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Weather in Ulsan for May 2026

Your guide to Ulsan weather in May - trends and predictions

    Temperatures

  • So far, May 2026 in Ulsan is slightly warmer than the historical average by 0.9 °C.

  • The forecast for the next days in Ulsan predicts a temperature of 25.6 °C, which is cooler than the historical average.

  • In general, the average temperature in Ulsan at the beginning of May is 20 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 24 °C by the end of May.

    • Rain 🌧️

  • The climate of Ulsan in May is notably wet, with an average of 12 rainy days, and a total of 117 mm of precipitation.

Average dry days
19
Dry days
Average rainy days
12
Rainy days
Average snowy days
0
Snow days
Average temperatures
22°/11°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
69 %
Avg humidity

Ulsan Weather May

Move between months or click on a day
April
June
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate or heavy rain shower
22°
2
Overcast
23°
3
Moderate or heavy rain shower
15°
4
Partly cloudy
20°
5
Moderate rain at times
19°
6
Moderate or heavy rain shower
19°
7
Sunny
22°
8
Overcast
21°
9
Moderate or heavy rain shower
19°
10
Patchy rain possible
22°
11
Moderate rain at times
22°
12
Sunny
23°
13
Overcast
25°
14
Overcast
24°
15
Moderate rain at times
23°
16
Moderate or heavy rain shower
26°
17
Patchy rain possible
28°
18
Overcast
26°
19
Sunny
26°
20
Partly cloudy
23°
21
Overcast
25°
22
Patchy rain possible
19°
23
Partly cloudy
19°
24
Moderate or heavy rain shower
18°
25
Patchy rain possible
22°
26
Patchy rain possible
22°
27
Thundery outbreaks possible
21°
28
Patchy rain possible
25°
29
Sunny
21°
30
Sunny
28°
31
Sunny
29°

Temperatures trend during May in Ulsan

See the weather trend as well as the moving average line

May weather in Ulsan day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
1 May Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /11° 15.6 mm 7
2 May Overcast
Overcast
 23° /9° 0.1 mm 8
3 May Moderate or heavy rain shower
Moderate or heavy rain shower
 15° /10° 15.8 mm 3
4 May Partly cloudy
Partly cloudy
 20° /8° 0 mm 8
5 May Moderate rain at times
Moderate rain at times
 19° /6° 2.3 mm 7
6 May Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /8° 1.4 mm 7
7 May Sunny
Sunny
 22° /8° 0 mm 8
8 May Overcast
Overcast
 21° /10° 0.2 mm 8
9 May Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /8° 11 mm 7
10 May Patchy rain possible
Patchy rain possible
 22° /10° 0.1 mm 7
11 May Moderate rain at times
Moderate rain at times
 22° /10° 0.6 mm 7
12 May Sunny
Sunny
 23° /10° 3.7 mm 7
13 May Overcast
Overcast
 25° /10° 0 mm 8
14 May Overcast
Overcast
 24° /12° 0 mm 8
15 May Moderate rain at times
Moderate rain at times
 23° /13° 0.6 mm 8
16 May Moderate or heavy rain shower
Moderate or heavy rain shower
 26° /13° 21.5 mm 8
17 May Patchy rain possible
Patchy rain possible
 28° /15° 6.7 mm 8
18 May Overcast
Overcast
 26° /13° 0 mm 8
19 May Sunny
Sunny
 26° /13° 0 mm 8
20 May Partly cloudy
Partly cloudy
 23° /16° 28.5 mm 5
21 May Overcast
Overcast
 25° /17° 0 mm 6
22 May Patchy rain possible
Patchy rain possible
 19° /14° 0.7 mm 5
23 May Partly cloudy
Partly cloudy
 19° /12° 1.9 mm 5
24 May Moderate or heavy rain shower
Moderate or heavy rain shower
 18° /11° 4.3 mm 7
25 May Patchy rain possible
Patchy rain possible
 22° /12° 1.2 mm 6
26 May Patchy rain possible
Patchy rain possible
 22° /13° 7.1 mm 5
27 May Thundery outbreaks possible
Thundery outbreaks possible
 21° /14° 15.7 mm 4
28 May Patchy rain possible
Patchy rain possible
 25° /14° 0.1 mm 7
29 May Sunny
Sunny
 21° /11° 0 mm 6
30 May Sunny
Sunny
 28° /15° 0 mm 10
31 May Sunny
Sunny
 29° /17° 0 mm 8.8
Next
Important Notice
Our weather forecast for Ulsan in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Ulsan forecast closer to your planned date for the most up-to-date weather information.
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Ulsan in May - FAQ

What are the expected maximum and minimum temperatures in Ulsan during May?

Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Ulsan during May?

Significant rainfall exceeding 117 mm is expected in Ulsan during May, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in Ulsan during May?

The average wind speed in Ulsan during May is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Ulsan

Explore the daily rainfall trends and prepare for Ulsans May weather 💧
Typically, Ulsan has 12 rainy days in May with a total of 117 mm of rainfall.

UV exposure in Ulsan during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️

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Location coordinates Where is Ulsan?

Get accurate weather forecasts for Ulsan, located at latitude 35.537 and longitude 129.317. Stay updated with localized weather information tailored for Ulsan.

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