December in Bali: what the weather really brings

December wraps Bali in warm, saturated humidity. Daytime highs sit around 19.8°C (67.6°F), while nights cool to 14.5°C (58.1°F)—warm enough that you'll shed layers by mid-morning, but cool enough to need a light jacket at dawn or after sunset. The real story is rainfall: expect 338.3mm spread across roughly 29.6 days, which means afternoon downpours are almost routine. When the sun breaks through, you get about 8.9 hours of it per day, often in the early morning before clouds gather. The air feels thick and breathing-heavy, especially in the rice terraces and forested valleys.

December is Bali's low season, which means emptier temples, shorter queues at warungs, and hotel rates that drop noticeably. The monsoon is underway, so you'll see locals moving faster between shelters, farmers managing irrigation in the paddies, and expat communities settling into their rainy-season routines. Beaches are still swimmable but choppier; surfers actually prefer the consistent swells. The island quiets down compared to July and August, though Christmas and New Year bring a brief spike of visitors from late December onward.

Over the past decade, December's rainfall patterns have held fairly steady around this 330–350mm range, though individual years vary—some years see heavier concentrations in the final week, others spread it more evenly. 2026 aligns with the historical norm. What has shifted slightly is the intensity of afternoon storms; they tend to be shorter and more dramatic now than they were ten years ago, less of an all-day drizzle and more of a 30-minute deluge followed by clearing skies.

December suits budget travelers, photographers chasing moody skies and lush green landscapes, and anyone seeking Bali without the crush. Plan around the rain—pack quick-dry clothes, expect some activities to shift by a day, and embrace indoor options like cooking classes or spa days. If you're traveling in early December 2026, you'll dodge the year-end crowds; if you're here mid-to-late month, book accommodation early and expect fuller resorts.