Verdict: Fair month
Hakone Weather in January
January is mild-to-cool in Hakone, topping out near 10°C (50°F) — comfortable with a layer on. Rain is occasional — about 8 wet days in a typical year. January is workable in Hakone if your dates are fixed — just plan around the conditions.
Average high
10°C / 50°F
Average low
3°C / 37°F
Rain days
~8
Precipitation
77 mm
What to pack for Hakone in January
- A proper warm jacket, and a hat for mornings
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
January 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)