South Pyongan · North Korea · 39.75° N · 126.26° E
Solar position in Tŏkch’ŏn
Sun position, daylight and the best solar panel angle for Tŏkch’ŏn — computed for 39.75° N, 126.26° E, 113 m above sea level.
The sun right now
Sun in Tŏkch’ŏn today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:24 | sun 18° below horizon |
| Nautical dawn | 05:56 | 12° below |
| Civil dawn | 06:27 | 6° below |
| Sunrise | 06:55 | 105° ESE |
| Golden hour ends | 07:32 | sun 6° up |
| Solar noon | 12:18 | 38.2° high |
| Golden hour starts | 17:04 | sun 6° up |
| Sunset | 17:42 | 255° WSW |
| Civil dusk | 18:09 | 6° below |
| Nautical dusk | 18:41 | 12° below |
| Astronomical dusk | 19:12 | 18° below |
| Day length | 10 h 47 min | |
Sun path diagram for Tŏkch’ŏn
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 73.7° at solar noon in Tŏkch’ŏn; on the December solstice only 26.8°. Sunrise swings from 58° ENE in June to 120° ESE in December — a 62° 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 | 07:51 | 12:46 | 17:41 | 9 h 49 min | 30.4° |
| February | 07:20 | 12:48 | 18:17 | 10 h 57 min | 39.7° |
| March | 06:37 | 12:42 | 18:47 | 12 h 10 min | 50.5° |
| April | 05:49 | 12:33 | 19:18 | 13 h 29 min | 62.1° |
| May | 05:15 | 12:31 | 19:47 | 14 h 32 min | 70.4° |
| June | 05:07 | 12:36 | 20:06 | 14 h 59 min | 73.7° |
| July | 05:23 | 12:41 | 19:58 | 14 h 35 min | 70.7° |
| August | 05:52 | 12:38 | 19:23 | 13 h 31 min | 62.4° |
| September | 06:21 | 12:27 | 18:34 | 12 h 13 min | 51.0° |
| October | 06:51 | 12:19 | 17:47 | 10 h 57 min | 39.6° |
| November | 07:25 | 12:20 | 17:15 | 9 h 50 min | 30.4° |
| December | 07:52 | 12:32 | 17:13 | 9 h 21 min | 26.8° |
A year of daylight in Tŏkch’ŏn
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 Tŏkch’ŏn
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
39°collects the most energy over a year: 1425 kWh per kWp.
35°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° | 1164 | 82% | 3.40 | 2.7× |
| 15° | 1323 | 93% | 3.44 | 1.9× |
| 30° | 1410 | 99% | 3.31 | 1.5× |
| 35° off-grid best | 1422 | 100% | 3.22 | 1.5× |
| 39° year-round best | 1425 | 100% | 3.15 | 1.5× |
| 40° = latitude | 1425 | 100% | 3.12 | 1.5× |
| 45° | 1420 | 100% | 3.01 | 1.6× |
| 60° | 1353 | 95% | 2.57 | 1.8× |
| 70° | 1268 | 89% | 2.21 | 2.0× |
| 90° | 1015 | 71% | 1.43 | 2.9× |
A fixed array in Tŏkch’ŏn produces the most over a year at 39°. The design month for an off-grid system is July: at 35° it makes 3.22 kWh per kWp a day, 2% more than at 39°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Tŏkch’ŏn at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 39° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 39° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.40 | 4.64 | 4.35 | 3.87 | -9.5 °C |
| February snow | 3.16 | 4.82 | 4.46 | 4.25 | -6.1 °C |
| March snow | 4.23 | 4.84 | 4.37 | 4.72 | 0.1 °C |
| April | 4.92 | 3.97 | 3.48 | 4.46 | 7.1 °C |
| May | 5.51 | 3.56 | 3.02 | 4.33 | 14.1 °C |
| June | 5.17 | 3.10 | 2.56 | 3.80 | 19.2 °C |
| July | 4.25 | 2.71 | 2.21 | 3.15 | 21.9 °C |
| August | 4.36 | 3.19 | 2.62 | 3.49 | 21.8 °C |
| September | 4.24 | 4.02 | 3.40 | 4.03 | 16.8 °C |
| October | 3.39 | 4.39 | 3.82 | 4.01 | 9.7 °C |
| November | 2.28 | 3.86 | 3.48 | 3.32 | 1.1 °C |
| December snow | 2.02 | 4.27 | 3.97 | 3.46 | -7.3 °C |
| Year | 3.83 avg | 3.94 avg | 1268 kWh | 1425 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 530 Wp of panels at 70°, versus 380 Wp at 39°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Tŏkch’ŏn
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.
5.0 mrow pitch at 70°
4.4 mrow pitch at 39°
How Tŏkch’ŏn compares in North Korea
Against the other 96 places in North Korea with climate data, for a fixed array at its best angle.
65thof 97 places in North Korea for sunshine, shared: 3.83 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in North Korea: 1,425 against 1,424 kWh per kWp.
+5 mindaylight on the longest day, compared with Pyongyang: 14 h 59 min against 14 h 55 min.
39°best year-round tilt here; across North Korea it runs from 34° in Ongjin to 44° in Namyang-nodongjagu.
Of the 97 places in North Korea, Sinp’o and one other place get the most sun (3.91 peak sun hours a day) and Ŏrang and one other place the least (3.70); Tŏkch’ŏn ranks joint 65th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.21 kWh a day here, against 2.28 kWh on average in North Korea. The shortest day lasts 9 h 21 min, −4 min compared with Pyongyang.
Solar forecast for Tŏkch’ŏn, 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 Tŏkch’ŏn
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Places near Tŏkch’ŏn
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A free, live card for Tŏkch’ŏn: 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.