Hwaseong-si in Summer
In summer (June, July and August), Hwaseong-si sees average daytime highs around 24°C and overnight lows near 21°C, with 664 mm of rain over about 35 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 20°C in early June to 26°C by late August. The sky is clear or mostly clear about 30% of the time across summer, and the air most often feels oppressive.
Summer is Hwaseong-si's best season of the year to visit on our travel score. For the whole year in context, see Hwaseong-si's year-round climate.
- Avg daytime high
- 24°C
- warmest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 664 mm
- 35 wet days
- Avg wind
- 12 km/h
- Travel score
- 6.3
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Hwaseong-si in Summer
Over the season highs climb from about 20°C in early June to 26°C by late August.
A typical summer day in Hwaseong-si reaches about 24°C and drops to 21°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Hwaseong-si
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Hwaseong-si weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 2° / -3° | 23 | 4.1 | 2.5 | 9.7 | 0.0 |
| Feb | 3° / -1° | 30 | 4.3 | 1.3 | 10.6 | 0.0 |
| Mar | 7° / 3° | 42 | 6.1 | 0.9 | 11.7 | 1.1 |
| Apr | 12° / 8° | 79 | 7.3 | 0 | 12.9 | 3.6 |
| May | 17° / 13° | 104 | 7.7 | 0 | 14 | 5.9 |
| Jun | 22° / 18° | 127 | 7.6 | 0 | 14.5 | 6.8 |
| Jul | 25° / 22° | 298 | 14.4 | 0 | 14.3 | 6.0 |
| Aug | 27° / 23° | 239 | 12.8 | 0 | 13.4 | 6.2 |
| Sep | 24° / 19° | 127 | 7.3 | 0 | 12.3 | 7.3 |
| Oct | 18° / 13° | 62 | 5.6 | 0 | 11 | 6.7 |
| Nov | 11° / 6° | 57 | 8.2 | 0.3 | 10 | 3.1 |
| Dec | 5° / -0° | 28 | 5.8 | 1.8 | 9.5 | 0.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 30% of the time across summer.
Chance of precipitation in Summer
Hwaseong-si gets around 664 mm of rain over 35 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 12 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 24 min in early June to 12 h 54 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 4.8 kWh/m².
Hazard calendar for Hwaseong-si
In summer, Hwaseong-si overlaps its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Hwaseong-si sits in the Pacific typhoon belt; the season peaks July–October.
Hwaseong-si's rainy season runs July–August, when most of the year's rain falls.
Is summer a good time to visit Hwaseong-si?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Hwaseong-si for sightseeing.
What to pack for Hwaseong-si in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Hwaseong-si sees daytime highs around 24°C and nights near 21°C. Pack rain gear. Worth having: light clothes and sun protection. About 35 days see rain.
Sea temperature near Hwaseong-si in Summer
The nearest coast averages about 20°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 19 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 4 | 5 | 8 | 12 | 16 | 21 | 23 | 23 | 20 | 15 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 4 | Bracing |
| Mar | 5 | Bracing |
| Apr | 8 | Bracing |
| May | 12 | Bracing |
| Jun | 16 | Cool |
| Jul | 21 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 23 | Refreshing |
| Oct | 20 | Cool |
| Nov | 15 | Cool |
| Dec | 10 | Bracing |
UV index in Hwaseong-si in Summer
Clear-sky midday UV across summer averages 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 Hwaseong-si peaks around July 23 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 4 | 6 | 6 | 7 | 8 | 8 | 7 | 5 | 3 | 2 |
| Level | Low | Moderate | Moderate | High | High | High | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 6 | High |
| Jun | 7 | High |
| Jul | 8 | Very high |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 5 | Moderate |
| Nov | 3 | Moderate |
| Dec | 2 | Low |
Air quality in Hwaseong-si in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Hwaseong-si 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 145 | 149 | 160 | 127 | 111 | 98 | 88 | 81 | 110 | 132 | 142 | 133 |
| Level | Unhealthy | Unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 145 | Unhealthy |
| Feb | 149 | Unhealthy |
| Mar | 160 | Very unhealthy |
| Apr | 127 | Unhealthy |
| May | 111 | Unhealthy |
| Jun | 98 | Unhealthy |
| Jul | 88 | Unhealthy |
| Aug | 81 | Unhealthy |
| Sep | 110 | Unhealthy |
| Oct | 132 | Unhealthy |
| Nov | 142 | Unhealthy |
| Dec | 133 | Unhealthy |
Where is Hwaseong-si?
Hwaseong-si sits at 37.2°N, 126.8°E, 19 m above sea level, in South Korea. The nearest listed city is Ansan, 13 km away.
Topography around Hwaseong-si
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hwaseong-si.
Within 3 km, the terrain around Hwaseong-si has only modest variations in elevation — a maximum elevation change of 186 m around an average of 45 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 320 m; within 80 km, large variations in elevation — a maximum elevation change of 1,126 m.
The land around Hwaseong-si is covered by trees (46%) and artificial surfaces (27%) within 3 km, trees (29%), artificial surfaces (25%) and cropland (22%) within 16 km, and trees (39%) and water (27%) within 80 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
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 Hwaseong-si (37.2068°, 126.8169°, elevation 19 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.