Weather in Lille in August

A good month. August works. It is not the peak, but nothing about it fights you. Highs average 22.9 °C, lows 13 °C, and rain falls on 13 days — nothing in the month is working against you.

August ranks 5 of 12 in Lille: past the worst of the year but short of June, which is the month to book if the dates are open.

Rain on 13 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

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 34.1 °C and the coldest night fell to 6.9 °C, and the wettest single day dropped 35 mm — roughly 48% of the month's rain in one day.

August is moderately variable: 22 mm in the driest year against 140 mm in the wettest, around an average of 73 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 9.2 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: 23.1 °C in July, 22.9 here, 20.2 in September. Nothing about the timing within the month matters much.

Daylight in August

14.6 hours of daylight, losing 1.7 hours across the month. That is between Lille's extremes of 16.4 and 8 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 22.6 °C between the year's warmest afternoons and coldest nights.

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 Lille versus nearby

If Lille is one option among several, the nearby comparison is worth making. Breda is close enough to be a coin toss — within a degree on temperature, 2 days more rain. Rotterdam is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: August is effectively as good as it gets here — 5 points behind June, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Lille

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