SeasonMapLake Toba (Toba) weather in May
Indonesia
May in Lake Toba: hot, soaked, with clean air — a gamble, with 28 rainy days.
#8 of 12 months in Lake Toba · #1124 of 1383 destinations to visit in May · comfort 62/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Lake Toba in May
Other months in Lake Toba
Lake Toba's forum notes February sits within the wet season, though 'wet season' doesn't mean rain all day — the typical pattern is an intense shower in the late afternoon or overnight, with clear mornings common. Regulars describe rainfall as highly variable year to year in February, and put daytime temperatures around 25-27°C with nights cooling to the low 20s°C.
Add your own note from Lake Toba's card on the map.
Lake Toba climate normals — May
| Daytime high | 26°C / 80°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 31°C / 88°F | |
| Rainfall | 250 mm / 9.9 in | ⛈ soaked |
| Rainy days | 28 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 8.4 h/day | |
| Daylight | 12.2 h | |
| Wind | 6 km/h / 4 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Lake Toba in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Lake Toba's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherLake Toba's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Lake Toba in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Wet season
MonsoonRisk28 rainy days and about 250 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Where is Lake Toba?
Lake Toba in May — FAQ
- Is May a good time to visit Lake Toba?
- May in Lake Toba: hot, soaked, with clean air — a gamble, with 28 rainy days. It ranks #8 of 12 months for Lake Toba on SeasonMap's comfort score (62/100).
- What is the weather like in Lake Toba in May?
- In May, Lake Toba averages a daily high of 26.4°C and a low of 22.1°C, with about 250.3 mm of rain over roughly 28.3 rainy days.
- What is the air quality in Lake Toba in May?
- Lake Toba has a mean US Air Quality Index of about 41 in May.