Weather in Chamonix-Mont-Blanc in June

A good month. June is a solid month to be in Chamonix-Mont-Blanc. You should expect rain on 16 days of the month, which is more days wet than dry.

June ranks 3 of 12 in Chamonix-Mont-Blanc. Only September scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 16 days, 3 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 31.5 °C and the coldest night fell to -0.2 °C, and the wettest single day dropped 33 mm — roughly 31% 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 163 mm against 54 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 105 mm average is a reasonable planning figure, not a promise.

Wind is light at 2.8 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: 4.2 °C warmer than May, and July adds another 1.8 °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 Chamonix-Mont-Blanc's year: 15.7 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

With no coast nearby, the year swings a fair way — 28.9 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 1060 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

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 Chamonix-Mont-Blanc versus nearby

If Chamonix-Mont-Blanc is one option among several, the nearby comparison is worth making. Annecy is close enough to be a coin toss — 3.1 °C warmer, 1 day less rain. Zermatt is the weaker option in June — 3.3 °C cooler, 1 day more rain.

So: June is effectively as good as it gets here — 3 points behind September, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Chamonix-Mont-Blanc

See all twelve months in Chamonix-Mont-Blanc, or where else to go in June.