Weather in Gwangju in December

A hard month. December asks something of you. Go in knowing what. Highs sit at 6.6 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

December ranks 11 of 12 — near the bottom of Gwangju's year. October is the month that works, and the swing between the two is 59 points, which is a different holiday rather than a slightly better one.

Rain on 7 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 6.6 °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: 23 nights drop below freezing, so anything left outside stays frozen. Across the twenty years measured, the hottest December day reached 19.7 °C and the coldest night fell to -11.9 °C, and the wettest single day dropped 28 mm — roughly 78% of the month's rain in one day.

December is moderately variable: 11 mm in the driest year against 85 mm in the wettest, around an average of 36 mm. Roughly two Decembers in three land near that average, and the third does something else entirely.

Wind is light at 9.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, which at 6.6 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How December sits in the year

The month is on the way down: 7.1 °C cooler than November, with January dropping another 2.1 °C. The first week and the last are not the same trip.

Daylight in December

December sits at the dark end of Gwangju's year — 9.8 hours of daylight against 14.5 at midsummer, holding steady all month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 17.6 °C in December — cold — a quick dip rather than a swim, and a wetsuit if you are in for longer. The sea peaks at 27.3 °C in August and bottoms out at 14.4 °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

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

December in Gwangju versus nearby

If Gwangju is one option among several, the nearby comparison is worth making. Daegu is the weaker option in December — within a degree on temperature, 3 days less rain. Busan is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: December is a compromise. October is 47 points better and is what Gwangju 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 Gwangju

See all twelve months in Gwangju, or where else to go in December.