Gyeonggi-do · South Korea · 37.60° N · 127.14° E
Solar position in Guri-si
Sun position, daylight and the best solar panel angle for Guri-si — computed for 37.60° N, 127.14° E, 31 m above sea level.
The sun right now
Sun in Guri-si 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 | 06:22 | 6° below |
| Sunrise | 06:48 | 105° ESE |
| Golden hour ends | 07:25 | sun 6° up |
| Solar noon | 12:15 | 40.3° high |
| Golden hour starts | 17:05 | sun 6° up |
| Sunset | 17:41 | 255° WSW |
| Civil dusk | 18:08 | 6° below |
| Nautical dusk | 18:39 | 12° below |
| Astronomical dusk | 19:09 | 18° below |
| Day length | 10 h 53 min | |
Sun path diagram for Guri-si
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 75.8° at solar noon in Guri-si; on the December solstice only 29.0°. 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 | 07:42 | 12:42 | 17:42 | 10 h 00 min | 32.5° |
| February | 07:14 | 12:45 | 18:16 | 11 h 02 min | 41.8° |
| March | 06:34 | 12:38 | 18:43 | 12 h 10 min | 52.6° |
| April | 05:49 | 12:30 | 19:11 | 13 h 23 min | 64.2° |
| May | 05:17 | 12:28 | 19:38 | 14 h 21 min | 72.6° |
| June | 05:10 | 12:33 | 19:56 | 14 h 46 min | 75.8° |
| July | 05:26 | 12:37 | 19:49 | 14 h 23 min | 72.9° |
| August | 05:52 | 12:34 | 19:16 | 13 h 25 min | 64.5° |
| September | 06:18 | 12:24 | 18:30 | 12 h 13 min | 53.1° |
| October | 06:44 | 12:15 | 17:46 | 11 h 02 min | 41.7° |
| November | 07:17 | 12:17 | 17:17 | 10 h 00 min | 32.5° |
| December | 07:42 | 12:29 | 17:16 | 9 h 34 min | 29.0° |
A year of daylight in Guri-si
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 Guri-si
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: 1372 kWh per kWp.
30°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° | 1158 | 84% | 3.22 | 2.5× |
| 15° | 1297 | 95% | 3.24 | 1.8× |
| 30° off-grid best | 1366 | 100% | 3.09 | 1.4× |
| 36° year-round best | 1372 | 100% | 2.99 | 1.5× |
| 38° = latitude | 1372 | 100% | 2.96 | 1.5× |
| 45° | 1359 | 99% | 2.80 | 1.6× |
| 60° | 1279 | 93% | 2.38 | 1.7× |
| 70° | 1188 | 87% | 2.05 | 2.0× |
| 90° | 930 | 68% | 1.32 | 2.9× |
A fixed array in Guri-si produces the most over a year at 36°. The design month for an off-grid system is July: at 30° it makes 3.09 kWh per kWp a day, 3% more than at 36°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Guri-si 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 | 2.43 | 4.35 | 4.00 | 3.55 | -4.5 °C |
| February snow | 3.19 | 4.40 | 4.01 | 3.97 | -1.8 °C |
| March | 4.20 | 4.32 | 3.86 | 4.41 | 3.1 °C |
| April | 4.94 | 3.83 | 3.33 | 4.39 | 9.3 °C |
| May | 5.52 | 3.45 | 2.91 | 4.33 | 15.5 °C |
| June | 5.19 | 3.03 | 2.49 | 3.83 | 20.5 °C |
| July | 4.05 | 2.53 | 2.05 | 2.99 | 23.6 °C |
| August | 4.30 | 3.05 | 2.48 | 3.41 | 24.3 °C |
| September | 4.07 | 3.66 | 3.05 | 3.71 | 19.5 °C |
| October | 3.55 | 4.31 | 3.71 | 3.95 | 12.9 °C |
| November | 2.46 | 3.83 | 3.39 | 3.26 | 5.4 °C |
| December snow | 2.16 | 4.20 | 3.83 | 3.32 | -2.3 °C |
| Year | 3.84 avg | 3.74 avg | 1188 kWh | 1372 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 580 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 Guri-si
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.
4.6 mrow pitch at 70°
4.0 mrow pitch at 36°
How Guri-si compares in South Korea
Against the other 144 places in South Korea with climate data, for a fixed array at its best angle.
113thof 145 places in South Korea for sunshine, shared: 3.84 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in South Korea: 1,372 against 1,356 kWh per kWp.
±0 mindaylight on the longest day, compared with Seoul: 14 h 46 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); Guri-si ranks joint 113th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.05 kWh a day here, against 2.12 kWh on average in South Korea. The shortest day lasts 9 h 34 min, ±0 min compared with Seoul.
Solar forecast for Guri-si, 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 Guri-si
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Places near Guri-si
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A free, live card for Guri-si: 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.