Changwon is warmest in August, averaging 29° by day and 24° at night. The wettest month is July with 335 mm, and the year brings about 1504 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 7° | -1° | 43 mm | 12° | 9.9 h | Cool |
| February | 9° | 1° | 53 mm | 11° | 10.7 h | Cool |
| March | 14° | 4° | 84 mm | 12° | 11.7 h | Mild |
| April | 17° | 9° | 102 mm | 14° | 12.9 h | Sightseeing |
| May | 21° | 13° | 102 mm | 16° | 13.9 h | Sightseeing |
| June | 25° | 18° | 198 mm | 20° | 14.4 h | Rainy season |
| July | 27° | 22° | 335 mm | 24° | 14.2 h | Rainy season |
| August | 29° | 24° | 236 mm | 27° | 13.3 h | Rainy season |
| September | 26° | 19° | 222 mm | 25° | 12.2 h | Rainy season |
| October | 21° | 13° | 53 mm | 21° | 11.1 h | Sightseeing |
| November | 16° | 7° | 54 mm | 18° | 10.1 h | Mild |
| December | 8° | 1° | 22 mm | 14° | 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 Changwon combines swimming warmth with dry skies.
Walking the city: April, May and October — highs of 17–21° and no more than 102 mm of rain a month.
Wet season: June, July, August and September — up to 335 mm in a single month.