Kangwŏn-do · North Korea · 39.15° N · 127.44° E
Solar position in Wŏnsan
Sun position, daylight and the best solar panel angle for Wŏnsan — computed for 39.15° N, 127.44° E, 7 m above sea level.
The sun right now
Sun in Wŏnsan today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:20 | sun 18° below horizon |
| Nautical dawn | 05:51 | 12° below |
| Civil dawn | 06:22 | 6° below |
| Sunrise | 06:49 | 105° ESE |
| Golden hour ends | 07:26 | sun 6° up |
| Solar noon | 12:14 | 38.8° high |
| Golden hour starts | 17:01 | 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 49 min | |
Sun path diagram for Wŏnsan
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 74.3° at solar noon in Wŏnsan; on the December solstice only 27.4°. 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 | 07:45 | 12:41 | 17:37 | 9 h 52 min | 31.0° |
| February | 07:14 | 12:44 | 18:13 | 10 h 59 min | 40.3° |
| March | 06:32 | 12:37 | 18:42 | 12 h 10 min | 51.1° |
| April | 05:45 | 12:29 | 19:13 | 13 h 27 min | 62.7° |
| May | 05:12 | 12:26 | 19:41 | 14 h 29 min | 71.0° |
| June | 05:04 | 12:31 | 19:59 | 14 h 56 min | 74.3° |
| July | 05:20 | 12:36 | 19:52 | 14 h 31 min | 71.3° |
| August | 05:48 | 12:33 | 19:17 | 13 h 29 min | 63.0° |
| September | 06:16 | 12:23 | 18:29 | 12 h 13 min | 51.6° |
| October | 06:45 | 12:14 | 17:43 | 10 h 58 min | 40.2° |
| November | 07:19 | 12:15 | 17:12 | 9 h 53 min | 31.0° |
| December | 07:45 | 12:28 | 17:10 | 9 h 25 min | 27.4° |
A year of daylight in Wŏnsan
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 Wŏnsan
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: 1399 kWh per kWp.
31°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° | 1147 | 82% | 3.34 | 2.6× |
| 15° | 1302 | 93% | 3.38 | 1.8× |
| 30° | 1386 | 99% | 3.24 | 1.4× |
| 31° off-grid best | 1389 | 99% | 3.22 | 1.4× |
| 39° year-round best = latitude | 1399 | 100% | 3.08 | 1.5× |
| 45° | 1393 | 100% | 2.94 | 1.5× |
| 60° | 1323 | 95% | 2.50 | 1.8× |
| 70° | 1237 | 88% | 2.15 | 2.1× |
| 90° | 983 | 70% | 1.38 | 2.9× |
A fixed array in Wŏnsan produces the most over a year at 39°. The design month for an off-grid system is July: at 31° it makes 3.22 kWh per kWp a day, 5% more than at 39°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Wŏnsan 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 | 2.35 | 4.52 | 4.16 | 3.72 | -4.9 °C |
| February snow | 3.17 | 4.83 | 4.41 | 4.21 | -2.5 °C |
| March | 4.19 | 4.48 | 4.01 | 4.52 | 2.4 °C |
| April | 5.01 | 4.00 | 3.49 | 4.49 | 8.4 °C |
| May | 5.48 | 3.51 | 2.97 | 4.28 | 14.8 °C |
| June | 5.11 | 3.03 | 2.50 | 3.73 | 19.7 °C |
| July | 4.18 | 2.64 | 2.15 | 3.08 | 22.6 °C |
| August | 4.21 | 3.05 | 2.50 | 3.34 | 23.2 °C |
| September | 3.99 | 3.71 | 3.11 | 3.71 | 18.8 °C |
| October | 3.41 | 4.34 | 3.74 | 3.95 | 12.6 °C |
| November | 2.38 | 4.01 | 3.56 | 3.41 | 4.8 °C |
| December snow | 2.12 | 4.52 | 4.13 | 3.60 | -2.7 °C |
| Year | 3.80 avg | 3.88 avg | 1237 kWh | 1399 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 550 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 Wŏnsan
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.
4.9 mrow pitch at 70°
4.3 mrow pitch at 39°
How Wŏnsan compares in North Korea
Against the other 96 places in North Korea with climate data, for a fixed array at its best angle.
75thof 97 places in North Korea for sunshine, shared: 3.80 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in North Korea: 1,399 against 1,424 kWh per kWp.
+1 mindaylight on the longest day, compared with Pyongyang: 14 h 56 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); Wŏnsan ranks joint 75th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.15 kWh a day here, against 2.28 kWh on average in North Korea. The shortest day lasts 9 h 25 min, −1 min compared with Pyongyang.
Solar forecast for Wŏnsan, 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 Wŏnsan
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Places near Wŏnsan
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A free, live card for Wŏnsan: 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.