Ansan Weather in May
Ansan in May sees pleasant daytime temperatures of 21°C (70°F) and nighttime lows of 13°C (55°F). Rainfall is fairly high this month at around 100 mm (3.9 in), so pack a rain jacket to stay dry.
Rainfall in Ansan in May
Past climate data indicates that roughly 8 days will see rain, totalling around 100 mm (3.9 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Ansan in May
Ansan in May gets highs of 21°C (70°F) during the day and drops to 13°C (55°F) at night. Conditions are often most pleasant around the middle of the day. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Ansan in May
The month enjoys around 242 hours of sunshine, creating mostly sunny days with good weather conditions.If you prefer enjoying temperate temperatures and rain-free days, October typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Ansan's climate page.
Ansan Temperature in May
Min Temperature
13°C (55°F)
Max Temperature
21°C (70°F)
Chance of Rain
26%
Precipitation
100 mm (3.9 in)
Rainy days
8 days
Humidity
68% *
Sunshine
242 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ansan typically rise from around 22°C (72°F) at the start of May to approximately 25°C (77°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 15°C (59°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 for Ansan in May
Browse day-by-day weather records for Ansan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ansan historical weather extremes in May
Based on weather observations in Ansan between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 31, 2014, with a maximum of 32°C (90°F).
- The coldest May day was on May 4, 1990, with a maximum of 13°C (55°F).
- The coldest night in May in Ansan was on May 1, 2010, with a minimum of 3°C (37°F).
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 →
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tolerable
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What to Wear in Ansan in May
For Ansan 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Ansan in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit South Korea, check out our Ansan's climate page.
Temperature Rainfall Sunshine Humidity
See the full Ansan climate overview or explore weather in South Korea.
