yearsofweather

Jeju in July:
hot, rain here and there

Jeju, South Korea · Records from 2006 to 2025. Not a forecast.

Mean high30°Hottest day 34.5° (2017)
Mean low24°Coldest night 17.9° (2015)
Rain days9 days2-15 by year
Rainfall201mmDaylight 14.3 → 13.8 h
Jeju's 12 months iBest: May, June and October
Trip types Beach Finecool sea and storm riskSightseeing on foot Finemuggy and storm risk
Humidity87%30 muggy days
Clear days3 days16 overcast days
Mean wind12 km/hRarely windy
Sea temperature25°21.4-26.6° by year (last 6)
Sunrise / sunset (15th)05:35 / 19:45Daylight 14.3 → 13.8 h

Jeju in July

In an average year the rainy season clears around July 20, and hot, humid midsummer follows. The standard beach opening date used to be July 1. Some years bring a typhoon past the island in July too. This is the main summer holiday season in Korea, so book flights and rooms early.

Days averaged 30°C and nights 24°C. Midday was for air conditioning, a cold drink or a long lunch out of the sun. Out of 31 days, about 9 brought rain; the rest stayed dry. Year to year it swung widely, from 2 rain days in 2013 to 15 in 2020.

14 days past 30°C made it a month for early starts and a long lunch indoors. Each rainy day brought about 23 mm, closer to downpours than drizzle.

How long it rained

On a rainy day it rained for about 6.1 hours. Rain came at any time of day.

Typhoons i

7 of the last 20 years had a tropical storm pass within 300 km this month.

  • Ewiniar (2006), 38 km away tropical storm
  • Khanun (2012), 40 km away tropical storm
  • Danas (2019), 123 km away tropical storm
1 2 3 4 5 16 77 108 89 410 111 12

Date by date i

‹ June July 2027 August ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-3rain on 43% of days28° 22°
4-10rain on 36% of days28° 23°
11-17rain on 34% of days29° 24°
18-24rain on 25% of days30° 25°
25-31rain on 15% of days31° 25°

0-5/206-8/209-11/2012-20/20

1-3rain on 43% of days28° 22°
4-10rain on 36% of days28° 23°
11-17rain on 34% of days29° 24°
18-24rain on 25% of days30° 25°
25-31rain on 15% of days31° 25°
Tap another date to change

20062mm
20077mm
2008none
2009none
20103mm
2011none
201237mm
2013none
20141mm
2015none
20165mm
20173mm
20186mm
2019none
202061mm
202122mm
2022none
202347mm
2024none
2025none
Holidays in July (2027)
  • July 17 to July 19 Constitution Day long weekend
  • July 19 Substitute holiday (Constitution Day)
  • July 3 to July 5 Independence Day weekend

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Day by day temperature i

21°26°31°36° 1815222931

Mean high Mean low Coldest to warmest high in 20 years

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
4 d 12 d
2007
7 d 12 d
2008
0 d 3 d
2009
3 d 14 d
2010
1 d 10 d
2011
4 d 9 d
2012
2 d 12 d
2013
1 d 2 d
2014
3 d 10 d
2015
3 d 8 d
2016
1 d 9 d
2017
3 d 7 d
2018
1 d 4 d
2019
2 d 8 d
2020
5 d 15 d
2021
4 d 7 d
2022
1 d 7 d
2023
4 d 14 d
2024
1 d 11 d
2025
0 d 5 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
10
5
11
6
6
8
5
8
6
11
11
7
9
3
8
5
4
8
5
3
4
6
5
4
3
5
5
4
1
1
2
Rain days on trip
47031421331312541410

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2013 had 2 rain days, 2020 had 15.

Jeju through the year

MonthHighLowRain daysRainfallSea
January 9°4°8 days59mm 16°
February 10°4°8 days67mm 15°
March 14°7°8 days85mm 14°
April 18°11°8 days89mm 15°
MayGood 22°15°7 days93mm 17°
JuneGood 25°19°9 days161mm 21°
July 30°24°9 days201mm 25°
August 30°25°10 days254mm 28°
September 27°21°10 days290mm 27°
OctoberGood 22°16°6 days107mm 23°
November 17°11°8 days90mm 20°
December 11°6°9 days54mm 17°

Common questions

Does it rain a lot in Jeju in July?

Over the past 20 years July averaged 9 rain days (1 mm or more) out of 31. Individual years ran from 2 in the driest to 15 in the wettest.

What should I wear in Jeju in July?

Days averaged 30°C and nights 24°C. Pack a compact umbrella, T-shirts, sunscreen plus a hat, a swimsuit, and insect repellent.

Can you swim in Jeju in July?

Sea surface temperature averaged 25°C in July, comfortable for swimming. Year to year it ranged 21.4-26.6°C. Check local flags for waves and jellyfish on the day.

Is July a good time to visit Jeju?

On warmth and rain days alone, Jeju's easiest months were May, June and October. July ranked 6 of 12.

Is Jeju humid in July?

Mean relative humidity was 87%, with about 30 muggy days (dew point of 20°C or more) in the month.