Asan weather in August

In August, Asan sees average daytime highs of 30°C and overnight lows near 22°C, with 234 mm of rain across 15 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 31°C in the first days to 28°C by the end. The sky is clear or mostly clear about 25% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Asan's 11th-clearest and 9th-windiest month. For the whole year in context, see Asan's year-round climate.

Daytime high
30°
1st warmest
Overnight low
22°
12th coldest
Rainfall
234 mm
15 wet days
Daylight
13 h 24 min
5:54 AM – 7:19 PM
Cloud cover
66%
11th clearest
Wind
8 km/h
9th windiest
Solar energy
4.41 kWh/m²
Travel score
4.5
out of 10

Asan is city in South Chungcheong Province, South Korea.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

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

A typical August day in Asan reaches about 30°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 26°C and 33°C. Set against its neighbours, August runs on par with July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93123
103023
113023
123023
133023
143023
153023
163023
173023
183022
193022
202922
212922
222922
232922
242922
252921
262921
272821
282821
292821
302820
312820

How August really feels in Asan

Once humidity and wind are folded in, August averages 20 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
20
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Asan weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -5°214.12.59.80.0
Feb / -3°284.21.710.60.5
Mar11° / 436.11.211.73.3
Apr18° / 717012.96.3
May24° / 13°807.3013.97.3
Jun28° / 18°1218.3014.56.4
Jul29° / 22°25016014.34.5
Aug30° / 22°23415013.44.5
Sep26° / 17°1378.1012.27.0
Oct20° / 10°565.10117.2
Nov12° / 456.20.3103.8
Dec / -3°234.929.50.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34159
44258
54258
64357
74357
84357
94258
104258
114159
124159
134159
144159
154060
164060
174060
184060
193961
204060
214060
224060
234060
244060
254060
264060
273961
284159
294159
304258
314258

Chance of precipitation in August

Any precipitation

Asan gets around 234 mm of rain over 15 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
150
250
350
450
550
650
750
850
950
1050
1149
1249
1349
1449
1548
1648
1748
1848
1948
2048
2148
2247
2347
2447
2546
2645
2745
2844
2943
3042
3141

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 91% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1002145628
2002145628
3002145529
4002145529
5003155329
6003155329
7003165229
8003175228
9003185227
10003195226
11004205224
12004225123
13004235221
14004255219
15014275018
16015285016
17015304915
18016314813
19016334812
20017344711
21028364510
2202837448
2302938437
24131039417
25131240396
26131340375
27141540365
28151740344
29151940323
30162140303
31172339283

Wind in August

Winds average 8 km/h in August.

Across August, 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.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:41 AM to 6:06 AM, and sunset from 7:35 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:417:35
213.95:427:34
313.85:437:33
413.85:437:32
513.85:447:31
613.75:457:30
713.75:467:29
813.75:477:28
913.75:487:27
1013.65:497:26
1113.65:497:25
1213.65:507:23
1313.55:517:22
1413.55:527:21
1513.55:537:20
1613.45:547:19
1713.45:547:17
1813.35:557:16
1913.35:567:15
2013.35:577:13
2113.25:587:12
2213.25:597:11
2313.25:597:09
2413.16:007:08
2513.16:017:07
2613.16:027:05
2713.06:037:04
2813.06:047:02
2912.96:047:01
3012.96:056:59
3112.96:066:58

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.41 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 5.9 kWh/m² in May across the year — August's 4.41 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in August

Hazard calendar for Asan

In seasonPeak

In August, Asan sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Asan sits in the Pacific typhoon belt; the season peaks July–October.

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

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

Is August a good time to visit Asan?

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

4.5
Sightseeing
6th-best month of the year
6.0
Beach & pool
3rd-best month of the year

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

What to pack for Asan in August

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

In August, Asan sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. About 15 days see rain.

light clothesrain gear

Sea temperature near Asan in August

The nearest coast averages about 23°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 51 km away) is warmest in August at about 23°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 12 to Oct 14 — about 3.1 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar5Bracing
Apr8Bracing
May12Bracing
Jun16Cool
Jul21Refreshing
Aug23Refreshing
Sep23Refreshing
Oct20Cool
Nov15Cool
Dec10Bracing

UV index in Asan in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Asan peaks around August 13 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 13UV 8Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug8Very high
Sep7Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Asan in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Asan is worst in March — around 92 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (July, 46 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1391 µg/m³Jul 2246 µg/m³
PM2.5 (µg/m³)Level
Jan83Unhealthy
Feb85Unhealthy
Mar92Unhealthy
Apr75Unhealthy
May62Unhealthy
Jun57Unhealthy
Jul46Poor
Aug47Poor
Sep61Unhealthy
Oct74Unhealthy
Nov79Unhealthy
Dec73Unhealthy
Location & terrain

Where is Asan?

Asan sits at 36.8°N, 127.0°E, 27 m above sea level, in South Korea. The nearest listed city is Cheonan, 13 km away.

AnseongTangjinHongseong

Topography around Asan

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

Within 3 km, the terrain around Asan has only modest variations in elevation — a maximum elevation change of 178 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 689 m; within 80 km, large variations in elevation — a maximum elevation change of 1,006 m.

The land around Asan is covered by artificial surfaces (35%), cropland (34%) and trees (21%) within 3 km, trees (47%) and cropland (26%) within 16 km, and trees (49%) and cropland (22%) within 80 km.

3 km
178 m
16 km
689 m
80 km
1,006 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Cheonan 13 km · Seonghwan 19 km · Yesan 19 km · Pyeongtaek 25 km · Sejong 33 km · Anseong 35 km · Tangjin 36 km · Hongseong 36 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 Asan (36.7836°, 127.0042°, elevation 27 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).