May weather forecast
Ansan, South Korea

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Weather in May

May witnesses a considerable increase in temperatures, the highest since the start of the year, in Ansan. With average highs soaring to 21.8°C (71.2°F), people begin to feel the early signs of summer. This rise in temperature is paralleled by longer daylight hours and increased humidity, making the overall mood bright and lively. The increase in temperature carries on into the month of June, the first official month of summer in South Korea.

Temperature

The beginning of May in Ansan, South Korea, signals a rise in the average high-temperature, moving from a mild 15.7°C (60.3°F) in April to a pleasant 21.8°C (71.2°F). During May, Ansan records a consistent average nighttime temperature of 12.6°C (54.7°F).

Humidity

In Ansan, South Korea, the average relative humidity in May is 66%.

Rainfall

In Ansan, South Korea, in May, it is raining for 9.1 days, with typically 51mm (2.01") of accumulated precipitation. In Ansan, during the entire year, the rain falls for 115.1 days and collects up to 748mm (29.45") of precipitation.

Snowfall

In Ansan, snow does not fall in May through October.

Sea temperature

In May, the average sea temperature in Ansan is 13.3°C (55.9°F).
Note: Diving into 13.3°C (55.9°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In Ansan, the average length of the day in May is 14h and 10min.
On the first day of the month, sunrise is at 05:37 and sunset at 19:22. On the last day of May, in Ansan, sunrise is at 05:13 and sunset at 19:46 KST.

Sunshine

In Ansan, the average sunshine in May is 10h.

UV index

In Ansan, South Korea, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 5 in May translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Updated: Jan 31, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What are May temperatures in Ansan?

The high-temperature during May is 21.8°C (71.2°F) and the low-temperature is 12.6°C (54.7°F).

What is the average humidity in May in Ansan?

The average relative humidity in May is 66%.

How many days does it rain in May in Ansan?

In May, in Ansan, South Korea, the rain falls for 9.1 days. Throughout May, 51mm (2.01") of precipitation is accumulated.

When it does not snow in Ansan?

In Ansan, snow does not fall in May through October.

Does it snow in Ansan in May?

In May, it doesn't snow. April is the latest month when it typically snows.

How cold is the water in May in Ansan?

In Ansan, the average seawater temperature in May is 13.3°C (55.9°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

How many hours of daylight does Ansan have in May?

In Ansan, South Korea, the average day length in May is 14h and 10min.

What time are sunrise and sunset in May in Ansan?

In May, on the first day of the month, sunrise is at 05:37 and sunset at 19:22. On the last day of the month, sunrise is at 05:13 and sunset at 19:46 KST.

How long on average sun shines in May in Ansan?

The average sunshine duration in May in Ansan is 10h.

What is the UV index intensity in May in Ansan?

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in May
Ansan, South Korea

Average temperature in May - Ansan, South Korea
  • Average high temperature in May: 21.8°C

The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (0.6°C).

  • Average low temperature in May: 12.6°C

The month with the highest average low temperature is August (22.3°C).
The coldest month (with the lowest average low temperature) is January (-5°C).

Average pressure in May
Ansan, South Korea

Average pressure in May - Ansan, South Korea
  • Average pressure in May: 1011.3mbar

The month with the highest atmospheric pressure is January (1025.3mbar).
The month with the lowest atmospheric pressure is July (1007mbar).

Average wind speed in May
Ansan, South Korea

Average wind speed in May - Ansan, South Korea
  • Average wind speed in May: 9.8km/h

The windiest month (with the highest average wind speed) is March (11.6km/h).
The calmest months (with the lowest average wind speed) are June and September (8km/h).

Average humidity in May
Ansan, South Korea

Average humidity in May - Ansan, South Korea
  • Average humidity in May: 66%

The month with the highest relative humidity is July (81%).
The months with the lowest relative humidity are February and March (58%).

Average rainfall in May
Ansan, South Korea

Average rainfall in May - Ansan, South Korea
  • Average rainfall in May: 51mm

The wettest month (with the highest rainfall) is July (182mm).
The driest month (with the least rainfall) is January (13mm).

Average rainfall days in May
Ansan, South Korea

Average rainfall days in May - Ansan, South Korea
  • Average rainfall days in May: 9.1 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is January (3.3 days).

Average snowfall in May
Ansan, South Korea

Average snowfall in May - Ansan, South Korea
  • Average snowfall in May: 0mm

The month with the highest snowfall is February (46mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in May
Ansan, South Korea

Average snowfall days in May - Ansan, South Korea
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is December (6.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in May
Ansan, South Korea

Average sea temperature in May - Ansan, South Korea
  • Average sea temperature in May: 13.3°C

The best month for swimming (with the highest average sea temperature) is August (23.4°C).
The coldest month (with the lowest average sea temperature) is February (3.3°C).

Average daylight in May /
Average sunshine in May
Ansan, South Korea

Average daylight in May / Average sunshine in May - Ansan, South Korea
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in May: 10h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are November and December (Average sunshine: 5h and 48min).

Average sunshine days in May
Ansan, South Korea

Average sunshine days in May - Ansan, South Korea
  • Average sunshine days in May: 20.6 days

The month with the most sunshine days is January (23.8 days).
The month with the least sunshine days is August (8.5 days).

Average UV index in May
Ansan, South Korea

Average UV index in May - Ansan, South Korea
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in May
Ansan, South Korea

Average cloud cover in May - Ansan, South Korea
  • Average cloud cover in May: 29

The month with the most cloud cover is July (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 24).

Average visibility in May
Ansan, South Korea

Average visibility in May - Ansan, South Korea
  • Average visibility in May: 9km

The months with the highest visibility are January, February, March, April, October, November and December (10km).
The month with the lowest visibility is July (8km).

Ansan, South Korea

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