Gangwon-do · South Korea · 38.11° N · 127.71° E
Solar position in Hwacheon
Sun position, daylight and the best solar panel angle for Hwacheon — computed for 38.11° N, 127.71° E, 115 m above sea level.
The sun right now
Sun in Hwacheon today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:18 | sun 18° below horizon |
| Nautical dawn | 05:49 | 12° below |
| Civil dawn | 06:20 | 6° below |
| Sunrise | 06:47 | 105° ESE |
| Golden hour ends | 07:23 | sun 6° up |
| Solar noon | 12:13 | 39.8° high |
| Golden hour starts | 17:02 | sun 6° up |
| Sunset | 17:38 | 255° WSW |
| Civil dusk | 18:05 | 6° below |
| Nautical dusk | 18:36 | 12° below |
| Astronomical dusk | 19:07 | 18° below |
| Day length | 10 h 51 min | |
Sun path diagram for Hwacheon
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 75.3° at solar noon in Hwacheon; on the December solstice only 28.5°. Sunrise swings from 59° ENE in June to 120° ESE in December — a 61° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 07:41 | 12:40 | 17:39 | 9 h 57 min | 32.0° |
| February | 07:12 | 12:43 | 18:13 | 11 h 01 min | 41.3° |
| March | 06:31 | 12:36 | 18:41 | 12 h 10 min | 52.1° |
| April | 05:46 | 12:28 | 19:10 | 13 h 24 min | 63.7° |
| May | 05:14 | 12:25 | 19:37 | 14 h 23 min | 72.1° |
| June | 05:06 | 12:30 | 19:55 | 14 h 49 min | 75.3° |
| July | 05:22 | 12:35 | 19:48 | 14 h 26 min | 72.4° |
| August | 05:48 | 12:32 | 19:15 | 13 h 26 min | 64.0° |
| September | 06:15 | 12:22 | 18:28 | 12 h 13 min | 52.6° |
| October | 06:43 | 12:13 | 17:43 | 11 h 01 min | 41.2° |
| November | 07:16 | 12:14 | 17:13 | 9 h 58 min | 32.0° |
| December | 07:41 | 12:27 | 17:12 | 9 h 31 min | 28.5° |
A year of daylight in Hwacheon
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Hwacheon
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
37°collects the most energy over a year: 1372 kWh per kWp.
28°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1146 | 84% | 3.20 | 2.5× |
| 15° | 1289 | 94% | 3.22 | 1.8× |
| 28° off-grid best | 1357 | 99% | 3.11 | 1.4× |
| 30° | 1363 | 99% | 3.09 | 1.4× |
| 37° year-round best | 1372 | 100% | 2.97 | 1.5× |
| 38° = latitude | 1372 | 100% | 2.95 | 1.5× |
| 45° | 1362 | 99% | 2.80 | 1.6× |
| 60° | 1288 | 94% | 2.38 | 1.8× |
| 70° | 1200 | 87% | 2.05 | 2.1× |
| 90° | 949 | 69% | 1.32 | 2.9× |
A fixed array in Hwacheon produces the most over a year at 37°. The design month for an off-grid system is July: at 28° it makes 3.11 kWh per kWp a day, 5% more than at 37°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Hwacheon at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 37° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 37° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.38 | 4.34 | 4.01 | 3.57 | -5.9 °C |
| February snow | 3.17 | 4.66 | 4.26 | 4.07 | -3.1 °C |
| March | 4.14 | 4.29 | 3.84 | 4.38 | 2.2 °C |
| April | 4.90 | 3.83 | 3.34 | 4.37 | 8.5 °C |
| May | 5.48 | 3.46 | 2.93 | 4.30 | 14.9 °C |
| June | 5.17 | 3.04 | 2.51 | 3.81 | 19.8 °C |
| July | 4.02 | 2.53 | 2.05 | 2.97 | 22.7 °C |
| August | 4.17 | 2.99 | 2.44 | 3.31 | 23.2 °C |
| September | 3.98 | 3.60 | 3.02 | 3.65 | 18.2 °C |
| October | 3.48 | 4.28 | 3.70 | 3.93 | 11.6 °C |
| November | 2.43 | 3.90 | 3.47 | 3.33 | 4.0 °C |
| December snow | 2.15 | 4.31 | 3.95 | 3.43 | -3.7 °C |
| Year | 3.79 avg | 3.76 avg | 1200 kWh | 1372 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 580 Wp of panels at 70°, versus 400 Wp at 37°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Hwacheon
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
4.7 mrow pitch at 70°
4.1 mrow pitch at 37°
How Hwacheon compares in South Korea
Against the other 144 places in South Korea with climate data, for a fixed array at its best angle.
142ndof 145 places in South Korea for sunshine: 3.79 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in South Korea: 1,372 against 1,356 kWh per kWp.
+3 mindaylight on the longest day, compared with Seoul: 14 h 49 min against 14 h 46 min.
37°best year-round tilt here; across South Korea it runs from 27° in Seogwipo to 37° in Uijeongbu-si.
Of the 145 places in South Korea, Tongyeong gets the most sun (4.04 peak sun hours a day) and Kosong the least (3.76); Hwacheon ranks 142nd. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.05 kWh a day here, against 2.12 kWh on average in South Korea. The shortest day lasts 9 h 31 min, −3 min compared with Seoul.
Solar forecast for Hwacheon, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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A free, live card for Hwacheon: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.