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Raung

Mountains

An active stratovolcano on East Java's eastern rim, Raung draws hikers for pre-dawn treks to watch the crater steam and to catch sunrise over nearby volcanic cones and the Java Sea.

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In this guide

Raung essentials

Admission: Free (mountain access)

About Raung

Raung is a large stratovolcano on the eastern side of Java in Indonesia, known for its broad, deep crater and persistent volcanic activity. Its summit rises to about 3,332 metres and is a prominent feature of the surrounding highland landscape.

Hikers and trekkers visit for sunrise views from the crater rim and for highland landscapes that include steep ridges and agricultural terraces below the upper slopes. Treks usually involve an overnight approach from nearby regency towns and require local guides because of steep terrain and changing weather.

Raung has been an active volcano in historic times, with frequent eruptions that produce volcanic ash and occasional larger explosive events. Local authorities monitor activity and issue advisories when ash affects populated areas and aviation.

Geographically the volcano straddles regency boundaries in East Java and dominates the skyline above nearby towns and plantations; access is by roads from regional towns followed by mountain tracks to trailheads.

  • Elevation: Summit elevation is about 3,332 metres, making it one of Java’s higher volcanic peaks.
  • Volcanic activity: Features a large summit crater roughly 1-2 kilometres across and produces frequent ash plumes; eruptions can disrupt air traffic and local agriculture.

Tips for Visiting Raung

  • Start your Raung trek very early (overnight to the upper ridge or pre‑dawn ascent) to reach the rim for sunrise, when weather and visibility are most reliable and clouds often sit below the summit.
  • Hire a local guide and a 4x4 for the approach roads-trailheads and tracks are rough, conditions change quickly, and local operators know the best staging points and current crater‑access restrictions.
  • Check current volcanic alerts and crater access before you go; volcanic gas and ash can close the rim unexpectedly, and local guides will know safe lookout spots that still give dramatic views without lingering in hazardous zones.
When to Go

Best Time to Visit Raung

Aim for the dry season (April-October) for the clearest, safest conditions for hiking and viewing Mount Raung, and check volcanic-status advisories.

Dry season (best for hiking)
Apr-Oct · ~10 to 20 °C (summit cooler)
Drier, clearer conditions that make multi-day hikes and summit approaches more reliable-this is the usual window for trekkers; check trail conditions.
Rainy season (caution)
Nov-Mar · ~15 to 30 °C at low elevations; very wet on routes
Frequent heavy rain, slippery trails and poor visibility; trails are more hazardous and access can be restricted. Also check current volcanic activity before planning a visit.

Weather & Climate near Raung

Climate

Raung's climate is classified as Tundra - Tundra climate with consistently warm temperatures year-round. Temperatures range from 5°C to 14°C. Abundant rainfall (1632 mm/year), wettest in February with a pronounced dry season.

Air Quality: AQI 52 Moderate
Best Time to Visit
SeptemberAugustJune
Temperature & Rainfall
Temperature Range
37°
Warmest Month
14°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor 5° - 14° 8° 266 mm overcast 87% 2.2 m/s 2.5 extreme 12.4h
February Poor 5° - 14° 8° 287 mm overcast 89% 2.3 m/s 2.6 extreme 12.3h
March Poor 5° - 14° 9° 238 mm partly cloudy 88% 2.3 m/s 2.5 extreme 12.0h
April Acceptable 6° - 13° 8° 127 mm partly cloudy 88% 2.5 m/s 2.3 extreme 11.8h
May Good 6° - 14° 8° 98 mm some cloud 87% 2.8 m/s 2.0 very high 11.6h
June Good 5° - 13° 7° 53 mm some cloud 86% 2.9 m/s 1.8 very high 11.5h
July Good 5° - 13° 7° 46 mm some cloud 83% 2.4 m/s 1.9 very high 11.6h
August Good 5° - 13° 7° 33 mm some cloud 77% 3.6 m/s 2.2 extreme 11.7h
September Very Good 5° - 13° 8° 28 mm mostly sunny 70% 3.1 m/s 2.5 extreme 11.9h
October Good 6° - 14° 8° 60 mm some cloud 67% 2.9 m/s 2.6 extreme 12.2h
November Acceptable 6° - 14° 9° 142 mm partly cloudy 73% 2.3 m/s 2.5 extreme 12.4h
December Poor 5° - 14° 8° 254 mm overcast 83% 2.3 m/s 2.3 extreme 12.5h