5G signal is almost available in the city. The native SIM card guarantees compatibility with tools like ChatGPT and Gemini. I've already repurchased it three times. Highly recommended! 3GB per day on average is more than enough.
The only downside is that it only offers 4-day and 7-day options.
Anonymous User
Family
Hakone Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Hakone year round climate
Spring (March–May): Average 11.8–18.9°C, mild and comfortable climate, but with relatively high rainfall and frequent cloudy and rainy days. Common activities: Flower viewing (such as mountain cherry blossoms and azaleas), hot spring bathing, hiking. Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
Summer (June–August): Average 22.8–27.9°C, warm and humid, with relatively high rainfall, especially in June. Common activities: Hiking, sightseeing at Lake Ashi, riding the Hakone Ropeway, experiencing hot springs. Recommended clothing: Breathable short-sleeved clothing, light long pants, rain gear.
Autumn (September–November): Average 19.0–26.1°C, pleasantly cool, with more sunny days. Common activities: Maple leaf viewing, hot spring bathing, hiking, enjoying the natural beauty of Hakone. Recommended clothing: Light jacket, long-sleeved shirt.
Winter (December–February): Average 6.2–8.4°C, cold and dry, with occasional snowfall. Common activities: Hot spring bathing, enjoying snow scenery (depending on snowfall), indoor activities. Recommended clothing: Warm jacket, sweater, scarf, hat, gloves.
Hakone climatological average
Annual average temperature: approx. 17°C / Annual rainfall: approx. 2182 mm / Summer humidity: 70%–80% / Rainiest month: June
Hakone monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
6.2°C
43.1
February
7.5°C
109.2
March
11.8°C
191.3
April
16.2°C
234
May
18.9°C
262.2
June
22.8°C
346.2
July
27.9°C
198.4
August
27.9°C
227.1
September
26.1°C
242.3
October
19°C
152.5
November
14.7°C
137.1
December
8.4°C
38.8
Hakone weather for the next seven days
9/14
Monday
Patchy rain nearby
25.3°C/20.2°C
9/15
Tuesday
Light rain shower
20.6°C/18.6°C
9/16
Wednesday
Light rain shower
19.9°C/17.6°C
9/17
Thursday
Patchy rain nearby
22.4°C/16.9°C
9/18
Friday
Cloudy
20°C/16.8°C
9/19
Saturday
Light rain shower
20°C/18.5°C
9/20
Sunday
Light rain shower
21.3°C/18.6°C
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