Gunsan weather by month & the best time to visit
South Korea · beach resort · humid subtropical climate
The best time to visit Gunsan is October — its sunniest month (Sunshine Score 79/100), with May close behind. Gunsan averages about 1,884 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 56 mm of rain in October.
When is the best time to visit Gunsan?
For sunshine, the best time to visit Gunsan is October, then May. The dullest month is January (0/100, 27 mm of rain). The full month-by-month picture is in the table below.
How sunny is Gunsan?
Gunsan gets a moderate 1,884 hours of sunshine a year. 79 Sunshine Score points separate October (79) from January (0), so the month you pick matters. It ranks #12 of 14 destinations in South Korea for annual sunshine, below the national median of 1,959 hours. Rain has a clear season: the wettest stretch, around July, carries about 56% of the annual 1,267 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 3° / 37°F | -5° / 23°F | 27 mm | 2 | 5° / 41°F |
| February | 0 | 6° / 43°F | -3° / 27°F | 39 mm | 3 | 6° / 43°F |
| March | 20 | 11° / 52°F | 0° / 32°F | 50 mm | 4 | 7° / 45°F |
| April | 56 | 17° / 63°F | 5° / 41°F | 85 mm | 5 | 14° / 57°F |
| May | 74 | 23° / 73°F | 11° / 52°F | 85 mm | 6 | 19° / 66°F |
| June | 65 | 27° / 81°F | 17° / 63°F | 136 mm | 6 | 24° / 75°F |
| July | 62 | 29° / 84°F | 21° / 70°F | 317 mm | 6 | 27° / 81°F |
| August | 62 | 30° / 86°F | 22° / 72°F | 261 mm | 7 | 32° / 90°F |
| September | 65 | 25° / 77°F | 17° / 63°F | 134 mm | 5 | 29° / 84°F |
| October | 79 | 20° / 68°F | 10° / 50°F | 56 mm | 4 | 22° / 72°F |
| November | 34 | 13° / 55°F | 3° / 37°F | 45 mm | 2 | 17° / 63°F |
| December | 0 | 5° / 41°F | -3° / 27°F | 32 mm | 2 | 10° / 50°F |
Sea temperature in Gunsan by month
The sea off Gunsan is warmest in August at around 32°C / 90°F, and coolest in January at 5°C / 41°F. The water sits at a comfortable 21°C or warmer roughly 5 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
Head-to-head
How Gunsan compares month by month: Gunsan vs Seoul · Gunsan vs Cheongju · Gunsan vs Gwangju · Gunsan vs Jeju City · all comparisons
Gunsan: questions and answers
What kind of destination is Gunsan?
Gunsan is a beach resort in South Korea with a humid subtropical climate — the sea reaches 32°C at its warmest and is swimmable (21°C+) about 5 months a year.
How many hours of sunshine does Gunsan get a year?
Gunsan gets about 1,884 hours of sunshine a year, at its best around October.
When is the best time to visit Gunsan?
The sunniest time to visit Gunsan is October, when the Sunshine Score peaks at 79/100 (with May close behind). Expect daytime highs around 20°C / 68°F.
What is the least sunny month in Gunsan?
January is the least sunny month in Gunsan, scoring 0/100 with about 27 mm of rain.
What is the sea temperature in Gunsan?
The sea in Gunsan ranges from about 5°C (January) to 32°C (August). Month-by-month sea temperatures are on this page.
How strong is the sun in Gunsan?
The typical midday UV index in Gunsan peaks around 7 (high) in August, easing to about 2 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
Put the Gunsan sunshine badge on your site
A compact badge showing Gunsan's sunshine at a glance — free to embed under CC BY 4.0. Paste this wherever you'd like it to appear:
Live preview — this is exactly what your readers see: