Sejong weather in June

In June, Sejong sees average daytime highs of 28°C and overnight lows near 18°C, with 122 mm of rain across 8.5 wet days and about 14.5 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 25% of the time in June, and the air most often feels humid.

Daylight stretches from about 14 h 18 min at the start of June to 14 h 30 min by month's end. Set against the rest of the year, June is Sejong's 10th-clearest and 11th-windiest month. For the whole year in context, see Sejong's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
122 mm
8.5 wet days
Daylight
14 h 30 min
5:17 AM – 7:46 PM
Cloud cover
66%
10th clearest
Wind
8 km/h
11th windiest
Solar energy
5.61 kWh/m²
Travel score
6.1
out of 10

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical June day in Sejong reaches about 28°C in the afternoon and slips back to 18°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, June runs about 4°C warmer than May and about 1°C cooler than July.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12716
22716
32716
42716
52716
62817
72817
82817
92817
102817
112818
122818
132818
142818
152818
162818
172818
182819
192819
202819
212819
222819
232819
242820
252820
262820
272820
282820
292820
302820

How June really feels in Sejong

Once humidity and wind are folded in, June averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sejong weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°224.32.29.80.0
Feb / -3°304.31.510.60.7
Mar12° / 496.71.111.73.6
Apr19° / 797.4012.96.5
May24° / 13°867.5013.97.2
Jun28° / 18°1228.5014.56.1
Jul29° / 22°25616.1014.24.5
Aug30° / 22°22615013.44.4
Sep26° / 17°1438.5012.26.8
Oct20° / 10°584.8011.17.4
Nov13° / 435.90.2104.0
Dec / -3°234.51.49.50.5

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 15% of June, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
24951
34951
44852
54753
64654
74555
84555
94456
104357
114258
124258
134159
144159
154060
164060
174060
183862
193763
203763
213565
223565
233268
243268
253169
263070
273070
282971
292872
302773

Chance of precipitation in June

Any precipitation

Sejong gets around 122 mm of rain over 8.5 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
121
221
321
422
522
623
723
823
924
1024
1124
1224
1325
1425
1526
1626
1727
1828
1928
2029
2131
2232
2334
2436
2537
2639
2741
2842
2943
3045

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

Most of June feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, June lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 24% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
152321510
249331720
346341820
443342020
540352230
637362340
734362540
831362750
928362960
1026363171
1123363381
1221353591
13183437111
14173238121
15153139141
16142940161
17122841182
18112641202
19102441223
2092241244
2182040275
2271839297
2361738319
24515363311
25413343513
26412323715
27311303818
28310283920
2929254123
3028234125

Wind in June

Winds average 8 km/h in June.

Across June, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
279calm
289calm
299calm
309calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 18 min at the start of June to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 5:19 AM to 5:20 AM, and sunset from 7:38 PM to 7:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.35:197:38
214.35:197:38
314.35:187:39
414.45:187:40
514.45:187:40
614.45:187:41
714.45:177:41
814.45:177:42
914.45:177:42
1014.45:177:43
1114.45:177:43
1214.55:177:44
1314.55:177:44
1414.55:167:45
1514.55:167:45
1614.55:177:46
1714.55:177:46
1814.55:177:46
1914.55:177:47
2014.55:177:47
2114.55:177:47
2214.55:177:47
2314.55:177:48
2414.55:187:48
2514.55:187:48
2614.55:187:48
2714.55:197:48
2814.55:197:48
2914.55:197:48
3014.55:207:48

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 5.61 kWh/m².

For context, solar energy here swings from a low near 2.3 kWh/m² to a high of 5.89 kWh/m² in May across the year — June's 5.61 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.0Intense
66.0Intense
76.0Intense
86.0Bright
96.0Bright
105.9Bright
115.9Bright
125.9Bright
135.8Bright
145.8Bright
155.7Bright
165.7Bright
175.6Bright
185.6Bright
195.5Bright
205.4Bright
215.3Bright
225.3Bright
235.2Bright
245.1Bright
255.0Bright
264.9Bright
274.9Bright
284.8Bright
294.7Bright
304.7Bright
Planning a trip in June

Hazard calendar for Sejong

In seasonPeak

In June, Sejong sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Sejong's rainy season runs June–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is June a good time to visit Sejong?

Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.1
Sightseeing
5th-best month of the year
6.8
Beach & pool
1st-best month of the year

June is a reasonable time to visit Sejong for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sejong in June

From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In June, Sejong sees daytime highs around 28°C and nights near 18°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Sejong in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sejong peaks around August 14 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 14UV 8Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr6High
May7High
Jun7Very high
Jul8Very high
Aug8Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Sejong in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Sejong is worst in March — around 80 µg/m³ PM2.5 (unhealthy), about 1.8× the cleanest month (July, 45 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1479 µg/m³Jul 2345 µg/m³
PM2.5 (µg/m³)Level
Jan69Unhealthy
Feb72Unhealthy
Mar80Unhealthy
Apr65Unhealthy
May58Unhealthy
Jun54Poor
Jul45Poor
Aug45Poor
Sep56Unhealthy
Oct67Unhealthy
Nov72Unhealthy
Dec65Unhealthy
Location & terrain

Where is Sejong?

Sejong sits at 36.6°N, 127.3°E, 49 m above sea level, in South Korea. The nearest listed city is Cheongju-si, 18 km away.

Seonghwan

Topography around Sejong

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sejong.

Within 3 km, the terrain around Sejong has only modest variations in elevation — a maximum elevation change of 148 m around an average of 39 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 445 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,213 m.

The land around Sejong is covered by cropland (43%), artificial surfaces (28%) and trees (21%) within 3 km, trees (54%) and cropland (22%) within 16 km, and trees (62%) and cropland (23%) within 80 km.

3 km
148 m
16 km
445 m
80 km
1,213 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Cheongju-si 18 km · Gongju 21 km · Cheonan 27 km · Daejeon 28 km · Chinch'ŏn 32 km · Asan 33 km · Jungpyong 34 km · Seonghwan 39 km

South Korea travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
220 V · 60 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$36,227
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.5
per 100k, 2023
Road deaths
8.6
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 522
Religion
none 60%Protestant 17%Buddhist 16%Catholic 6%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sejong (36.5924°, 127.2922°, elevation 49 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).