Winter
Down jacket, warm hat, gloves. Lake Kawaguchiko regularly drops below freezing overnight.
Climate
Fuji temperature by month.
Three altitudes, twelve months. Lake-level Kawaguchiko, fifth station 2,300 m and the 3,776 m summit. Pack accordingly.
Numbers
Average high and low (°C)
Daytime high / overnight low in degrees Celsius. Summit data approximated from the Mount Fuji weather observatory.
| Month | Base (~830 m) | Fifth station (~2,300 m) | Summit (3,776 m) |
|---|---|---|---|
| January | 3 / -6 | -15 / -22 | -15 / -22 |
| February | 4 / -6 | -15 / -22 | -16 / -23 |
| March | 8 / -2 | -9 / -16 | -12 / -19 |
| April | 14 / 4 | -3 / -10 | -7 / -13 |
| May | 19 / 9 | 3 / -5 | -1 / -8 |
| June | 22 / 14 | 8 / 0 | 4 / -3 |
| July | 26 / 18 | 12 / 4 | 8 / 1 |
| August | 27 / 19 | 13 / 5 | 9 / 2 |
| September | 23 / 15 | 9 / 1 | 5 / -2 |
| October | 18 / 9 | 3 / -5 | -1 / -8 |
| November | 12 / 3 | -3 / -10 | -7 / -14 |
| December | 6 / -3 | -11 / -18 | -13 / -20 |
What to wear
By season at the base
Spring
Layers. Mornings near zero, afternoons warm. A windproof shell is enough on most days.
Summer
T-shirt and shorts by the lakes, sweater for evenings. Sun protection matters more than warmth.
Autumn
Jacket and light layers. Early November can hit single digits before sunrise.
FAQ
Common questions
How cold is Mount Fuji summit in summer?
Around 5-10 °C at dawn in July and August. Wind chill drops it lower. Even summer climbers need a warm layer at the top.
When does it snow on Mount Fuji?
First dusting usually in October, full cap by mid-November. Snow stays into June at the summit in most years.
Is it warm enough to swim at Lake Kawaguchiko?
Yes in July and August water temperature hits about 22 °C, though most visitors just paddle.
Plan