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Best Time for the Java's Volcanoes & Temples
Sweet spot: June, July, August — computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
Dry season: Bromo's dawn sea of cloud and Ijen's blue fire hike both need clear pre-dawn skies — this is when they happen.
Rainy season mists the calderas more often than not; Yogyakarta's court culture and batik houses don't mind.
| Month | Temp | Rain | Daylight | |
|---|---|---|---|---|
| January | 21.1–32.1°C | 332 mm | 12.4 h | |
| February | 21.3–30.8°C | 326 mm | 12.3 h | |
| March | 21.4–30.4°C | 243 mm | 12.1 h | |
| April | 21.2–30.4°C | 188 mm | 11.8 h | |
| May | 19.7–30.3°C | 139 mm | 11.6 h | |
| June | 18.9–30.2°C | 88 mm | 11.5 h | |
| July | 17.9–30.4°C | 59 mm | 11.6 h | |
| August | 18.2–31.7°C | 32 mm | 11.7 h | |
| September | 18.2–33.5°C | 50 mm | 12.0 h | |
| October | 20.1–34.7°C | 111 mm | 12.2 h | |
| November | 21.5–34.4°C | 194 mm | 12.4 h | |
| December | 20.7–33.8°C | 274 mm | 12.5 h |