Weather in Nantes in October

A good month. October works. It is not the peak, but nothing about it fights you. Highs average 18 °C, lows 9.3 °C, and rain falls on 13 days — nothing in the month is working against you.

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

Rain on 13 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 October reaches 30 °C. Across the twenty years measured, the hottest October day reached 28.2 °C and the coldest night fell to -1.9 °C, and the wettest single day dropped 25 mm — roughly 30% of the month's rain in one day.

October is moderately variable: 30 mm in the driest year against 170 mm in the wettest, around an average of 83 mm. Roughly two Octobers in three land near that average, and the third does something else entirely.

Wind is light at 10.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 85%, high enough to notice on the warm days without dominating them.

How October sits in the year

The month is on the way down: 4.2 °C cooler than September, with November dropping another 5.1 °C. The first week and the last are not the same trip. Rain has already shifted: 5 days more than September had.

Daylight in October

11 hours of daylight, losing 1.6 hours across the month. That is between Nantes's extremes of 15.9 and 8.5 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 17.5 °C in October — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 20.5 °C in August and bottoms out at 11.1 °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

Shoulder. The value months — prices ease off and you get the place closer to itself.

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

October in Nantes versus nearby

If Nantes is one option among several, the nearby comparison is worth making. Bordeaux is a better bet in October — 2.4 °C warmer, 2 days less rain. Le Havre is the weaker option in October — 2 °C cooler, 3 days more rain.

So: October works, with September the better month by 17 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Nantes

See all twelve months in Nantes, or where else to go in October.