Weather in Sapporo in June

Prime time. June is about as good as Sapporo gets. Highs average 21.4 °C, lows 12 °C, and rain falls on 10 days — nothing in the month is working against you.

June is the highest-scoring month of the twelve. The nearest rival is July, and the month at the other end of the year is February.

Rain on 10 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average June reaches 30 °C. Across the twenty years measured, the hottest June day reached 31.9 °C and the coldest night fell to 4.6 °C, and the wettest single day dropped 50 mm — roughly 61% of the month's rain in one day.

June is moderately variable: 32 mm in the driest year against 172 mm in the wettest, around an average of 82 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind is light at 4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way up: 4.6 °C warmer than May, and July adds another 3.6 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in June

June is at or near the longest days of Sapporo's year: 15.3 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 12.7 °C in June — too cold to swim without a wetsuit. The sea peaks at 20.5 °C in August and bottoms out at 3.5 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

June in Sapporo versus nearby

If Sapporo is one option among several, the nearby comparison is worth making. Sendai is close enough to be a coin toss — 3.8 °C warmer, 2 days more rain. Niigata is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: June is the answer for Sapporo. If it is booked out or priced out, July is the next best thing at 6 points behind, and February is the month to keep off the shortlist.

Every month in Sapporo

See all twelve months in Sapporo, or where else to go in June.