January 2° · ☂ 3 February 5° · ☂ 3 March 12° · ☂ 5 April 18° · ☂ 7 ★ May23° · ☂ 7 June 28° · ☂ 7 July 30° · ☂ 14 August 30° · ☂ 11 ★ September27° · ☂ 7 October 20° · ☂ 6 November 12° · ☂ 6 December 4° · ☂ 5 Seoul in May:warm, occasional rain Seoul, South Korea · Records from 2006 to 2025. Not a forecast.
Mean high 23° Hottest day 32.1° (2014)
Mean low 14° Coldest night 5.2° (2010)
Rain days 7 days 2-15 by year
Rainfall 105mm Daylight 13.7 → 14.6 h
Seoul's 12 months i Best: May and September
1 2 3 4 5 6 7 8 9 10 11 12
Trip types Sightseeing on foot Goodmild
Humidity 68% 0 muggy days
Clear days 8 days 9 overcast days
Mean wind 9 km/h Rarely windy
Sunrise / sunset (15th) 05:23 / 19:33 Daylight 13.7 → 14.6 h
Seoul in May The sun is stronger but the air is not yet sticky, so palace grounds and the Han River parks are pleasant to walk. Buddha's Birthday (8th day of the 4th lunar month) usually falls in May, and on a Saturday evening before it the lantern parade runs from Heunginjimun to Jonggak. Jongno is closed to cars that night.
Daytime highs averaged 23°C, with nights at 14°C. Comfortably warm without being punishing. Out of 31 days, about 7 brought rain; the rest stayed dry. Year to year it swung widely, from 2 rain days in 2022 to 15 in 2021.
With up to 14.6 hours of daylight, dinner plans could still start in the light. Wet days did not mess around: about 15 mm each, the kind of rain that drives you into a doorway.
How long it rained On a rainy day it rained for about 6.1 hours. Rain came at any time of day.
0 3 6 9 12 15 18 21
Typhoons i Typhoons: July to October
Date by date i Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Saturday 1 rain in 3 of 20 yrs 3/20 22° 11° May 1 rain on 15% of days 22° 11°
May 2 Sunday 2 rain in 5 of 20 yrs 5/20 23° 11° May 3 Monday 3 rain in 5 of 20 yrs 5/20 22° 12° May 4 Tuesday 4 rain in 2 of 20 yrs 2/20 23° 12° May 5 Wednesday 5 rain in 6 of 20 yrs 6/20 22° 12° May 6 Thursday 6 rain in 7 of 20 yrs 7/20 21° 11° May 7 Friday 7 rain in 4 of 20 yrs 4/20 22° 12° May 8 Saturday 8 rain in 4 of 20 yrs 4/20 23° 12° 2-8 rain on 24% of days 22° 12°
May 9 Sunday 9 rain in 6 of 20 yrs 6/20 23° 12° May 10 Monday 10 rain in 6 of 20 yrs 6/20 21° 13° May 11 Tuesday 11 rain in 5 of 20 yrs 5/20 23° 13° May 12 Wednesday 12 rain in 6 of 20 yrs 6/20 21° 13° May 13 Thursday 13 rain in 4 of 20 yrs 4/20 23° 13° May 14 Friday 14 rain in 2 of 20 yrs 2/20 23° 13° May 15 Saturday 15 rain in 6 of 20 yrs 6/20 23° 13° 9-15 rain on 25% of days 22° 13°
May 16 Sunday 16 rain in 6 of 20 yrs 6/20 23° 14° May 17 Monday 17 rain in 5 of 20 yrs 5/20 24° 13° May 18 Tuesday 18 rain in 6 of 20 yrs 6/20 24° 14° May 19 Wednesday 19 rain in 7 of 20 yrs 7/20 23° 14° May 20 Thursday 20 rain in 3 of 20 yrs 3/20 24° 14° May 21 Friday 21 rain in 4 of 20 yrs 4/20 24° 14° May 22 Saturday 22 rain in 3 of 20 yrs 3/20 25° 15° 16-22 rain on 24% of days 24° 14°
May 23 Sunday 23 rain in 3 of 20 yrs 3/20 25° 15° May 24 Monday 24 rain in 5 of 20 yrs 5/20 25° 15° May 25 Tuesday 25 rain in 4 of 20 yrs 4/20 24° 15° May 26 Wednesday 26 rain in 2 of 20 yrs 2/20 25° 15° May 27 Thursday 27 rain in 5 of 20 yrs 5/20 24° 15° May 28 Friday 28 rain in 5 of 20 yrs 5/20 25° 16° May 29 Saturday 29 rain in 2 of 20 yrs 2/20 25° 16° 23-29 rain on 19% of days 25° 15°
May 30 Sunday 30 rain in 3 of 20 yrs 3/20 25° 16° May 31 Monday 31 rain in 2 of 20 yrs 2/20 26° 16°
30-31 rain on 13% of days 26° 16°
May 1 rain on 15% of days 22° 11° 2-8 rain on 24% of days 22° 12° 9-15 rain on 25% of days 22° 13° 16-22 rain on 24% of days 24° 14° 23-29 rain on 19% of days 25° 15° 30-31 rain on 13% of days 26° 16°
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
May 1 Monday 1 rain in 3 of 20 yrs 3/20 22° 11° May 2 Tuesday 2 rain in 5 of 20 yrs 5/20 23° 11° May 3 Wednesday 3 rain in 5 of 20 yrs 5/20 22° 12° May 4 Thursday 4 rain in 2 of 20 yrs 2/20 23° 12° May 5 Friday 5 rain in 6 of 20 yrs 6/20 22° 12° May 6 Saturday 6 rain in 7 of 20 yrs 7/20 21° 11° 1-6 rain on 23% of days 22° 12°
May 7 Sunday 7 rain in 4 of 20 yrs 4/20 22° 12° May 8 Monday 8 rain in 4 of 20 yrs 4/20 23° 12° May 9 Tuesday 9 rain in 6 of 20 yrs 6/20 23° 12° May 10 Wednesday 10 rain in 6 of 20 yrs 6/20 21° 13° May 11 Thursday 11 rain in 5 of 20 yrs 5/20 23° 13° May 12 Friday 12 rain in 6 of 20 yrs 6/20 21° 13° May 13 Saturday 13 rain in 4 of 20 yrs 4/20 23° 13° 7-13 rain on 25% of days 22° 12°
May 14 Sunday 14 rain in 2 of 20 yrs 2/20 23° 13° May 15 Monday 15 rain in 6 of 20 yrs 6/20 23° 13° May 16 Tuesday 16 rain in 6 of 20 yrs 6/20 23° 14° May 17 Wednesday 17 rain in 5 of 20 yrs 5/20 24° 13° May 18 Thursday 18 rain in 6 of 20 yrs 6/20 24° 14° May 19 Friday 19 rain in 7 of 20 yrs 7/20 23° 14° May 20 Saturday 20 rain in 3 of 20 yrs 3/20 24° 14° 14-20 rain on 25% of days 23° 14°
May 21 Sunday 21 rain in 4 of 20 yrs 4/20 24° 14° May 22 Monday 22 rain in 3 of 20 yrs 3/20 25° 15° May 23 Tuesday 23 rain in 3 of 20 yrs 3/20 25° 15° May 24 Wednesday 24 rain in 5 of 20 yrs 5/20 25° 15° May 25 Thursday 25 rain in 4 of 20 yrs 4/20 24° 15° May 26 Friday 26 rain in 2 of 20 yrs 2/20 25° 15° May 27 Saturday 27 rain in 5 of 20 yrs 5/20 24° 15° 21-27 rain on 19% of days 25° 15°
May 28 Sunday 28 rain in 5 of 20 yrs 5/20 25° 16° May 29 Monday 29 rain in 2 of 20 yrs 2/20 25° 16° May 30 Tuesday 30 rain in 3 of 20 yrs 3/20 25° 16° May 31 Wednesday 31 rain in 2 of 20 yrs 2/20 26° 16°
28-31 rain on 15% of days 25° 16°
1-6 rain on 23% of days 22° 12° 7-13 rain on 25% of days 22° 12° 14-20 rain on 25% of days 23° 14° 21-27 rain on 19% of days 25° 15° 28-31 rain on 15% of days 25° 16°
Tap another date to change
2006 88mm
2007 none
2008 none
2009 none
2010 15mm
2011 3mm
2012 none
2013 none
2014 none
2015 none
2016 3mm
2017 none
2018 13mm
2019 none
2020 none
2021 none
2022 none
2023 42mm
2024 6mm
2025 none
Holidays in May (2027) May 1 Labour DayMay 5 Children's DayMay 13 Buddha's BirthdayMay 31 Memorial Day 1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)
Day by day temperature i 10° 18° 26° 34° 1 8 15 22 29 31
Your trip dates, the past 20 years Trip dates May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) ~ May 1 (Sat) 2 (Sun) 3 (Mon) 4 (Tue) 5 (Wed) 6 (Thu) 7 (Fri) 8 (Sat) 9 (Sun) 10 (Mon) 11 (Tue) 12 (Wed) 13 (Thu) 14 (Fri) 15 (Sat) 16 (Sun) 17 (Mon) 18 (Tue) 19 (Wed) 20 (Thu) 21 (Fri) 22 (Sat) 23 (Sun) 24 (Mon) 25 (Tue) 26 (Wed) 27 (Thu) 28 (Fri) 29 (Sat) 30 (Sun) 31 (Mon) 1-7 8-14 15-21 22-end Whole month
You can also click two dates on the axis. Hover a cell to see that day's rain. By year Driest trips first
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Trip rain days Month rain days 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 Dates outside your trip are dimmed.
One row per year, one cell per day. 2022 had 2 rain days, 2021 had 15.
Common questions Does it rain a lot in Seoul in May? Over the past 20 years May averaged 7 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 Seoul in May? Days averaged 23°C and nights 14°C. Pack a compact umbrella, a light layer for the evenings, and T-shirts.
Is May a good time to visit Seoul? On warmth and rain days alone, Seoul's easiest months were May and September. May ranked first of 12.
How many clear days does Seoul get in May? About 8 clear days (under 30% cloud on average) and 9 overcast days (80% or more).
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