Hakodate
41.77° N, 140.73° E
When to go?
Mean −2 °C, 12 rain days in the month (70 mm).
Against
- Freezinglows of −6 °C
Mean −2 °C, 10 rain days in the month (58 mm).
Against
- Freezinglows of −5 °C
Mean 2 °C, 11 rain days in the month (70 mm).
Nothing against it.
Mean 7 °C, 11 rain days in the month (77 mm).
Nothing against it.
Mean 12 °C, 13 rain days in the month (105 mm).
Nothing against it.
Mean 16 °C, 12 rain days in the month (113 mm).
The least rainy of the months with the right temperature.
Mean 20 °C, 15 rain days in the month (153 mm).
Against
- Often rainyrain on 5 days in 10
Mean 22 °C, 15 rain days in the month (198 mm).
Good for
- Ideal for the seawater at 22 °C
Against
- Often rainyrain on 5 days in 10
Mean 19 °C, 13 rain days in the month (170 mm).
Good for
- Ideal for the seawater at 22 °C
Mean 13 °C, 12 rain days in the month (119 mm).
Nothing against it.
Mean 6 °C, 13 rain days in the month (105 mm).
Nothing against it.
Mean 0 °C, 14 rain days in the month (90 mm).
Against
- Freezinglows of −3 °C
No ideal month: the best months are June, September, the least rainy with the right temperature. Nothing against March–May, October–November either. Ideal for the sea: August–September. Avoid December–February (freezing), July–August (often rainy).
What is the climate like?
Temperature and rain
Monthly min and max temperature (°C)
Monthly min and max temperature (°C)
How much it rains
Rain days and how much water
Rain days and how much water
Bars: length = rain days, thickness = mm on a rain day, area = the month's rain. 3 mm a day7 mm a day15 mm a day
Colour = the month's rain: 103060100160250400mm
Daylight hours
Daylight and sky: sunrise, sunset and cloud cover
daylight under a clear sky (average share)daylight under cloud
daylight under a clear sky (average share)daylight under cloud
Times on the 15th of each month, in local time: daylight saving where and when it applies, standard time in the other months.
Sea temperature: Tsugaru Strait
Monthly mean sea temperature: Tsugaru Strait (°C)
Monthly mean sea temperature: Tsugaru Strait (°C)
Snow on the ground
Mean snow depth on the ground (cm)
Mean snow depth on the ground (cm)
Effect of climate change
Today's climate (1996–2025) compared with 1961–1990:
In short
Year by year
Temperature of each year
Against 1961–1990 the mean temperature of today (1996–2025) has changed by +1.1 °C; in the last ten years by +2.1 °C. Warmest year: 2025 (+3.1 °C), coldest: 1984 (−1.0 °C).
November and March warmed the most (+1.7 and +1.5 °C), August the least (+0.5 °C). The warm season (above the annual mean of then, 8 °C) begins 6 days earlier and ends 6 days later.
Warming stripes: after an idea by Ed Hawkins (University of Reading), showyourstripes.info, CC BY 4.0.
Rain of each year (% against 1961–1990)
more rain than in 1961–1990less rain
Rain in a year: no clear trend, dry and wet years alternate as before.
The sea, then and now
+2.1 °Cthe sea today, compared with 1961–1990
Snow, then and now
≈no clear change of winter snow compared with 1961–1990