North Chungcheong · South Korea · 36.98° N · 127.93° E
Solar position in Chungju
Sun position, daylight and the best solar panel angle for Chungju — computed for 36.98° N, 127.93° E, 85 m above sea level.
The sun right now
Sun in Chungju today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:17 | sun 18° below horizon |
| Nautical dawn | 05:48 | 12° below |
| Civil dawn | 06:18 | 6° below |
| Sunrise | 06:44 | 104° ESE |
| Golden hour ends | 07:20 | sun 6° up |
| Solar noon | 12:12 | 41.0° high |
| Golden hour starts | 17:03 | sun 6° up |
| Sunset | 17:39 | 255° WSW |
| Civil dusk | 18:05 | 6° below |
| Nautical dusk | 18:36 | 12° below |
| Astronomical dusk | 19:06 | 18° below |
| Day length | 10 h 54 min | |
Sun path diagram for Chungju
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 76.5° at solar noon in Chungju; on the December solstice only 29.6°. Sunrise swings from 59° 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 | 07:38 | 12:39 | 17:40 | 10 h 03 min | 33.1° |
| February | 07:10 | 12:42 | 18:14 | 11 h 04 min | 42.5° |
| March | 06:31 | 12:35 | 18:40 | 12 h 09 min | 53.2° |
| April | 05:46 | 12:27 | 19:07 | 13 h 21 min | 64.9° |
| May | 05:16 | 12:24 | 19:33 | 14 h 18 min | 73.2° |
| June | 05:08 | 12:30 | 19:51 | 14 h 42 min | 76.5° |
| July | 05:24 | 12:34 | 19:44 | 14 h 20 min | 73.5° |
| August | 05:49 | 12:31 | 19:12 | 13 h 23 min | 65.2° |
| September | 06:14 | 12:21 | 18:27 | 12 h 13 min | 53.8° |
| October | 06:41 | 12:12 | 17:44 | 11 h 03 min | 42.4° |
| November | 07:12 | 12:13 | 17:15 | 10 h 03 min | 33.2° |
| December | 07:37 | 12:26 | 17:14 | 9 h 37 min | 29.6° |
A year of daylight in Chungju
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 Chungju
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
36°collects the most energy over a year: 1375 kWh per kWp.
29°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° | 1166 | 85% | 3.30 | 2.5× |
| 15° | 1303 | 95% | 3.31 | 1.8× |
| 29° off-grid best | 1367 | 99% | 3.18 | 1.4× |
| 30° | 1369 | 100% | 3.16 | 1.4× |
| 36° year-round best | 1375 | 100% | 3.06 | 1.4× |
| 37° = latitude | 1375 | 100% | 3.04 | 1.4× |
| 45° | 1362 | 99% | 2.86 | 1.5× |
| 60° | 1282 | 93% | 2.42 | 1.8× |
| 70° | 1191 | 87% | 2.08 | 2.0× |
| 90° | 936 | 68% | 1.33 | 2.9× |
A fixed array in Chungju produces the most over a year at 36°. The design month for an off-grid system is July: at 29° it makes 3.18 kWh per kWp a day, 4% more than at 36°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Chungju at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 36° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 36° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.48 | 4.39 | 4.04 | 3.61 | -5.0 °C |
| February snow | 3.24 | 4.65 | 4.23 | 4.06 | -2.2 °C |
| March | 4.21 | 4.26 | 3.81 | 4.38 | 2.9 °C |
| April | 4.94 | 3.80 | 3.30 | 4.37 | 9.4 °C |
| May | 5.56 | 3.45 | 2.91 | 4.34 | 15.8 °C |
| June | 5.17 | 3.01 | 2.47 | 3.80 | 20.7 °C |
| July | 4.14 | 2.57 | 2.08 | 3.06 | 23.5 °C |
| August | 4.30 | 3.03 | 2.47 | 3.39 | 23.8 °C |
| September | 3.96 | 3.49 | 2.93 | 3.58 | 18.7 °C |
| October | 3.54 | 4.21 | 3.64 | 3.90 | 12.0 °C |
| November | 2.53 | 3.89 | 3.46 | 3.34 | 4.6 °C |
| December snow | 2.23 | 4.28 | 3.91 | 3.41 | -2.9 °C |
| Year | 3.86 avg | 3.75 avg | 1191 kWh | 1375 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 570 Wp of panels at 70°, versus 390 Wp at 36°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Chungju
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.
4.5 mrow pitch at 70°
4.0 mrow pitch at 36°
How Chungju compares in South Korea
Against the other 144 places in South Korea with climate data, for a fixed array at its best angle.
99thof 145 places in South Korea for sunshine, shared: 3.86 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in South Korea: 1,375 against 1,356 kWh per kWp.
−4 mindaylight on the longest day, compared with Seoul: 14 h 42 min against 14 h 46 min.
36°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); Chungju ranks joint 99th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.08 kWh a day here, against 2.12 kWh on average in South Korea. The shortest day lasts 9 h 37 min, +3 min compared with Seoul.
Solar forecast for Chungju, 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 Chungju
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A free, live card for Chungju: 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.