Verdict: Good month
Hakone Weather in August
August runs warm in Hakone, with daily highs around 30°C (86°F) and nights near 24°C (75°F). Expect showers on roughly 14 days of the month — rarely trip-ruining, worth planning around. Overall, August is a solid month to visit Hakone.
Average high
30°C / 86°F
Average low
24°C / 75°F
Rain days
~14
Precipitation
200 mm
What to pack for Hakone in August
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 14 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
August against the rest of the year
Warmest in Hakone: Aug (30°C / 86°F) · Coolest: Jan (10°C / 50°F) · Wettest: Jul (~17 rain days)
10°
3°
Jan
11°
3°
Feb
14°
7°
Mar
18°
11°
Apr
21°
15°
May
24°
19°
Jun
28°
23°
Jul
30°
24°
Aug
27°
22°
Sep
21°
16°
Oct
17°
11°
Nov
12°
5°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)