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Seoul in May: Weather, Average temperature and Climate

Take a look at past year’s weather for Seoul in May and see if it is worth visiting.
Check flight prices to Seoul on Avionero:
May

Weather in Seoul in May 2025

Good Weather
Warm
☁️
Cloudy
✈️
$1,687 - $1,923
Are you considering a trip to Seoul in May? Well, the weather is usually on your side with an average maximum temperature of +73°F and about 12 sunny days. Just keep in mind that there may be some rain, with an average of 5 rainy days and 85 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flights in one click on Avionero.

Average weather

☀️
+73°F
Avg. max. temperature
+41°F
Min.
+91°F
Max.
85 mm
Total precipitation
64%
Avg. humidity
2 m/s
Avg. wind
12 ☀️
Sunny Days
14 ⛅️
Cloudy
5 🌦
Rainy
Our opinion: Seoul has good weather in May.

Average temperature in Seoul in May

Here are the expected maximum, average and minimum temperatures in Seoul for May based on the historical data.
Last Year
Historical Data

Going from a maximum of +84°F during the day to a minimum of +43°F during the night, the temperature in May averages around +75°F.

The average maximum temperature goes up 35% by the end of the month, compared with the beginning of the month, from +64°F to +79°F.

Is Seoul warm or cold in May?

Seoul is typically warm in May.

Maximum temperatures go up compared to the previous month from +63°F to +73°F. The minimum temperature also goes up from +45°F to +55°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

Take a look at how May is compared to other months in Seoul:

Travel to Seoul

Click to see more details
✈️
24
Flights per week
$1,687
Min. Price
$1,923
Max. Price

Climate in Seoul in May

Seoul weather looks like this, on average, in May and the surrounding months.
AprilMayJune
Avg. temperature
+63°F+73°F+81°F
Min. temperature
+28°F+41°F+52°F
Max. temperature
+86°F+91°F+95°F
Rainfall
62 mm85 mm120 mm
Wind
2 m/s2 m/s2 m/s
Humidity
59%64%70%
Air pressure
1013 HPa1010 HPa1006 HPa
Sunny days
12127
Cloudy days
131418
Rainy days
555
Snowy days
000

May weather is still as good as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +63°F to +73°F during the day. Prepare for more rain. Average rainfall goes from 62 mm to 85 mm. Humidity rises from 59% to 64%. The average wind speed doesn’t change much during May, staying around 2 m/s. The amount of sunny days stay about the same, averaging 12 sunny days during the month.

June brings much the same weather, it remains good.

Wind

Wind speed in Seoul in May based on historical data.
Last Year
Historical Data

The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.

The average wind speed in Seoul is gradually increasing during May, going from 3 m/s to 3 m/s over the course of the month.

Rain

Amount of rainfall in mm during May in Seoul based on historical data.
Last Year
Historical Data
Typically, there is a 6% chance of rain on an average day in May, with total rainfall of approximately 8 mm. The maximum amount of rainfall per day is around 6 mm, which is considered light rain. Seoul is amazing in May with as little as 2 rainy days on average, so plan adventures in the great outdoors.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Seoul wettest month is July, where a typical day has a 35% chance of precipitation and 261 mm of rainfall per day. January, on the other hand, is the driest month with a mere 3% chance of precipitation and 10 mm of rainfall per day.

How was the weather last May in Seoul?

This is the weather in Seoul in May 2023:
1 May
☀️
+65°F
2 May
☀️
+65°F
3 May
☀️
+68°F
4 May
☀️
+76°F
5 May
☀️
+75°F
6 May
☁️
+77°F
7 May
☀️
+73°F
8 May
☀️
+63°F
9 May
☀️
+77°F
10 May
☀️
+78°F
11 May
☀️
+75°F
12 May
☀️
+81°F
13 May
☀️
+76°F
14 May
☀️
+66°F
15 May
☀️
+71°F
16 May
☀️
+73°F
17 May
☀️
+80°F
18 May
☀️
+78°F
19 May
☀️
+74°F
20 May
☀️
+77°F
21 May
🌫️
+77°F
22 May
🌫️
+77°F
23 May
🌫️
+85°F
24 May
☀️
+85°F
25 May
☀️
+77°F
26 May
☀️
+73°F
27 May
☀️
+76°F
28 May
☀️
+84°F
29 May
☁️
+82°F
30 May
☀️
+75°F
31 May
☀️
+80°F
In May 2023 Seoul had 26 sunny days, 2 cloudy days, and 0 rainy days. The average maximum temperature was +75°F, with an absolute maximum of +84°F and a minimum of +63°F. The average humidity was 55%, with a maximum of 94% and a minimum of 14%. The average wind speed was 3 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in May?

Climate Change Over the Years

This is how Seoul climate has changed over the last 43 years.

The climate in Seoul in May has not changed that much over the last 43 years.

The average temperature was the lowest in 1981 (+72°F) and the highest in 2003 (+81°F). The driest year was 2022 with only 12 mm of rainfall, and the wettest year was 2021 with 373 mm.

FAQ

Frequently asked questions about the weather in Seoul in May:

Is May a good time to visit Seoul?

May is a really good time to go to Seoul. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Seoul.

Can you sunbathe in Seoul in May?

May is warm in Seoul. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.

Is Seoul rainy in May?

Seoul is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.

Is it sunny in Seoul in May?

The amount of sunny days in Seoul during May varies; prepare for a mix of clouds and sun.

How much does it cost to fly to Seoul in May?

The normal prices to fly to Seoul is $1,687 - $1,923. It means that the majority of our users have picked flights in this range. To find the best price we recommend you search early, using our flexible dates feature.

Monthly weather in Seoul

Source of the data

For this page, we’ve looked at the typical weather in Seoul, based on historical hourly weather data from January 1, 1979, to December 31, 2022.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.