Weather in Groningen in August

A good month. August is a solid month to be in Groningen. You should expect rain on 16 days of the month, which is more days wet than dry.

August ranks 4 of 12 in Groningen: past the worst of the year but short of June, which is the month to book if the dates are open.

This is persistent light rain rather than storms: 16 wet days but only 2 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 31.7 °C and the coldest night fell to 7.5 °C, and the wettest single day dropped 34 mm — roughly 41% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 157 mm against 25 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 82 mm average is a reasonable planning figure, not a promise.

Wind is light at 11.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 22.1 °C in July, 22 here, 18.8 in September. Nothing about the timing within the month matters much.

Daylight in August

14.9 hours of daylight, losing 1.9 hours across the month. That is between Groningen's extremes of 16.9 and 7.6 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 18.4 °C in August — swimmable, but it takes a moment to commit. This is the warmest the water gets all year.

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.

August 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, 1 day less rain. Rotterdam is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: August is effectively as good as it gets here — 6 points behind June, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Groningen

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