South Korea Seoul Weather in July — Climate Guide
July in Seoul is Below Average
Seoul Weather in July — Quick Answer
As of 2026- Avg temp
- 30° / 22°
- Rainfall
- 405mm · 16 days
- Crowds
- Moderate
As of 2026, Seoul in July averages a high of 30°C and low of 22°C with 405mm of rain over about 16 days. Light tropical-style clothing. Quick-dry fabrics recommended. Folding umbrella mandatory — monsoon (jangma) season.
July is Below Average for Seoul.
July is Seoul's monsoon (jangma) peak — 405mm cumulative rainfall over 16 rainy days, the wettest month by a wide margin. Don't expect non-stop rain — most days have 1-2 hour heavy showers, often in the afternoon, with humid clouds the rest of the day. Folding umbrella mandatory.
Despite the rain, July has its own atmosphere. Crowds drop noticeably as Western tourists avoid the monsoon. Hotel prices return to off-peak levels — central Seoul 4-star hotels at $70-110/night vs $150-200 in spring.
Travel score
Monsoon + heat wave — year's #1 hotel value window
July Weather at a Glance
July is hot, humid, and wet — average highs 86°F / 30°C, lows 72°F / 22°C, rainy season July 1-20. 16 rainy days, 350mm rainfall (the year's wettest, 4x normal). Felt temperature 95°F+ / 35°C+. After monsoon ends late month, full summer heat hits.
July Travel Advice
Waterproof jacket + folding umbrella + light cotton + walking shoes + SPF 50. Indoor venues (Seoul City Hall, Myeongdong, Gangnam underground arcades, COEX Mall, Lotte World Adventure) save the day during downpours. Han River outdoor pools open July 1-August 31.
Flying In from Overseas
Korean workers go on domestic vacation (Busan, Gangwon, Jeju) while Seoul itself empties out. International travelers also dodge monsoon — round-trip from Tokyo $250-450. Best hotel value window of the year.
July Pricing Trends
Year's best hotel value: Gangnam 4-star $100-170/night. Myeongdong and Hongdae $70-120. Only Han River-view hotels see modest uptick.
Seoul July Weather Stats
Avg High
30°C
Avg Low
22°C
Rainy Days
16
405mm total
Sunshine
4.5h
Daily avg
Humidity
78%
Very humid
UV Index
9
Very high
Wind
11 km/h
Gusts 20
Crowds
Moderate
At attractions
July Sunrise & Sunset
Air Quality
PM2.5
21 μg/m³
PM10
32 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
35°C
Nighttime
23°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 20 km/h
Activities Recommended for July
July Travel Pros & Cons
Pros
- Hotel prices off-peak (deep monsoon discount)
- Boryeong Mud Festival — fun and uniquely Korean
- Indoor K-culture experiences peak
Cons
- Wettest month of the year (405mm rainfall)
- Monsoon disrupts outdoor plans
- Late month school holiday crowds at theme parks
July Events & Festivals
- Jangma (monsoon) season — heaviest rainfall of the year
- Boryeong Mud Festival (3h from Seoul) — mid-July
- Korean summer school holidays begin late July
Seoul in July — Full Picture
July is Seoul's monsoon (jangma) peak — 405mm cumulative rainfall over 16 rainy days, the wettest month by a wide margin. Don't expect non-stop rain — most days have 1-2 hour heavy showers, often in the afternoon, with humid clouds the rest of the day. Folding umbrella mandatory.
Despite the rain, July has its own atmosphere. Crowds drop noticeably as Western tourists avoid the monsoon. Hotel prices return to off-peak levels — central Seoul 4-star hotels at $70-110/night vs $150-200 in spring.
Boryeong Mud Festival (3h from Seoul, mid-July, 9 days) is one of Korea's most fun festivals — Korean tourists and international visitors alike participate in mud wrestling, mud pools, mud baths. Day-trip-able from Seoul via KTX + bus, but better as overnight.
Korean summer school holidays begin late July (typically July 20-August 25). Domestic family travel surges — Lotte World Theme Park, Everland, Caribbean Bay water park all hit maximum capacity. Hotels in Gangwon-do (mountains) and Jeju become harder to book.
In Seoul itself, indoor culture peaks. K-Beauty shopping at Olive Young Myeongdong. Korean spa days at Spa Lei or 7Luck. Indoor cafés (concept cafés like the cafe-with-cat-cat-cat-cat) become refuges. Han River park visits limited to dry windows.
What to Wear & What to Pack
Light tropical-style clothing. Quick-dry fabrics recommended. Folding umbrella mandatory — monsoon (jangma) season.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
17.3°C
7°C
8/mo
Summer (Jun·Jul·Aug)
Current29.7°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 |
View Other Months
Seoul July Hotel Picks
Frequently Asked Questions
Is July a good time to visit Seoul?
Seoul in July is Below Average. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Seoul in July?
Seoul July averages a high of 30°C and a low of 22°C.
Does it rain much in Seoul in July?
Seoul July averages 405mm of rainfall over about 16 rainy days.
What should I wear in Seoul in July?
Light tropical-style clothing. Quick-dry fabrics recommended. Folding umbrella mandatory — monsoon (jangma) season.
What time are sunrise and sunset in Seoul in July?
Seoul July sunrise is 05:18 and sunset is 19:55, with 14h 37m of daylight.
What's the air quality like in Seoul in July?
Seoul July air quality (AQI) averages 50, rated Good. PM2.5 averages 21μg/m³.
What activities are recommended in Seoul in July?
In July, Seoul is great for Boryeong Mud Festival, K-Beauty shopping, Korean spa days (jjimjilbang).
Is July peak season in Seoul?
Seoul July crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Seoul
View Other Months
Planning a July trip to Seoul?
You've checked the weather — next come the budget and the route.
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.