May · Indonesia
Best time to visit Lake Toba in May Weather, crowds & prices
Weather in Lake Toba in May
Average temperature 21°C, 254 mm of rain, about 18 days with 6+ hours of sunshine and 90% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
6.3/10
Ranked #6 of 12 months
- Avg temp
- 21°C
- Rainfall
- 254 mm
- Humidity
- 90%
- Days with 6h+ sun
- 18
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Lake Toba scores 6.3/10 for nature and wildlife travel - an above-average month (#6 of 12). Expect around 21°C, 254 mm of rain, and roughly 18 days with 6+ hours of sunshine this month.
Lake Toba fills a vast volcanic caldera on Sumatra-Batak villages on Samosir Island and misty lakeside viewpoints. Best window: the drier months outside peak monsoon.
May in Lake Toba: mixed conditions, plan around the weather
May averages 21°C (70°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
254 mm of rain puts this in monsoon territory — about 18 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 6.3/10 here, 6th of 12 months, against 6.8/10 in the destination's best month.
Pack light clothing, a hat and real sun protection, a proper rain shell rather than an umbrella, footwear you can get muddy.
Figure on mid-season pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Lake Toba in May?
- In May, Lake Toba averages 21°C, 254 mm of rain, and about 18 days with 6+ hours of sunshine. Its climate-comfort score is 6.3/10.
- Is May a good time to visit Lake Toba?
- May earns a 6.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Lake Toba in May?
- Expect about 254 mm of rain in May. Average humidity is 90% and there are about 18 days with 6+ hours of sunshine.
Curated in Lake Toba
Tickets & experiences
Things to do in Lake Toba
Lake Toba, Indonesia. Live activities and tours from GetYourGuide, matched to this destination.