Gwangju is warmest in August, averaging 30° by day and 22° at night. The wettest month is July with 372 mm, and the year brings about 1512 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 6° | -5° | 43 mm | 8° | 9.9 h | Cool |
| February | 8° | -3° | 53 mm | 7° | 10.7 h | Cool |
| March | 14° | 0° | 87 mm | 8° | 11.7 h | Mild |
| April | 19° | 5° | 90 mm | 12° | 12.9 h | Sightseeing |
| May | 23° | 11° | 115 mm | 16° | 13.8 h | Mild |
| June | 27° | 16° | 198 mm | 20° | 14.4 h | Rainy season |
| July | 29° | 21° | 372 mm | 24° | 14.1 h | Rainy season |
| August | 30° | 22° | 245 mm | 26° | 13.3 h | Rainy season |
| September | 26° | 16° | 174 mm | 24° | 12.2 h | Mild |
| October | 20° | 9° | 47 mm | 20° | 11.1 h | Sightseeing |
| November | 15° | 3° | 63 mm | 15° | 10.1 h | Mild |
| December | 7° | -3° | 25 mm | 11° | 9.6 h | Cool |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: No month in Gwangju combines swimming warmth with dry skies.
Walking the city: April and October — highs of 19–20° and no more than 90 mm of rain a month.
Wet season: June, July and August — up to 372 mm in a single month.