Mud festival in South Korea
In July, the peaceful seaside town of Boryeong turned into a chaos of mud for 9 days. We recommend putting this festival on your bucket list.
Gunsan Weather in May
May in Gunsan averages 22°C (72°F) during the day and 14°C (57°F) at night. Quite a bit of rainfall is typical this month, with around 90 mm (3.5 in) on average. An umbrella is a good idea.
Rainfall in Gunsan in May
Typically around 8 days of rainfall are expected, averaging 90 mm (3.5 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Gunsan in May
May tends to be one of the excellent months in Gunsan, with 22°C (72°F) in the afternoon and 14°C (57°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Gunsan in May
The days are predominantly sunny, with an estimated total of around 255 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If your ideal day consists of dry skies and pleasant temperatures, May and October typically offer the best circumstances for Gunsan.
Gunsan Temperature in May
Min Temperature
14°C (57°F)
Max Temperature
22°C (72°F)
Chance of Rain
26%
Precipitation
90 mm (3.5 in)
Rainy days
8 days
Humidity
74% *
Sunshine
255 hours *
Percentage Sunshine
58% *
* Data from: Buan, South Korea (44 KM, 27 Miles).
Gunsan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Gunsan - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Gunsan typically rise from around 20°C (68°F) at the start of May to approximately 24°C (75°F) by the end. Nights are cool, with lows typically ranging from 11°C (52°F) to 16°C (61°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Gunsan in May
Browse day-by-day weather records for Gunsan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Gunsan historical weather extremes in May
Based on weather observations in Gunsan between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 28, 2003, with a maximum of 32°C (90°F).
- Gunsan experienced its chilliest May day on May 7, 2002, reaching only 12°C (54°F).
- Nighttime temperatures dropped to 5°C (41°F) on May 1, 2010, marking the coldest May night on record.
Best Places in South Korea in May
Find out more about the weather in South Korea and which places have the best travel conditions in this month. See all of South Korea in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Gunsan in May
For Gunsan in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Gunsan in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping8/10 -
Outdoor sports9/10
Gunsan 3-Day Forecast
More climate data for Gunsan
Temperature Rainfall Sunshine Humidity
See the full Gunsan climate overview or explore weather in South Korea.
Popular in May
Where to go in May - average daytime high across popular destinations.
Seoul
24°C (75°F) Jeonju25°C (77°F) Suwon24°C (75°F) Gyeongju25°C (77°F) Seogwipo
22°C (72°F) Incheon21°C (70°F) Busan22°C (72°F) Jeju20°C (68°F) Bucket list
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