Sejong weather in July

In July, Sejong sees average daytime highs of 29°C and overnight lows near 22°C, with 256 mm of rain across 16.1 wet days and about 14.2 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 31°C by the end. The sky is clear or mostly clear about 16% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 30 min at the start of July to 13 h 54 min by month's end. Set against the rest of the year, July is Sejong's 12th-clearest and 5th-windiest month. For the whole year in context, see Sejong's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
22°
11th coldest
Rainfall
256 mm
16.1 wet days
Daylight
14 h 18 min
5:28 AM – 7:45 PM
Cloud cover
74%
12th clearest
Wind
9 km/h
5th windiest
Solar energy
4.52 kWh/m²
Travel score
4.5
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 31°C by the end.

A typical July day in Sejong reaches about 29°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, July runs about 1°C warmer than June and on par with August.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92921
102922
112922
122922
132922
142922
152922
162922
172922
182922
193023
203023
213023
223023
233023
243023
253023
263023
273023
283123
293123
303123
313124

How July really feels in Sejong

Once humidity and wind are folded in, July averages 14 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
14
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Sejong weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 71%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12773
22674
32575
42575
52575
62575
72575
82575
92575
102575
112575
122674
132674
142674
152674
162674
172773
182773
192971
202971
212971
223070
233268
243268
253268
263466
273466
283466
293664
303664
313763

Chance of precipitation in July

Any precipitation

Sejong gets around 256 mm of rain over 16.1 wet days in July, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 51% and peaks near 54% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
146
247
348
449
550
651
751
852
952
1053
1153
1253
1353
1453
1554
1654
1754
1853
1953
2053
2152
2252
2351
2451
2550
2650
2750
2849
2949
3049
3149

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 89% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1272142270
2172043291
3161843321
4161643341
5051543361
6051442371
7041342392
8041241402
9041241422
10031140433
11031039453
12031038463
1303937484
1402836504
1502734525
1602733535
1702631556
1801630567
1901529587
2001427608
2101426609
22013246210
23013236211
24013216312
25012206314
26012196315
27012186316
28012176218
29002166319
30002166220
31002156320

Wind in July

Winds average 9 km/h in July.

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

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 30 min at the start of July to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 5:20 AM to 5:39 AM, and sunset from 7:48 PM to 7:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:207:48
214.55:207:48
314.55:217:48
414.45:217:48
514.45:227:48
614.45:227:48
714.45:237:48
814.45:237:47
914.45:247:47
1014.45:247:47
1114.45:257:47
1214.35:267:46
1314.35:267:46
1414.35:277:46
1514.35:287:45
1614.35:287:45
1714.35:297:44
1814.25:307:44
1914.25:307:43
2014.25:317:43
2114.25:327:42
2214.15:327:41
2314.15:337:41
2414.15:347:40
2514.15:357:39
2614.05:367:39
2714.05:367:38
2814.05:377:37
2914.05:387:36
3013.95:397:35
3113.95:397:34

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.52 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 — July's 4.52 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in July

Hazard calendar for Sejong

In seasonPeak

In July, 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 July a good time to visit Sejong?

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

4.5
Sightseeing
6th-best month of the year
5.8
Beach & pool
5th-best month of the year

July is a reasonable time to visit Sejong for sightseeing.

What to pack for Sejong in July

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

In July, Sejong sees daytime highs around 29°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 16 days see rain.

light clothesrain gearsun protection

UV index in Sejong in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 8 (very high — sun protection essential). 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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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
July 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).