Hakone · Month comparison
August vs December
December ranks #1 overall vs August at #12. Crisp and clear — winter onsen season opens with excellent Fuji visibility and low crowds.
August
#12 of 12 months
Worth considering
Peak summer — hottest and most expensive month; Fuji still fog-bound, crowds at maximum.
- ↑Hakone Fireworks Festival over Lake Ashi (early August): dramatic illumination of the lake at night
- ↑Late August mornings occasionally clear briefly; early risers get rare summer Fuji glimpses
December
#1 of 12 months
Best match
Crisp and clear — winter onsen season opens with excellent Fuji visibility and low crowds.
- ↑Excellent Mt Fuji clarity: December air is dry and clean, producing sharp sightlines from Lake Ashi and the ropeway
- ↑Lowest crowds of the post-autumn period: accommodation rates drop sharply after the foliage rush
| Factor | August | December |
|---|---|---|
| Weather score | 3 | 7 |
| Value score | 4 | 7 |
| Crowd score | 4 | 7 |
| Events score | 5 | 5 |
| Atmosphere | 5 | 8 |
| Avg high temp | 29°C | 9°C |
| Monthly rain | 195mm | 65mm |
| Daily sunshine | 5.5hrs | 6hrs |
August trade-offs
- ↓195mm of rainfall and persistent fog — hard cap applies; Fuji views rare and unpredictable
- ↓Most expensive month: peak summer rates apply across all accommodation categories
- ↓Hot and humid enough that walking between Gora and Lake Ashi in midday heat is genuinely tiring
December trade-offs
- ↓Cold: 2°C lows require proper layering for all outdoor activities including ropeway and lake walks
- ↓Christmas and New Year week (Dec 28–Jan 3) sees a brief price and crowd spike
- ↓Short daylight hours limit afternoon photography windows; the golden hour arrives before 4:30pm
Scores compare months within Hakone. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →