Weather in Shanghai in June

Shoulder season. June is shoulder season in Shanghai — cheaper, quieter, and a genuine gamble. You should expect rain on 16 days of the month, which is more days wet than dry.

June ranks 7 of 12 in Shanghai: past the worst of the year but short of October, which is the month to book if the dates are open.

This is wet-season rain: 16 wet days and 7 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Pack for 28.3 °C days and 21 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest June day reached 35.5 °C and the coldest night fell to 14.5 °C, and the wettest single day dropped 77 mm — roughly 39% of the month's rain in one day.

June is moderately variable: 33 mm in the driest year against 411 mm in the wettest, around an average of 195 mm. Roughly two Junes in three land near that average, and the third does something else entirely.

Wind is light at 13.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How June sits in the year

The month is on the way up: 3 °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. Rain has already shifted: 5 days more than May had.

Daylight in June

June is at or near the longest days of Shanghai's year: 14.2 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 22.2 °C in June — comfortable for a proper swim. The sea peaks at 27.5 °C in August and bottoms out at 8.5 °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

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

June in Shanghai versus nearby

If Shanghai is one option among several, the nearby comparison is worth making. Hangzhou is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Nanjing is close enough to be a coin toss — 2.5 °C warmer, 4 days less rain.

So: June is a compromise. October is 28 points better and is what Shanghai is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Shanghai

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