Lake Toba (Toba) weather in June

June in Lake Toba: hot, soaked, with clean air — fine if you can take 25 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Lake Toba🇮🇩 Indonesia · Malaysia, Singapore & Sumatra · Trekking66
  1. 65Jan
  2. 70Feb
  3. 66Mar
  4. 62Apr
  5. 62May
  6. 66Jun
  7. 71Jul
  8. 64Aug
  9. 61Sep
  10. 59Oct
  11. 56Nov
  12. 58Dec

#4 of 12 months in Lake Toba · #1039 of 1413 destinations to visit in June · comfort 66/100 (tier C)

Days
27°C
Nights
22°C
Wet days
25
Sun
9.3 h
Humidity
82%
Daylight
12 h
Lake Toba, Indonesia
Photo: Rudi Chandra · Pexels

Traveller notes on Lake Toba in June

Other months in Lake Toba

Lake Toba-forum threads on a May visit describe this as genuinely a good stretch, posters naming May through August as the broader recommended window with cooler evenings than the hottest months. Regulars call three to four days at Tuk Tuk on Samosir Island genuinely standard, several posters naming Carolina, Bagus Bay and Samosir Cottages as reliable places to stay. Posters call combining a Toba trip with Berastagi genuinely a popular route, several regulars naming the Sibayak and Sinabung volcanoes alongside real hot springs as reasons to add the stop. Regulars call Sipiso-piso waterfall a real worthwhile detour en route, several threads naming this easy to combine with the wider itinerary. Posters recommend building in real time for both the lake and Berastagi rather than rushing, several regulars calling this standard given how much there is to see. The record: 26.4C days, 22.1C nights, an extraordinarily high 250.3mm across over 28 days and 85 percent humidity.
LakeTobaMayRegular · May · 1 month ago · Read more on tripadvisor.co.nz ↗
Lake Toba-forum threads on a September visit describe a slower twelve-day loop through Medan, Berastagi and Lake Toba as a real way to properly see the region, several posters planning exactly this kind of extended itinerary. Regulars recommend three to four days at the lake itself as a reasonable minimum to make the trip worthwhile, shorter stops considered rushed by several regulars. Posters call Samosir Island a genuine highlight within the wider lake, several threads discussing transportation and itinerary planning specifically for reaching it. Regulars call the drive or ferry connection from Medan a real logistics factor worth planning ahead, several posters asking about current options before finalizing dates. Posters recommend real waterproof layers regardless of a clear morning, September conditions here shifting fast given the season. The record: 25.9C days feeling like 28C, 21.3C nights, an extraordinarily high 285.2mm across 28 days and 84 percent humidity.
LakeTobaSeptemberRegular · September · 1 month ago · Read more on Tripadvisor ↗
Lake Toba-forum threads on how rainy late January runs describe this as genuinely within the wetter stretch, posters calling September through January the period of higher rainfall regionally. Regulars call the typical pattern an intense late-afternoon or overnight shower rather than all-day rain, some days passing with nothing at all. Posters describe one long-resident's account of early January as genuinely the worst stretch, persistent drizzle and cold for days straight, while a later system dropping real volume was barely noticed since it arrived in the evening and cleared by morning. Regulars call daytime temperatures reliably warm regardless of the pattern, dropping only modestly overnight. Posters recommend a longer local forecast rather than a single day's reading. Regulars call the lake worth visiting regardless of the wetter season's reputation. The record: 24.7C days feeling like 29C, 20.7C nights, an extraordinarily high 256.8mm across over 27 days and 87 percent humidity.
LakeTobaJanuaryRegular · January · 1 month ago · Read more on Tripadvisor ↗
Lake Toba-forum threads on March conditions describe this as a genuine transition month, posters calling the wet season technically still active but noticeably easing compared with the heavier months just prior. Regulars describe the typical pattern as an intense afternoon or overnight shower rather than an all-day soak, mornings on Samosir Island often clear and pleasant. Posters recommend a flexible daily plan given how quickly conditions can shift, boat crossings occasionally suspended during a system. Regulars call the lake's cooler air a real relief against the tropical heat. Posters describe Tuk Tuk as the standard base for exploring Samosir, warm swimming water a genuine highlight regardless of weather. Regulars recommend packing a light rain shell rather than assuming clear skies hold all day. The record: 25.7C days feeling like 30C, 21.4C nights, an extraordinarily high 224mm across nearly 27 days and 85 percent humidity.
LakeTobaMarchRegular · March · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Lake Toba's card on the map.

Lake Toba climate normals — June

Daytime high27°C / 80°F🥵 hot
Nighttime low22°C / 71°F
Feels like (high)31°C / 88°F
Rainfall226 mm / 8.9 in⛈ soaked
Rainy days25 days
Humidity82%💦 very humid
Dew point20°C / 68°F
Sunshine9.3 h/day
Daylight12.3 h
Wind6 km/h / 4 mph
Air quality (US AQI)40🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Lake Toba in June

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.

Peak crowdsFestival Danau Toba, Mid-year break in Indonesia, school holidays in 3 of the markets that fill it(estimated)

JFMAMJJASOND

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.

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What's on in Lake Toba in June

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Festival

    Festival Danau Toba

    1 Jun – 30 Sep · usuallyMajor festivalCrowded

    The regional government's flagship week of Batak music, canoe racing and dance, usually held on Samosir in the dry half of the year. The dates move and have been postponed more than once. Source ↗

  • Season

    Dry season

    1 Jun – 30 Sep · usually

    The clearest air and the flattest water of the year, when the far wall of the caldera is visible from Tuk Tuk all day. Nights on the lake stay cool enough for a blanket.

  • Season

    Wet season

    MonsoonRisk

    25 rainy days and about 226 mm in the month — the real kind of rainy season, not afternoon showers.

    from the climate normals

What's on around the world in June →

Where is Lake Toba?

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Lake Toba in June — FAQ

Is June a good time to visit Lake Toba?
June in Lake Toba: hot, soaked, with clean air — fine if you can take 25 rainy days. It ranks #4 of 12 months for Lake Toba on SeasonMap's comfort score (66/100).
What is the weather like in Lake Toba in June?
In June, Lake Toba averages a daily high of 26.6°C and a low of 21.8°C, with about 225.9 mm of rain over roughly 24.9 rainy days.
What is the air quality in Lake Toba in June?
Lake Toba has a mean US Air Quality Index of about 40 in June.