Gunung Arjuna-Lalijiwo Reserve

Nature Reserve

East Java's Gunung Arjuna-Lalijiwo Reserve centers on Mount Arjuno, offering volcanic ridgelines, montane forest and multi-day treks; climbers and local villagers use traditional footpaths to reach sunrise viewpoints.

Gunung Arjuna-Lalijiwo Reserve JakartaTangkuban PrahuSemarangKarimunjawaYogyakartaBorobudurPrambananSoloSurabayaMalangIjenBanyuwangiGunung Arjuna-Lalijiwo Reserve
In this guide

Gunung Arjuna-Lalijiwo Reserve essentials

Country: Indonesia
Driest months: Jul-Sep
Pay in: Rupiah (Rp)
Language: Indonesian
Emergency: 110

Gunung Arjuna-Lalijiwo Reserve at a Glance

Things to Do
When to Go

Best Time to Visit Gunung Arjuna-Lalijiwo Reserve

For hiking and wildlife viewing, go in the dry season (May-September) when trails are driest and conditions are most reliable.

Dry season (trekking season)
May-September · 10-25°C (varies with altitude)
Drier trails and clearer skies - the best time for hiking and wildlife viewing in the highlands.
Wet season
November-March · 15-25°C
Frequent heavy rain makes trails slippery and river crossings more hazardous; access is more difficult.
Shoulder months
April, October · 12-25°C
Transitional periods that can work well if you watch weather windows.

Weather & Climate near Gunung Arjuna-Lalijiwo Reserve

Climate

Gunung Arjuna-Lalijiwo Reserve's climate is classified as Subtropical Highland (Dry Winter) - Subtropical Highland (Dry Winter) climate with consistently warm temperatures year-round. Temperatures range from 9°C to 20°C. Heavy rainfall (2141 mm/year), wettest in March with a pronounced dry season.

Air Quality: AQI 62 Moderate
Best Time to Visit
SeptemberAugustJuly
Temperature & Rainfall
Temperature Range
39°
Warmest Month
17°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Acceptable 11° - 19° 15° 346 mm overcast 87% 2.6 m/s 2.3 extreme 12.4h
February Acceptable 11° - 19° 15° 325 mm overcast 89% 2.3 m/s 2.3 extreme 12.2h
March Acceptable 11° - 20° 15° 348 mm overcast 88% 2.0 m/s 2.3 extreme 12.0h
April Acceptable 11° - 19° 15° 202 mm overcast 86% 2.5 m/s 2.2 extreme 11.8h
May Good 11° - 19° 15° 129 mm partly cloudy 84% 2.0 m/s 1.9 very high 11.7h
June Very Good 10° - 19° 14° 63 mm some cloud 80% 2.5 m/s 1.8 very high 11.6h
July Very Good 10° - 18° 14° 20 mm some cloud 73% 2.4 m/s 1.9 very high 11.6h
August Excellent 9° - 18° 14° 23 mm mostly sunny 64% 2.3 m/s 2.2 extreme 11.8h
September Excellent 10° - 19° 14° 28 mm mostly sunny 58% 3.0 m/s 2.5 extreme 12.0h
October Good 11° - 20° 15° 99 mm partly cloudy 59% 2.5 m/s 2.4 extreme 12.2h
November Acceptable 11° - 20° 16° 229 mm overcast 70% 2.5 m/s 2.3 extreme 12.3h
December Acceptable 11° - 20° 15° 329 mm overcast 83% 1.8 m/s 2.1 extreme 12.4h