Daejeon, South Korea — Weather in May 2027

Monthly climate averages for Daejeon, South Korea. Based on 10-year ERA5 reanalysis data.

Cfa Humid Subtropical
8.3 /10
Excellent

May is an excellent month in Daejeon

Climate Overview

Daejeon, South Korea in May has warm conditions, with highs averaging 23.8°C (75°F). Temperatures drop noticeably between day and night.

This month falls at the end of Spring.

Daily highs in May gradually rise from around 22°C (71°F) at the start to 26°C (79°F) by month's end.

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

Expect around 9.8h of sunshine at the start of May, increasing to 10.6h by the end.

Wind speeds ease off through the month, from 17 km/h (11 mph) to 14 km/h (8 mph).

The warmest days tend to fall around the 31th, averaging 26.4°C (80°F).

Compared to April, this month is about 5°C warmer with 1 more rainy days. Temperatures will rise further into June.

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Monthly May Averages

Temperature
24°C / 13°C
Feels Like
24°C / 12°C
Rain
8 days · 85 mm
Sunshine
10h / day
Humidity
66% — Humid
Wind
15 km/h
Wind Direction
SW (235°)
Gusts
37 km/h
Daylight
14.1 h
Cloud Cover
57%
Clear Sky Days
6
UV Index
6.2 — High
Dew Point
12°C — Comfortable
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 28°C 24°C 20°C 16°C 12°C 8°C 4°C 151015202531
High Low

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 8 mm 151015202531
Rainfall

Daily Sunshine

0h 3h 6h 9h 12h 151015202531
Sunshine

Daily Wind Speed

0 5 10 15 20 25 151015202531
Wind Speed
Sun Position
Sunrise 05:24
Daylight 14.1h
Sunset 19:30

What to Expect

Daytime temperatures around 24°C (75°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

Recent yearly records for May have stayed close to the long-run average.

Compare Months

January
Poor
Temp
4°C / -4°C
Feels Like
-1°C / -8°C
Rain
5days (24 mm) Good
Sun
7.6h Good
Humidity
63% Muggy
UV
2.9 Moderate
Snow Days
6days
View Details
February
Poor
Temp
6°C / -2°C
Feels Like
2°C / -6°C
Rain
5days (36 mm) Good
Sun
8.3h Good
Humidity
61% Muggy
UV
3.5 Moderate
Snow Days
4days
View Details
March
Fair
Temp
13°C / 3°C
Feels Like
10°C / -1°C
Rain
8days (52 mm) Wet
Sun
8.9h Good
Humidity
64% Muggy
UV
5 Moderate
Snow Days
2days
View Details
April best
Good
Temp
19°C / 8°C
Feels Like
17°C / 6°C
Rain
7days (69 mm) Good
Sun
9.4h Good
Humidity
63% Muggy
UV
5.9 High
View Details
May best
Excellent
Temp
24°C / 13°C
Feels Like
24°C / 12°C
Rain
8days (85 mm) Wet
Sun
10h Excellent
Humidity
66% Muggy
UV
6.2 High
View Details
June best
Excellent
Temp
28°C / 19°C
Feels Like
30°C / 20°C
Rain
9days (125 mm) Wet
Sun
9.8h Good
Humidity
70% Muggy
UV
7 High
View Details
July
Wet
Temp
30°C / 23°C
Feels Like
34°C / 27°C
Rain
15days (240 mm) Wet
Sun
8.2h Good
Humidity
82% Humid
UV
6.4 High
View Details
August
Fair
Temp
31°C / 23°C
Feels Like
35°C / 27°C
Rain
13days (175 mm) Wet
Sun
9.1h Good
Humidity
79% Humid
UV
6.6 High
View Details
September best
Excellent
Temp
26°C / 18°C
Feels Like
28°C / 20°C
Rain
10days (167 mm) Wet
Sun
7.8h Good
Humidity
78% Humid
UV
5.2 High
View Details
October best
Good
Temp
20°C / 11°C
Feels Like
19°C / 10°C
Rain
7days (84 mm) Good
Sun
7.9h Good
Humidity
74% Muggy
UV
4.1 Moderate
View Details
November
Fair
Temp
13°C / 4°C
Feels Like
10°C / 1°C
Rain
5days (40 mm) Good
Sun
7.7h Good
Humidity
71% Muggy
UV
3.3 Moderate
Snow Days
1days
View Details
December
Poor
Temp
5°C / -2°C
Feels Like
1°C / -6°C
Rain
4days (29 mm) Good
Sun
7.4h Good
Humidity
67% Muggy
UV
2.6 Moderate
Snow Days
4days
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
January 4°C / -4°C -1°C / -8°C 5days (24 mm) Good 7.6h Good 63% Muggy 2.9 Moderate Poor View Details
February 6°C / -2°C 2°C / -6°C 5days (36 mm) Good 8.3h Good 61% Muggy 3.5 Moderate Poor View Details
March 13°C / 3°C 10°C / -1°C 8days (52 mm) Wet 8.9h Good 64% Muggy 5 Moderate Fair View Details
April best 19°C / 8°C 17°C / 6°C 7days (69 mm) Good 9.4h Good 63% Muggy 5.9 High Good View Details
May best 24°C / 13°C 24°C / 12°C 8days (85 mm) Wet 10h Excellent 66% Muggy 6.2 High Excellent View Details
June best 28°C / 19°C 30°C / 20°C 9days (125 mm) Wet 9.8h Good 70% Muggy 7 High Excellent View Details
July 30°C / 23°C 34°C / 27°C 15days (240 mm) Wet 8.2h Good 82% Humid 6.4 High Wet View Details
August 31°C / 23°C 35°C / 27°C 13days (175 mm) Wet 9.1h Good 79% Humid 6.6 High Fair View Details
September best 26°C / 18°C 28°C / 20°C 10days (167 mm) Wet 7.8h Good 78% Humid 5.2 High Excellent View Details
October best 20°C / 11°C 19°C / 10°C 7days (84 mm) Good 7.9h Good 74% Muggy 4.1 Moderate Good View Details
November 13°C / 4°C 10°C / 1°C 5days (40 mm) Good 7.7h Good 71% Muggy 3.3 Moderate Fair View Details
December 5°C / -2°C 1°C / -6°C 4days (29 mm) Good 7.4h Good 67% Muggy 2.6 Moderate Poor View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

Temperatures drop significantly at night, so pack layers you can add or remove throughout the day.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaSunscreen (SPF 30+)SunglassesComfortable walking shoes

Frequently Asked Questions

May is typically excellent for visiting Daejeon, with average highs of 24°C (75°F) and around 8 rainy days. Daejeon, South Korea in May has warm conditions, with highs averaging 23.8°C (75°F). Temperatures drop noticeably betwee
Daejeon typically sees around 8 rainy days in May with 85 mm (3.3 in) of total rainfall. An umbrella should suffice.
Evenings in Daejeon during May are mild at 13°C (55°F). A light cardigan is usually enough.
With highs of 24°C (75°F) and lows of 13°C (55°F) in May, we recommend: Umbrella, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. Comfortable walking shoes are essential.
Yes, May offers some of the best weather conditions in Daejeon with comfortable temperatures and lower chances of rain.
The average UV index in Daejeon during May is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.
Daejeon gets approximately 14 hours of daylight per day in May, with around 10 hours of sunshine.
Snow is uncommon in Daejeon during May based on 10-year climate averages.

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