Koch'ang weather in May
In May, Koch'ang sees average daytime highs of 22°C and overnight lows near 13°C, with 88 mm of rain across 7.8 wet days and about 13.8 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 37% of the time in May, and the air most often feels dry.
Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Koch'ang's 5th-clearest and 8th-windiest month. For the whole year in context, see Koch'ang's year-round climate.
- Daytime high
- 22°
- 5th warmest
- Overnight low
- 13°
- 8th coldest
- Rainfall
- 88 mm
- 7.8 wet days
- Daylight
- 13 h 54 min
- 5:34 AM – 7:25 PM
- Cloud cover
- 55%
- 5th clearest
- Wind
- 10 km/h
- 8th windiest
- Solar energy
- 5.93 kWh/m²
- Travel score
- 7.1
- out of 10
Koch'ang is human settlement in South Korea.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in May
Highs climb over the month, from about 21°C in the first days to 24°C by the end.
A typical May day in Koch'ang reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, May runs about 5°C warmer than April and about 3°C cooler than June.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| Avg low (°C) | 10 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 20 | 10 |
| 2 | 21 | 11 |
| 3 | 21 | 11 |
| 4 | 21 | 11 |
| 5 | 21 | 11 |
| 6 | 21 | 11 |
| 7 | 21 | 12 |
| 8 | 21 | 12 |
| 9 | 22 | 12 |
| 10 | 22 | 12 |
| 11 | 22 | 12 |
| 12 | 22 | 12 |
| 13 | 22 | 12 |
| 14 | 22 | 13 |
| 15 | 22 | 13 |
| 16 | 22 | 13 |
| 17 | 23 | 13 |
| 18 | 23 | 13 |
| 19 | 23 | 13 |
| 20 | 23 | 13 |
| 21 | 23 | 14 |
| 22 | 23 | 14 |
| 23 | 23 | 14 |
| 24 | 24 | 14 |
| 25 | 24 | 14 |
| 26 | 24 | 14 |
| 27 | 24 | 15 |
| 28 | 24 | 15 |
| 29 | 24 | 15 |
| 30 | 24 | 15 |
| 31 | 24 | 15 |
How May really feels in Koch'ang
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.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Koch'ang 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.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 4° / -3° | 28 | 5.9 | 4.1 | 9.9 | 0.0 |
| Feb | 6° / -2° | 33 | 5.4 | 1.7 | 10.7 | 0.7 |
| Mar | 11° / 2° | 55 | 7.3 | 1 | 11.7 | 3.2 |
| Apr | 17° / 7° | 81 | 7.5 | 0 | 12.9 | 5.9 |
| May | 22° / 13° | 88 | 7.8 | 0 | 13.8 | 7.1 |
| Jun | 26° / 18° | 147 | 9.6 | 0 | 14.3 | 6.6 |
| Jul | 29° / 23° | 238 | 15.6 | 0 | 14.1 | 4.9 |
| Aug | 29° / 23° | 228 | 16 | 0 | 13.3 | 4.6 |
| Sep | 26° / 18° | 150 | 9.5 | 0 | 12.2 | 6.8 |
| Oct | 20° / 11° | 57 | 5.5 | 0 | 11.1 | 7.3 |
| Nov | 14° / 5° | 47 | 6.9 | 0.2 | 10.1 | 4.2 |
| Dec | 7° / -1° | 31 | 6.5 | 2.9 | 9.7 | 0.9 |
Cloud cover in May
The sky is clear or mostly clear about 37% 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 49%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 52 | 51 | 51 | 51 | 50 | 50 | 49 | 50 | 49 | 49 | 48 | 49 | 48 | 49 | 50 | 50 | 51 | 51 | 51 | 51 | 52 | 52 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 51 | 51 |
| Cloudier (%) | 48 | 49 | 49 | 49 | 50 | 50 | 51 | 50 | 51 | 51 | 52 | 51 | 52 | 51 | 50 | 50 | 49 | 49 | 49 | 49 | 48 | 48 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 49 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 52 | 48 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 51 | 49 |
| 5 | 50 | 50 |
| 6 | 50 | 50 |
| 7 | 49 | 51 |
| 8 | 50 | 50 |
| 9 | 49 | 51 |
| 10 | 49 | 51 |
| 11 | 48 | 52 |
| 12 | 49 | 51 |
| 13 | 48 | 52 |
| 14 | 49 | 51 |
| 15 | 50 | 50 |
| 16 | 50 | 50 |
| 17 | 51 | 49 |
| 18 | 51 | 49 |
| 19 | 51 | 49 |
| 20 | 51 | 49 |
| 21 | 52 | 48 |
| 22 | 52 | 48 |
| 23 | 53 | 47 |
| 24 | 53 | 47 |
| 25 | 52 | 48 |
| 26 | 52 | 48 |
| 27 | 52 | 48 |
| 28 | 52 | 48 |
| 29 | 52 | 48 |
| 30 | 51 | 49 |
| 31 | 51 | 49 |
Chance of precipitation in May
Koch'ang gets around 88 mm of rain over 7.8 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 25% and peaks near 29% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 28 | 28 | 28 | 28 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Rain chance (%) | |
|---|---|
| 1 | 28 |
| 2 | 28 |
| 3 | 28 |
| 4 | 28 |
| 5 | 29 |
| 6 | 29 |
| 7 | 28 |
| 8 | 28 |
| 9 | 28 |
| 10 | 28 |
| 11 | 28 |
| 12 | 27 |
| 13 | 27 |
| 14 | 27 |
| 15 | 26 |
| 16 | 26 |
| 17 | 25 |
| 18 | 25 |
| 19 | 24 |
| 20 | 24 |
| 21 | 24 |
| 22 | 23 |
| 23 | 23 |
| 24 | 23 |
| 25 | 22 |
| 26 | 22 |
| 27 | 22 |
| 28 | 22 |
| 29 | 22 |
| 30 | 22 |
| 31 | 22 |
Humidity in May
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 60% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 78 | 78 | 77 | 75 | 75 | 74 | 73 | 73 | 72 | 71 | 70 | 70 | 68 | 67 | 65 | 64 | 62 | 61 | 59 | 56 | 55 | 52 | 50 | 47 | 45 | 42 | 40 | 37 | 34 | 32 | 29 |
| Comfortable (%) | 16 | 16 | 17 | 18 | 18 | 19 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 31 | 32 | 33 | 35 | 36 | 37 | 39 | 39 | 40 | 40 | 40 | 40 |
| Humid (%) | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 17 | 18 | 20 | 22 | 24 | 26 |
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 78 | 16 | 5 | 1 |
| 2 | 78 | 16 | 5 | 1 |
| 3 | 77 | 17 | 5 | 1 |
| 4 | 75 | 18 | 6 | 1 |
| 5 | 75 | 18 | 6 | 1 |
| 6 | 74 | 19 | 6 | 1 |
| 7 | 73 | 20 | 6 | 1 |
| 8 | 73 | 20 | 6 | 1 |
| 9 | 72 | 21 | 6 | 1 |
| 10 | 71 | 21 | 7 | 1 |
| 11 | 70 | 22 | 7 | 1 |
| 12 | 70 | 22 | 7 | 1 |
| 13 | 68 | 23 | 8 | 1 |
| 14 | 67 | 24 | 8 | 1 |
| 15 | 65 | 25 | 9 | 1 |
| 16 | 64 | 26 | 9 | 1 |
| 17 | 62 | 27 | 10 | 1 |
| 18 | 61 | 28 | 10 | 1 |
| 19 | 59 | 29 | 11 | 1 |
| 20 | 56 | 31 | 12 | 1 |
| 21 | 55 | 32 | 12 | 1 |
| 22 | 52 | 33 | 13 | 2 |
| 23 | 50 | 35 | 14 | 2 |
| 24 | 47 | 36 | 14 | 2 |
| 25 | 45 | 37 | 15 | 2 |
| 26 | 42 | 39 | 17 | 3 |
| 27 | 40 | 39 | 18 | 3 |
| 28 | 37 | 40 | 20 | 3 |
| 29 | 34 | 40 | 22 | 4 |
| 30 | 32 | 40 | 24 | 4 |
| 31 | 29 | 40 | 26 | 5 |
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.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 10 | calm |
| 18 | 10 | calm |
| 19 | 10 | calm |
| 20 | 10 | calm |
| 21 | 10 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in May
Daylight runs from about 13 h 24 min at the start of May to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 48 minutes over May. Sunrise moves from 5:48 AM to 5:25 AM, and sunset from 7:13 PM to 7:36 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.6 | 13.7 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 |
| Sunrise (AM) | 5:48 | 5:47 | 5:46 | 5:45 | 5:44 | 5:43 | 5:42 | 5:41 | 5:40 | 5:39 | 5:38 | 5:37 | 5:36 | 5:35 | 5:34 | 5:34 | 5:33 | 5:32 | 5:31 | 5:31 | 5:30 | 5:29 | 5:29 | 5:28 | 5:28 | 5:27 | 5:27 | 5:26 | 5:26 | 5:25 | 5:25 |
| Sunset (PM) | 7:13 | 7:14 | 7:15 | 7:15 | 7:16 | 7:17 | 7:18 | 7:19 | 7:20 | 7:20 | 7:21 | 7:22 | 7:23 | 7:24 | 7:24 | 7:25 | 7:26 | 7:27 | 7:28 | 7:28 | 7:29 | 7:30 | 7:31 | 7:31 | 7:32 | 7:33 | 7:34 | 7:34 | 7:35 | 7:36 | 7:36 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.4 | 5:48 | 7:13 |
| 2 | 13.4 | 5:47 | 7:14 |
| 3 | 13.5 | 5:46 | 7:15 |
| 4 | 13.5 | 5:45 | 7:15 |
| 5 | 13.5 | 5:44 | 7:16 |
| 6 | 13.6 | 5:43 | 7:17 |
| 7 | 13.6 | 5:42 | 7:18 |
| 8 | 13.6 | 5:41 | 7:19 |
| 9 | 13.7 | 5:40 | 7:20 |
| 10 | 13.7 | 5:39 | 7:20 |
| 11 | 13.7 | 5:38 | 7:21 |
| 12 | 13.8 | 5:37 | 7:22 |
| 13 | 13.8 | 5:36 | 7:23 |
| 14 | 13.8 | 5:35 | 7:24 |
| 15 | 13.8 | 5:34 | 7:24 |
| 16 | 13.9 | 5:34 | 7:25 |
| 17 | 13.9 | 5:33 | 7:26 |
| 18 | 13.9 | 5:32 | 7:27 |
| 19 | 13.9 | 5:31 | 7:28 |
| 20 | 14.0 | 5:31 | 7:28 |
| 21 | 14.0 | 5:30 | 7:29 |
| 22 | 14.0 | 5:29 | 7:30 |
| 23 | 14.0 | 5:29 | 7:31 |
| 24 | 14.1 | 5:28 | 7:31 |
| 25 | 14.1 | 5:28 | 7:32 |
| 26 | 14.1 | 5:27 | 7:33 |
| 27 | 14.1 | 5:27 | 7:34 |
| 28 | 14.1 | 5:26 | 7:34 |
| 29 | 14.2 | 5:26 | 7:35 |
| 30 | 14.2 | 5:25 | 7:36 |
| 31 | 14.2 | 5:25 | 7:36 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.93 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 5.93 kWh/m² in May across the year — May's 5.93 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.7 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.9 | 5.9 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.7 | Bright |
| 2 | 5.7 | Bright |
| 3 | 5.7 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.7 | Bright |
| 6 | 5.7 | Bright |
| 7 | 5.7 | Bright |
| 8 | 5.8 | Bright |
| 9 | 5.8 | Bright |
| 10 | 5.8 | Bright |
| 11 | 5.8 | Bright |
| 12 | 5.8 | Bright |
| 13 | 5.8 | Bright |
| 14 | 5.8 | Bright |
| 15 | 5.9 | Bright |
| 16 | 5.9 | Bright |
| 17 | 5.9 | Bright |
| 18 | 5.9 | Bright |
| 19 | 6.0 | Bright |
| 20 | 6.0 | Bright |
| 21 | 6.0 | Intense |
| 22 | 6.0 | Intense |
| 23 | 6.1 | Intense |
| 24 | 6.1 | Intense |
| 25 | 6.1 | Intense |
| 26 | 6.1 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
| 31 | 6.1 | Intense |
Hazard calendar for Koch'ang
In May, Koch'ang sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Koch'ang sits in the Pacific typhoon belt; the season peaks July–October.
Koch'ang's rainy season runs June–September, when most of the year's rain falls.
Is May a good time to visit Koch'ang?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is one of the better times to visit Koch'ang for general sightseeing.
What to pack for Koch'ang in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Koch'ang sees daytime highs around 22°C and nights near 13°C. Worth packing: light clothes and sun protection. About 8 days see rain.
Sea temperature near Koch'ang in May
The nearest coast averages about 14°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 30 km away) is warmest in August at about 25°C and coldest in February near 6°C.
It's comfortable for a long swim from Jun 26 to Oct 11 — about 3.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 8 | 6 | 7 | 10 | 14 | 19 | 23 | 25 | 23 | 19 | 15 | 11 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 8 | Bracing |
| Feb | 6 | Bracing |
| Mar | 7 | Bracing |
| Apr | 10 | Bracing |
| May | 14 | Bracing |
| Jun | 19 | Cool |
| Jul | 23 | Refreshing |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 11 | Bracing |
UV index in Koch'ang in May
Clear-sky midday UV in May 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 Koch'ang peaks around September 12 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 7 | 7 | 8 | 8 | 7 | 8 | 5 | 4 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 7 | High |
| May | 7 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | Very high |
| Sep | 8 | Very high |
| Oct | 5 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Koch'ang in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Koch'ang is worst in March — around 61 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (August, 28 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) | 41 | 48 | 61 | 54 | 45 | 39 | 29 | 28 | 33 | 35 | 38 | 34 |
| Level | Poor | Poor | Unhealthy | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Poor | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 41 | Poor |
| Feb | 48 | Poor |
| Mar | 61 | Unhealthy |
| Apr | 54 | Poor |
| May | 45 | Poor |
| Jun | 39 | Poor |
| Jul | 29 | Moderate |
| Aug | 28 | Moderate |
| Sep | 33 | Moderate |
| Oct | 35 | Moderate |
| Nov | 38 | Poor |
| Dec | 34 | Moderate |
Where is Koch'ang?
Koch'ang sits at 35.4°N, 126.7°E, 44 m above sea level, in South Korea. The nearest listed city is Jangseong, 17 km away.
Topography around Koch'ang
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koch'ang.
Within 3 km, the terrain around Koch'ang has significant variations in elevation — a maximum elevation change of 403 m around an average of 91 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 730 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,720 m.
The land around Koch'ang is covered by trees (48%) and cropland (29%) within 3 km, trees (57%) and cropland (31%) within 16 km, and trees (40%), water (34%) and cropland (21%) 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 Koch'ang (35.4333°, 126.7°, elevation 44 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).