Southern District · Hong Kong · 22.22° N · 114.21° E
Solar position in Chek Chue
Sun position, daylight and the best solar panel angle for Chek Chue — computed for 22.22° N, 114.21° E, 12 m above sea level.
The sun right now
Sun in Chek Chue today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:08 | sun 18° below horizon |
| Nautical dawn | 05:34 | 12° below |
| Civil dawn | 06:00 | 6° below |
| Sunrise | 06:23 | 103° ESE |
| Golden hour ends | 06:54 | sun 6° up |
| Solar noon | 12:07 | 55.7° high |
| Golden hour starts | 17:20 | sun 6° up |
| Sunset | 17:50 | 257° WSW |
| Civil dusk | 18:13 | 6° below |
| Nautical dusk | 18:39 | 12° below |
| Astronomical dusk | 19:05 | 18° below |
| Day length | 11 h 27 min | |
Sun path diagram for Chek Chue
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 88.8° at solar noon in Chek Chue; on the December solstice only 44.4°. Sunrise swings from 64° ENE in June to 115° ESE in December — a 51° 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 | 07:04 | 12:34 | 18:04 | 11 h 00 min | 47.9° |
| February | 06:50 | 12:36 | 18:23 | 11 h 32 min | 57.2° |
| March | 06:26 | 12:30 | 18:34 | 12 h 08 min | 68.0° |
| April | 05:58 | 12:21 | 18:45 | 12 h 47 min | 79.6° |
| May | 05:41 | 12:19 | 18:58 | 13 h 17 min | 88.0° |
| June | 05:40 | 12:24 | 19:09 | 13 h 30 min | 88.8° |
| July | 05:50 | 12:29 | 19:08 | 13 h 18 min | 88.3° |
| August | 06:02 | 12:26 | 18:49 | 12 h 47 min | 79.9° |
| September | 06:11 | 12:16 | 18:20 | 12 h 09 min | 68.5° |
| October | 06:21 | 12:07 | 17:53 | 11 h 32 min | 57.1° |
| November | 06:38 | 12:08 | 17:38 | 11 h 00 min | 47.9° |
| December | 06:57 | 12:21 | 17:44 | 10 h 47 min | 44.4° |
A year of daylight in Chek Chue
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 Chek Chue
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
18°collects the most energy over a year: 1257 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 | February kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1206 | 96% | 2.53 | 1.8× |
| 15° | 1255 | 100% | 2.77 | 1.5× |
| 18° year-round best | 1257 | 100% | 2.80 | 1.5× |
| 22° = latitude | 1255 | 100% | 2.84 | 1.4× |
| 29° off-grid best | 1240 | 99% | 2.87 | 1.4× |
| 30° | 1237 | 98% | 2.87 | 1.4× |
| 45° | 1153 | 92% | 2.82 | 1.4× |
| 60° | 1009 | 80% | 2.62 | 1.6× |
| 70° | 887 | 71% | 2.40 | 1.9× |
| 90° | 619 | 49% | 1.83 | 2.4× |
A fixed array in Chek Chue produces the most over a year at 18°. The design month for an off-grid system is February: at 29° it makes 2.87 kWh per kWp a day, 2% more than at 18°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Chek Chue at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 18° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 18° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.01 | 3.33 | 2.81 | 2.87 | 16.9 °C |
| February | 3.13 | 2.88 | 2.40 | 2.80 | 18.3 °C |
| March | 3.43 | 2.61 | 2.15 | 2.89 | 20.5 °C |
| April | 4.07 | 2.49 | 2.02 | 3.25 | 23.4 °C |
| May | 4.76 | 2.32 | 1.86 | 3.62 | 26.3 °C |
| June | 4.89 | 2.16 | 1.70 | 3.62 | 28.1 °C |
| July | 5.55 | 2.36 | 1.87 | 4.12 | 28.7 °C |
| August | 5.16 | 2.74 | 2.19 | 3.98 | 28.5 °C |
| September | 4.79 | 3.31 | 2.67 | 3.91 | 27.8 °C |
| October | 4.39 | 3.90 | 3.19 | 3.85 | 25.3 °C |
| November | 3.56 | 3.87 | 3.21 | 3.34 | 22.1 °C |
| December | 3.07 | 3.65 | 3.08 | 3.00 | 18.1 °C |
| Year | 4.16 avg | 2.97 avg | 887 kWh | 1257 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 690 Wp of panels at 70°, versus 420 Wp at 18°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Chek Chue
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.
2.8 mrow pitch at 70°
2.6 mrow pitch at 18°
How Chek Chue compares in Hong Kong
Against the other 135 places in Hong Kong with climate data, for a fixed array at its best angle.
1stof 136 places in Hong Kong for sunshine, shared: 4.16 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Hong Kong: 1,257 against 1,255 kWh per kWp.
±0 mindaylight on the longest day, compared with Hong Kong: 13 h 30 min against 13 h 30 min.
18°best year-round tilt here; across Hong Kong it runs from 18° in Shek O to 20° in Fanling.
Chek Chue shares the top spot for sunshine among the 136 places in Hong Kong (4.16 peak sun hours a day); the least sunny are Sheung Shui and one other place with 4.11. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.70 kWh a day here, against 1.69 kWh on average in Hong Kong. The shortest day lasts 10 h 47 min, ±0 min compared with Hong Kong.
Solar forecast for Chek Chue, 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 Chek Chue
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A free, live card for Chek Chue: 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.