C, 17 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Isla del Sol is Titicaca’s sacred island of Inca ruins, ridge trails, and wide lake horizons. Best window: the core winter snow season, with shoulder weeks for quieter slopes.
September ranks 3rd of 12 for Isla del Sol — one of the best windows
September averages 10°C (50°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Expect 17 mm of rain — occasional showers rather than washed-out days — alongside about 30 days with 6+ hours of sunshine and 11.9 daylight hours.
A 9.4/10 puts this among the year's best months in Isla del Sol (3rd of 12); only October scores higher, at 9.7/10.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, footwear you can get muddy.
Plan for mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Isla del Sol in September?
- In September, Isla del Sol averages 10°C, 17 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 9.4/10.
- Is September a good time to visit Isla del Sol?
- September earns a 9.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Isla del Sol in September?
- Expect about 17 mm of rain in September. Average humidity is 60% and there are about 30 days with 6+ hours of sunshine.
Curated in Isla del Sol
Tickets & experiences
Things to do in Isla del Sol
Isla del Sol, Bolivia. Live activities and tours from GetYourGuide, matched to this destination.