Chungcheongnam-do · South Korea · 36.78° N · 127.00° E
Solar position in Asan
Sun position, daylight and the best solar panel angle for Asan — computed for 36.78° N, 127.00° E, 27 m above sea level.
The sun right now
Sun in Asan today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:21 | sun 18° below horizon |
| Nautical dawn | 05:51 | 12° below |
| Civil dawn | 06:21 | 6° below |
| Sunrise | 06:48 | 104° ESE |
| Golden hour ends | 07:24 | sun 6° up |
| Solar noon | 12:15 | 41.2° high |
| Golden hour starts | 17:07 | sun 6° up |
| Sunset | 17:43 | 255° WSW |
| Civil dusk | 18:09 | 6° below |
| Nautical dusk | 18:40 | 12° below |
| Astronomical dusk | 19:10 | 18° below |
| Day length | 10 h 55 min | |
Sun path diagram for Asan
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 76.7° at solar noon in Asan; on the December solstice only 29.8°. Sunrise swings from 60° ENE in June to 119° ESE in December — a 60° 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 | 12:43 | 17:45 | 10 h 04 min | 33.3° |
| February | 07:13 | 12:45 | 18:17 | 11 h 04 min | 42.7° |
| March | 06:34 | 12:39 | 18:44 | 12 h 09 min | 53.4° |
| April | 05:50 | 12:30 | 19:11 | 13 h 21 min | 65.1° |
| May | 05:20 | 12:28 | 19:37 | 14 h 17 min | 73.4° |
| June | 05:13 | 12:33 | 19:54 | 14 h 41 min | 76.7° |
| July | 05:28 | 12:38 | 19:47 | 14 h 19 min | 73.7° |
| August | 05:53 | 12:35 | 19:16 | 13 h 22 min | 65.3° |
| September | 06:18 | 12:25 | 18:31 | 12 h 12 min | 54.0° |
| October | 06:44 | 12:16 | 17:48 | 11 h 04 min | 42.6° |
| November | 07:15 | 12:17 | 17:19 | 10 h 04 min | 33.3° |
| December | 07:40 | 12:29 | 17:19 | 9 h 38 min | 29.8° |
A year of daylight in Asan
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 Asan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
34°collects the most energy over a year: 1358 kWh per kWp.
37°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1166 | 86% | 1.77 | 2.6× |
| 15° | 1296 | 95% | 2.40 | 1.9× |
| 30° | 1355 | 100% | 2.91 | 1.5× |
| 34° year-round best | 1358 | 100% | 3.01 | 1.5× |
| 37° off-grid best = latitude | 1357 | 100% | 3.08 | 1.4× |
| 45° | 1339 | 99% | 3.24 | 1.5× |
| 60° | 1252 | 92% | 3.39 | 1.7× |
| 70° | 1156 | 85% | 3.38 | 1.9× |
| 90° | 893 | 66% | 3.09 | 2.6× |
A fixed array in Asan produces the most over a year at 34°. The design month for an off-grid system is December: at 37° it makes 3.08 kWh per kWp a day, 2% more than at 34°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Asan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 34° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.39 | 4.09 | 3.73 | 3.30 | -2.5 °C |
| February snow | 3.19 | 4.30 | 3.89 | 3.85 | -0.4 °C |
| March | 4.27 | 4.33 | 3.85 | 4.43 | 3.9 °C |
| April | 5.01 | 3.83 | 3.32 | 4.44 | 9.9 °C |
| May | 5.56 | 3.43 | 2.89 | 4.38 | 15.8 °C |
| June | 5.15 | 2.98 | 2.45 | 3.83 | 20.8 °C |
| July | 4.21 | 2.60 | 2.10 | 3.14 | 23.9 °C |
| August | 4.44 | 3.11 | 2.52 | 3.52 | 24.8 °C |
| September | 4.10 | 3.63 | 3.02 | 3.71 | 20.2 °C |
| October | 3.58 | 4.24 | 3.64 | 3.89 | 14.0 °C |
| November | 2.49 | 3.72 | 3.28 | 3.16 | 6.9 °C |
| December snow | 2.12 | 3.73 | 3.38 | 3.01 | -0.2 °C |
| Year | 3.88 avg | 3.66 avg | 1156 kWh | 1358 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 560 Wp of panels at 70°, versus 390 Wp at 34°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Asan
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.
4.4 mrow pitch at 70°
3.9 mrow pitch at 34°
How Asan compares in South Korea
Against the other 144 places in South Korea with climate data, for a fixed array at its best angle.
78thof 145 places in South Korea for sunshine, shared: 3.88 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in South Korea: 1,358 against 1,356 kWh per kWp.
−5 mindaylight on the longest day, compared with Seoul: 14 h 41 min against 14 h 46 min.
34°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); Asan ranks joint 78th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.10 kWh a day here, against 2.12 kWh on average in South Korea. The shortest day lasts 9 h 38 min, +4 min compared with Seoul.
Solar forecast for Asan, 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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Questions about the sun in Asan
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Places near Asan
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A free, live card for Asan: 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.