South Hamgyong · North Korea · 40.32° N · 128.66° E
Solar position in Iwŏn-ŭp
Sun position, daylight and the best solar panel angle for Iwŏn-ŭp — computed for 40.32° N, 128.66° E, 2 m above sea level.
The sun right now
Sun in Iwŏn-ŭp today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:15 | sun 18° below horizon |
| Nautical dawn | 05:46 | 12° below |
| Civil dawn | 06:18 | 6° below |
| Sunrise | 06:46 | 105° ESE |
| Golden hour ends | 07:24 | sun 6° up |
| Solar noon | 12:09 | 37.6° high |
| Golden hour starts | 16:54 | sun 6° up |
| Sunset | 17:31 | 255° WSW |
| Civil dusk | 17:59 | 6° below |
| Nautical dusk | 18:31 | 12° below |
| Astronomical dusk | 19:03 | 18° below |
| Day length | 10 h 45 min | |
Sun path diagram for Iwŏn-ŭp
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 73.1° at solar noon in Iwŏn-ŭp; on the December solstice only 26.3°. Sunrise swings from 58° ENE in June to 121° ESE in December — a 63° 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 | 07:43 | 12:36 | 17:30 | 9 h 47 min | 29.8° |
| February | 07:11 | 12:39 | 18:07 | 10 h 56 min | 39.1° |
| March | 06:27 | 12:32 | 18:37 | 12 h 10 min | 49.9° |
| April | 05:39 | 12:24 | 19:09 | 13 h 31 min | 61.5° |
| May | 05:04 | 12:22 | 19:39 | 14 h 35 min | 69.9° |
| June | 04:55 | 12:27 | 19:58 | 15 h 03 min | 73.1° |
| July | 05:12 | 12:31 | 19:50 | 14 h 38 min | 70.2° |
| August | 05:41 | 12:28 | 19:14 | 13 h 33 min | 61.8° |
| September | 06:11 | 12:18 | 18:24 | 12 h 13 min | 50.4° |
| October | 06:42 | 12:09 | 17:37 | 10 h 55 min | 39.0° |
| November | 07:17 | 12:10 | 17:04 | 9 h 47 min | 29.8° |
| December | 07:44 | 12:23 | 17:02 | 9 h 18 min | 26.3° |
A year of daylight in Iwŏn-ŭp
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 Iwŏn-ŭp
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: 1447 kWh per kWp.
41°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° | 1183 | 82% | 1.67 | 2.7× |
| 15° | 1345 | 93% | 2.43 | 2.0× |
| 30° | 1433 | 99% | 3.07 | 1.6× |
| 39° year-round best | 1447 | 100% | 3.38 | 1.4× |
| 40° = latitude | 1447 | 100% | 3.41 | 1.4× |
| 41° off-grid best | 1447 | 100% | 3.44 | 1.4× |
| 45° | 1441 | 100% | 3.54 | 1.4× |
| 60° | 1370 | 95% | 3.81 | 1.6× |
| 70° | 1282 | 89% | 3.87 | 1.9× |
| 90° | 1020 | 70% | 3.70 | 2.7× |
A fixed array in Iwŏn-ŭp produces the most over a year at 39°. The design month for an off-grid system is December: at 41° it makes 3.44 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 Iwŏn-ŭp 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 | 2.26 | 4.40 | 4.04 | 3.60 | -4.6 °C |
| February snow | 3.15 | 4.90 | 4.48 | 4.25 | -3.1 °C |
| March | 4.34 | 4.75 | 4.27 | 4.77 | 1.3 °C |
| April | 5.18 | 4.23 | 3.71 | 4.72 | 7.1 °C |
| May | 5.48 | 3.60 | 3.07 | 4.35 | 13.0 °C |
| June | 5.19 | 3.15 | 2.62 | 3.86 | 17.6 °C |
| July | 4.63 | 2.94 | 2.42 | 3.46 | 20.9 °C |
| August | 4.55 | 3.36 | 2.77 | 3.68 | 21.8 °C |
| September | 4.23 | 4.06 | 3.42 | 4.04 | 17.8 °C |
| October | 3.44 | 4.52 | 3.91 | 4.07 | 12.0 °C |
| November | 2.38 | 4.07 | 3.62 | 3.44 | 4.4 °C |
| December snow | 2.02 | 4.24 | 3.87 | 3.38 | -2.6 °C |
| Year | 3.90 avg | 4.01 avg | 1282 kWh | 1447 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 490 Wp of panels at 70°, versus 350 Wp at 39°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Iwŏn-ŭp
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.
5.1 mrow pitch at 70°
4.5 mrow pitch at 39°
How Iwŏn-ŭp compares in North Korea
Against the other 96 places in North Korea with climate data, for a fixed array at its best angle.
3rdof 97 places in North Korea for sunshine, shared: 3.91 peak sun hours a day on flat ground.
+2%solar energy a year compared with the average place in North Korea: 1,447 against 1,424 kWh per kWp.
+8 mindaylight on the longest day, compared with Pyongyang: 15 h 03 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); Iwŏn-ŭp ranks joint 3rd. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.42 kWh a day here, against 2.28 kWh on average in North Korea. The shortest day lasts 9 h 18 min, −8 min compared with Pyongyang.
Solar forecast for Iwŏn-ŭp, 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 Iwŏn-ŭp
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A free, live card for Iwŏn-ŭp: 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.