Tibet · China · 29.96° N · 90.72° E
Solar position in Dêqên
Sun position, daylight and the best solar panel angle for Dêqên — computed for 29.96° N, 90.72° E, 3974 m above sea level.
The sun right now
Sun in Dêqên today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:45 | sun 18° below horizon |
| Nautical dawn | 07:13 | 12° below |
| Civil dawn | 07:41 | 6° below |
| Sunrise | 08:05 | 103° ESE |
| Golden hour ends | 08:38 | sun 6° up |
| Solar noon | 13:41 | 47.9° high |
| Golden hour starts | 18:43 | sun 6° up |
| Sunset | 19:16 | 256° WSW |
| Civil dusk | 19:40 | 6° below |
| Nautical dusk | 20:08 | 12° below |
| Astronomical dusk | 20:36 | 18° below |
| Day length | 11 h 11 min | |
Sun path diagram for Dêqên
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 83.5° at solar noon in Dêqên; on the December solstice only 36.6°. Sunrise swings from 62° ENE in June to 117° ESE in December — a 55° 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 | 08:52 | 14:08 | 19:24 | 10 h 32 min | 40.2° |
| February | 08:31 | 14:10 | 19:50 | 11 h 19 min | 49.5° |
| March | 08:00 | 14:04 | 20:08 | 12 h 09 min | 60.3° |
| April | 07:24 | 13:55 | 20:27 | 13 h 03 min | 71.9° |
| May | 07:00 | 13:53 | 20:47 | 13 h 46 min | 80.2° |
| June | 06:56 | 13:58 | 21:01 | 14 h 05 min | 83.5° |
| July | 07:09 | 14:03 | 20:57 | 13 h 48 min | 80.5° |
| August | 07:27 | 14:00 | 20:32 | 13 h 05 min | 72.1° |
| September | 07:44 | 13:50 | 19:55 | 12 h 11 min | 60.7° |
| October | 08:02 | 13:41 | 19:20 | 11 h 18 min | 49.3° |
| November | 08:26 | 13:42 | 18:58 | 10 h 32 min | 40.1° |
| December | 08:48 | 13:55 | 19:01 | 10 h 13 min | 36.6° |
A year of daylight in Dêqên
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 Dêqên
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
35°collects the most energy over a year: 2094 kWh per kWp.
22°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° | 1797 | 86% | 5.58 | 1.7× |
| 15° | 1997 | 95% | 5.44 | 1.2× |
| 22° off-grid best | 2054 | 98% | 5.28 | 1.1× |
| 30° = latitude | 2089 | 100% | 5.01 | 1.3× |
| 35° year-round best | 2094 | 100% | 4.81 | 1.4× |
| 45° | 2068 | 99% | 4.33 | 1.6× |
| 60° | 1939 | 93% | 3.46 | 2.1× |
| 70° | 1798 | 86% | 2.81 | 2.6× |
| 90° | 1419 | 68% | 1.57 | 4.6× |
A fixed array in Dêqên produces the most over a year at 35°. The design month for an off-grid system is July: at 22° it makes 5.28 kWh per kWp a day, 10% more than at 35°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Dêqên at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 35° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 35° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 4.21 | 7.48 | 7.00 | 6.31 | -10.6 °C |
| February snow | 5.01 | 7.01 | 6.52 | 6.37 | -8.2 °C |
| March snow | 5.84 | 6.19 | 5.68 | 6.20 | -4.1 °C |
| April snow | 6.44 | 4.65 | 4.19 | 5.65 | 0.2 °C |
| May | 6.94 | 3.56 | 3.14 | 5.29 | 4.3 °C |
| June | 7.09 | 3.23 | 2.80 | 5.05 | 8.5 °C |
| July | 6.58 | 3.26 | 2.81 | 4.81 | 9.0 °C |
| August | 6.28 | 3.76 | 3.27 | 5.01 | 8.2 °C |
| September | 5.69 | 4.50 | 3.98 | 5.21 | 5.8 °C |
| October | 5.31 | 5.97 | 5.38 | 5.99 | 0.5 °C |
| November snow | 4.61 | 7.76 | 7.09 | 6.52 | -4.6 °C |
| December snow | 4.10 | 7.96 | 7.37 | 6.49 | -8.8 °C |
| Year | 5.68 avg | 5.43 avg | 1798 kWh | 2094 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 420 Wp of panels at 70°, versus 250 Wp at 35°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Dêqên
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.
3.5 mrow pitch at 70°
3.4 mrow pitch at 35°
How Dêqên compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
7thof 2,095 places in China for sunshine, shared: 5.68 peak sun hours a day on flat ground.
+66%solar energy a year compared with the average place in China: 2,094 against 1,262 kWh per kWp.
−6 mindaylight on the longest day, compared with Shanghai: 14 h 05 min against 14 h 11 min.
35°best year-round tilt here; across China it runs from 14° in Haikou to 52° in Xilinji.
Of the 2,095 places in China, Nyêmo gets the most sun (5.75 peak sun hours a day) and Baima and 11 other places the least (2.91); Dêqên ranks joint 7th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.80 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 13 min, +6 min compared with Shanghai.
Solar forecast for Dêqên, 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 Dêqên
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A free, live card for Dêqên: 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.