Weather in Marseille in January

Shoulder season. January sits in between. You will get good days and you will lose some. Highs sit at 11.8 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

January ranks 12 of 12 — near the bottom of Marseille's year. May is the month that works, and the swing between the two is 27 points, which is a different holiday rather than a slightly better one.

Rain on 7 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 11.8 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 3 nights fall below freezing. Across the twenty years measured, the hottest January day reached 21.5 °C and the coldest night fell to -4 °C, and the wettest single day dropped 39 mm — roughly 81% of the month's rain in one day.

January is moderately variable: 5 mm in the driest year against 103 mm in the wettest, around an average of 48 mm. Roughly two Januarys in three land near that average, and the third does something else entirely.

Wind is light at 10.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, which at 11.8 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How January sits in the year

Temperatures hold steady either side: 12.6 °C in December, 11.8 here, 12.8 in February. Nothing about the timing within the month matters much.

Daylight in January

January sits at the dark end of Marseille's year — 9.3 hours of daylight against 15.4 at midsummer, gaining 0.8 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 13.3 °C in January — too cold to swim without a wetsuit. The sea peaks at 22.3 °C in August and bottoms out at 12.6 °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

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

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

January in Marseille versus nearby

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

So: January is a compromise. May is 27 points better and is what Marseille is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Marseille

See all twelve months in Marseille, or where else to go in January.