Region in North Sumatra, Indonesia
Lake Toba weather by month and the best time to visit
When to go to Lake Toba
May–Sep is driest and sunniest; Jul–Aug and Indonesian holidays are busiest. Oct–Dec brings frequent rain and cloudy views; evenings are cool all year.
Lake Toba weather by month
Average daily high, rainfall and conditions.
- Jan25°250 mm
- Feb25°201 mm
- Mar25°281 mm
- Apr26°252 mm
- May25°252 mm
- Jun25°186 mm
- Jul24°247 mm
- Aug24°300 mm
- Sep24°342 mm
- Oct25°415 mm
- Nov24°402 mm
- Dec24°340 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 25°C76°F | 19°C65°F | 250 mm | 90% | Rainy |
| February | 25°C77°F | 19°C66°F | 201 mm | 89% | Rainy |
| March | 25°C78°F | 19°C66°F | 281 mm | 89% | Rainy |
| April | 26°C78°F | 20°C67°F | 252 mm | 90% | Rainy |
| May | 25°C78°F | 19°C67°F | 252 mm | 90% | Rainy |
| June | 25°C76°F | 19°C66°F | 186 mm | 90% | Rainy |
| July | 24°C76°F | 18°C65°F | 247 mm | 90% | Rainy |
| August | 24°C76°F | 18°C65°F | 300 mm | 90% | Very wet |
| September | 24°C76°F | 18°C65°F | 342 mm | 90% | Very wet |
| October | 25°C76°F | 19°C65°F | 415 mm | 91% | Very wet |
| November | 24°C76°F | 19°C66°F | 402 mm | 92% | Very wet |
| December | 24°C76°F | 19°C66°F | 340 mm | 91% | Very wet |
Best months across Indonesia
| Place | Best months | Warmest month |
|---|---|---|
| Bali | May–Sep | Nov (31°C) |
| Ubud | May–Sep | Nov (30°C) |
| Canggu | May–Sep | Nov (31°C) |
| Jakarta | Jun–Sep | Oct (30°C) |
| Seminyak | May–Sep | Nov (31°C) |
| Uluwatu | May–Sep | Apr (28°C) |
| Yogyakarta | May–Sep | Oct (30°C) |
| Gili Islands | May–Oct | Oct (32°C) |
| Nusa Penida | May–Sep | Oct (30°C) |
| Kuta | May–Sep | Nov (31°C) |
| Lombok | May–Sep | Oct (32°C) |
| Labuan Bajo | Apr–Oct | Oct (32°C) |
| Nusa Dua | May–Sep | Apr (29°C) |
| Sanur | May–Sep | Nov (31°C) |
| Raja Ampat | Oct–Apr | Nov (29°C) |
| Mount Bromo | May–Sep | Oct (27°C) |
| Bandung | May–Sep | Oct (28°C) |
| Nusa Lembongan | May–Oct | Oct (30°C) |
| Lake Toba | May–Sep | Apr (26°C) |
| Kuta Lombok | May–Oct | Nov (30°C) |
| Amed | May–Oct | Oct (30°C) |
| Batam | May–Sep | May (30°C) |
| Bintan | May–Sep | May (29°C) |
| Malang | May–Sep | Oct (32°C) |
| Bukit Lawang | Mar–Aug | Apr (30°C) |
| Medan | Feb–Mar, Jun–Aug | May (30°C) |
| Surabaya | May–Oct | Oct (36°C) |
| Manado | May–Oct | Oct (30°C) |
| Tana Toraja | Jun–Sep | Oct (26°C) |
| Jimbaran | May–Sep | Apr (28°C) |
Quick answers
What is the best month to visit Lake Toba?
May–Sep. May–Sep is driest and sunniest; Jul–Aug and Indonesian holidays are busiest. Oct–Dec brings frequent rain and cloudy views; evenings are cool all year.
When is the rainy season in Lake Toba?
Rain peaks in October with about 415 mm. Months with 150 mm or more: All year.
What is the hottest month in Lake Toba?
April, with average highs of 26°C (78°F).
How cold does Lake Toba get?
The coolest nights are in July, averaging 18°C (65°F).
More about Lake Toba
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Sources
- NASA POWER climatology (2001–2020)
- Wonderful Indonesia (Ministry of Tourism)
- InJourney Airports (Indonesian airports)
- Siloam Hospitals
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 1.7°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.