Suwon weather in May

In May, Suwon sees average daytime highs of 23°C and overnight lows near 12°C, with 88 mm of rain across 7.1 wet days and about 14 hours of daylight. It is the 5th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 24°C by the end. The sky is clear or mostly clear about 41% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 24 min by month's end. Set against the rest of the year, May is Suwon's 8th-clearest and 6th-windiest month. For the whole year in context, see Suwon's year-round climate.

Daytime high
23°
5th warmest
Overnight low
12°
8th coldest
Rainfall
88 mm
7.1 wet days
Daylight
14 hours
5:28 AM – 7:28 PM
Cloud cover
52%
8th clearest
Wind
10 km/h
6th windiest
Solar energy
5.85 kWh/m²
Travel score
7.3
out of 10

Suwon is capital of Gyeonggi-do, South Korea.

Density
10,195/km²
people per km²

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 24°C by the end.

A typical May day in Suwon reaches about 23°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 27°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12110
22110
32110
42110
52111
62111
72111
82211
92211
102211
112212
122212
132212
142212
152212
162312
172312
182313
192313
202313
212313
222313
232413
242414
252414
262414
272414
282414
292514
302515
312515

How May really feels in Suwon

Once humidity and wind are folded in, May 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

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

Suwon weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -6°213.82.39.70.0
Feb / -4°274.11.710.60.3
Mar11° / 396.1111.72.9
Apr17° / 697.1012.95.9
May23° / 12°887.10147.3
Jun26° / 18°1187.6014.56.8
Jul28° / 22°27915.3014.35.1
Aug29° / 22°23114013.45.0
Sep26° / 17°1247.8012.37.0
Oct20° / 10°555.20117.2
Nov12° / 477.30.3103.5
Dec / -4°235.11.69.50.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25347
35347
45347
55248
65248
75248
85248
95347
105347
115347
125347
135446
145446
155347
165446
175446
185446
195545
205545
215644
225644
235644
245644
255644
265644
275644
285545
295446
305446
315347

Chance of precipitation in May

Any precipitation

Suwon gets around 88 mm of rain over 7.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 26% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
224
324
424
524
624
725
825
925
1025
1125
1225
1326
1426
1525
1625
1725
1825
1925
2024
2124
2223
2323
2422
2521
2621
2720
2820
2919
3019
3119

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 71% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1881020
2871120
3871120
4861220
5851320
6851320
7841420
8831520
9831520
10821620
11821620
12811720
13801820
14781930
15772030
16762130
17742240
18722350
19712450
20692560
21672670
22652870
23632980
24613090
255931100
265633110
275334130
285135140
294836160
304537181
314238201

Wind in May

Winds average 10 km/h in May.

Across May, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 5:44 AM to 5:19 AM, and sunset from 7:15 PM to 7:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:447:15
213.55:437:16
313.65:417:16
413.65:407:17
513.75:397:18
613.75:387:19
713.75:377:20
813.85:367:21
913.85:357:22
1013.85:347:23
1113.85:337:24
1213.95:327:25
1313.95:317:25
1413.95:307:26
1514.05:297:27
1614.05:287:28
1714.05:287:29
1814.15:277:30
1914.15:267:31
2014.15:257:31
2114.15:247:32
2214.25:247:33
2314.25:237:34
2414.25:227:35
2514.25:227:35
2614.25:217:36
2714.35:217:37
2814.35:207:38
2914.35:207:39
3014.35:197:39
3114.45:197:40

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.85 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 5.85 kWh/m² in May across the year — May's 5.85 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.9Bright
205.9Bright
215.9Bright
226.0Bright
236.0Bright
246.0Bright
256.0Intense
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Hazard calendar for Suwon

In seasonPeak

In May, Suwon sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

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

Suwon's rainy season runs July–August, 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 May a good time to visit Suwon?

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

7.3
Sightseeing
1st-best month of the year
5.4
Beach & pool
5th-best month of the year

May is one of the better times to visit Suwon for general sightseeing.

What to pack for Suwon in May

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

In May, Suwon sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes and sun protection. About 7 days see rain.

light clothessun protection

Sea temperature near Suwon in May

The nearest coast averages about 12°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 35 km away) is warmest in August at about 24°C and coldest in February near 4°C.

It's comfortable for a long swim from Jul 11 to Oct 13 — 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
Jun17Cool
Jul21Refreshing
Aug24Refreshing
Sep23Refreshing
Oct20Cool
Nov15Bracing
Dec10Bracing

UV index in Suwon in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Suwon peaks around August 11 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateAug 11UV 8Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun7High
Jul8Very high
Aug8Very high
Sep7Very high
Oct5Moderate
Nov3Moderate
Dec2Low

Air quality in Suwon in May

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Suwon is worst in March — around 160 µg/m³ PM2.5 (very unhealthy), about 2.0× the cleanest month (August, 81 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyVery unhealthyUnhealthyMar 13158 µg/m³Aug 1282 µg/m³
PM2.5 (µg/m³)Level
Jan145Unhealthy
Feb149Unhealthy
Mar160Very unhealthy
Apr127Unhealthy
May111Unhealthy
Jun98Unhealthy
Jul88Unhealthy
Aug81Unhealthy
Sep110Unhealthy
Oct132Unhealthy
Nov142Unhealthy
Dec133Unhealthy
Location & terrain

Where is Suwon?

Suwon sits at 37.3°N, 127.0°E, 58 m above sea level, in South Korea. The nearest listed city is Uiwang, 10 km away.

Topography around Suwon

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

Within 3 km, the terrain around Suwon has only modest variations in elevation — a maximum elevation change of 224 m around an average of 70 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 602 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,218 m.

The land around Suwon is covered by artificial surfaces (66%) and trees (26%) within 3 km, trees (51%) and artificial surfaces (35%) within 16 km, and trees (48%) within 80 km.

3 km
224 m
16 km
602 m
80 km
1,218 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Uiwang 10 km · Gunpo 10 km · Anyang-si 13 km · Osan 16 km · Ansan 17 km · Hwaseong-si 19 km · Siheungdong 20 km · Seongnam-si 20 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 Suwon (37.2911°, 127.0089°, elevation 58 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).