South Korea Seoul Weather in April — Climate Guide
April in Seoul is Excellent
April is Excellent for Seoul.
April is Seoul's peak season — cherry blossoms in full bloom. Yeouido Park (Yunjungno Road), Seokchon Lake, Children's Grand Park (1,400+ trees), and Bukhansan National Park all reach maximum bloom in early-to-mid April.
Yeouido Cherry Blossom Festival (early-to-mid April) is THE event. The 5km Yunjungno Road becomes pedestrian-only for the festival; nighttime illumination of cherry blossoms is genuinely magical. Free entry; food trucks and cultural performances throughout.
Travel score
Seoul April Weather Stats
Avg High
18°C
Avg Low
7°C
Rainy Days
8
70mm total
Sunshine
7.5h
Daily avg
Humidity
60%
Comfortable
UV Index
6
High
Wind
13 km/h
Gusts 25
Crowds
Very busy
At attractions
April Sunrise & Sunset
Air Quality
PM2.5
32 μg/m³
PM10
50 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
18°C
Nighttime
6°C
Humidity and wind affect how the actual temperature feels.
Wind
13 km/h
Max gust 25 km/h
Activities Recommended for April
April Travel Pros & Cons
Pros
- Peak cherry blossom season — once-in-a-lifetime visual
- Mild walking weather (15-22°C)
- Outdoor café and Han River park season begins
Cons
- Most expensive month for hotels and flights
- Cherry blossom spots extremely crowded weekends
- K-Pop event week hotel surges (variable)
April Events & Festivals
- Cherry blossom peak (April 5-15)
- Yeouido Cherry Blossom Festival (early-to-mid April)
- Spring Buddhist lantern festival begins (varies)
- K-Pop event season (concerts, fan meetings increase)
Seoul in April — Full Picture
April is Seoul's peak season — cherry blossoms in full bloom. Yeouido Park (Yunjungno Road), Seokchon Lake, Children's Grand Park (1,400+ trees), and Bukhansan National Park all reach maximum bloom in early-to-mid April.
Yeouido Cherry Blossom Festival (early-to-mid April) is THE event. The 5km Yunjungno Road becomes pedestrian-only for the festival; nighttime illumination of cherry blossoms is genuinely magical. Free entry; food trucks and cultural performances throughout.
Weather is mild (15-22°C / 59-72°F daytime) and dry — ideal for walking. Outdoor cafés and Han River parks all reopen. Late April begins the K-Pop event season — many fan meetings, concerts, and showcases happen.
The trade-off is crowds and prices. Hotels are 50-100% above normal, often fully booked. Cherry blossom spots are extremely crowded weekends. Yeouido Park weekend gets 1+ million visitors. Book everything 6-8 weeks ahead.
Day trips to Nami Island (Winter Sonata K-drama) and Jeonju Hanok Village (3h KTX) are at peak. Cherry blossom photography from N Seoul Tower is also iconic.
What to Wear & What to Pack
Light layers — sweater + light jacket. Sunscreen for outdoor walks. Folding umbrella for spring showers.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current17.3°C
7°C
8/mo
Summer (Jun·Jul·Aug)
29.7°C
20.7°C
13.3/mo
Autumn (Sep·Oct·Nov)
19°C
9.3°C
7.3/mo
Winter (Dec·Jan·Feb)
3.7°C
-4.7°C
5.3/mo
Seoul Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 2° | -6° | 6d·21mm | 5.5h | 60% | 2 | Quiet | Low season | |
| 5° | -4° | 5d·23mm | 6h | 58% | 3 | Quiet | Low season | |
| 11° | 1° | 7d·49mm | 7h | 58% | 4 | Moderate | Shoulder | |
| April (Best) | 18° | 7° | 8d·70mm | 7.5h | 60% | 6 | Very busy | Peak |
| May (Best) | 23° | 13° | 9d·105mm | 8h | 64% | 8 | Busy | Peak |
| 28° | 18° | 10d·130mm | 7.5h | 70% | 9 | Moderate | Shoulder | |
| 30° | 22° | 16d·405mm | 4.5h | 78% | 9 | Moderate | Shoulder | |
| 31° | 22° | 14d·290mm | 5.5h | 75% | 9 | Busy | Peak | |
| 27° | 17° | 10d·165mm | 6.5h | 72% | 7 | Busy | Peak | |
| October (Best) | 19° | 9° | 6d·50mm | 7h | 65% | 5 | Very busy | Peak |
| 11° | 2° | 6d·50mm | 6h | 65% | 3 | Moderate | Shoulder | |
| 4° | -4° | 5d·22mm | 5h | 65% | 2 | Moderate | Shoulder |
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Seoul April Hotel Picks
Frequently Asked Questions
Is April a good time to visit Seoul?
Seoul in April is Excellent. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Seoul in April?
Seoul April averages a high of 18°C and a low of 7°C.
Does it rain much in Seoul in April?
Seoul April averages 70mm of rainfall over about 8 rainy days.
What should I wear in Seoul in April?
Light layers — sweater + light jacket. Sunscreen for outdoor walks. Folding umbrella for spring showers.
What time are sunrise and sunset in Seoul in April?
Seoul April sunrise is 05:55 and sunset is 19:00, with 13h 05m of daylight.
What's the air quality like in Seoul in April?
Seoul April air quality (AQI) averages 75, rated Moderate. PM2.5 averages 32μg/m³.
What activities are recommended in Seoul in April?
In April, Seoul is great for Yeouido Cherry Blossom Festival, Hanbok at Gyeongbokgung, Han River park picnics.
Is April peak season in Seoul?
Seoul April crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Seoul
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.