Weather in Groningen in June

Prime time. If you get to pick your dates, June is the one. Highs average 20.1 °C, lows 11.1 °C, and rain falls on 13 days — nothing in the month is working against you.

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

Rain on 13 days, 1 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 31.6 °C and the coldest night fell to 4.8 °C, and the wettest single day dropped 30 mm — roughly 47% of the month's rain in one day.

June is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest June on record still delivered 104 mm against 19 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 64 mm average is a reasonable planning figure, not a promise.

Wind is light at 12.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 77%, 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 2 °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 Groningen's year: 16.9 hours of daylight, gaining 0.4 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

Sea temperature

The sea sits at about 14.2 °C in June — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 18.4 °C in August and bottoms out at 5.3 °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 Groningen versus nearby

If Groningen is one option among several, the nearby comparison is worth making. Bielefeld is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Rotterdam is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: June is the answer for Groningen. If it is booked out or priced out, September is the next best thing at 2 points behind, and January is the month to keep off the shortlist.

Every month in Groningen

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