Gansu · China · 34.26° N · 105.46° E
Solar position in Yanguan
Sun position, daylight and the best solar panel angle for Yanguan — computed for 34.26° N, 105.46° E, 1502 m above sea level.
The sun right now
Sun in Yanguan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:47 | sun 18° below horizon |
| Nautical dawn | 06:16 | 12° below |
| Civil dawn | 06:45 | 6° below |
| Sunrise | 07:11 | 104° ESE |
| Golden hour ends | 07:45 | sun 6° up |
| Solar noon | 12:42 | 43.7° high |
| Golden hour starts | 17:38 | sun 6° up |
| Sunset | 18:12 | 256° WSW |
| Civil dusk | 18:38 | 6° below |
| Nautical dusk | 19:07 | 12° below |
| Astronomical dusk | 19:36 | 18° below |
| Day length | 11 h 01 min | |
Sun path diagram for Yanguan
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 79.2° at solar noon in Yanguan; on the December solstice only 32.3°. Sunrise swings from 61° ENE in June to 118° ESE in December — a 58° 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 | 08:02 | 13:09 | 18:16 | 10 h 15 min | 35.9° |
| February | 07:37 | 13:11 | 18:46 | 11 h 10 min | 45.2° |
| March | 07:01 | 13:05 | 19:10 | 12 h 09 min | 56.0° |
| April | 06:20 | 12:56 | 19:34 | 13 h 14 min | 67.6° |
| May | 05:52 | 12:54 | 19:57 | 14 h 05 min | 75.9° |
| June | 05:46 | 12:59 | 20:13 | 14 h 27 min | 79.2° |
| July | 06:01 | 13:04 | 20:07 | 14 h 07 min | 76.2° |
| August | 06:23 | 13:01 | 19:38 | 13 h 15 min | 67.8° |
| September | 06:45 | 12:51 | 18:56 | 12 h 12 min | 56.4° |
| October | 07:08 | 12:42 | 18:17 | 11 h 09 min | 45.1° |
| November | 07:36 | 12:43 | 17:51 | 10 h 15 min | 35.8° |
| December | 08:00 | 12:56 | 17:52 | 9 h 52 min | 32.3° |
A year of daylight in Yanguan
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 Yanguan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
31°collects the most energy over a year: 1299 kWh per kWp.
33°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 | October kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1155 | 89% | 2.32 | 2.1× |
| 15° | 1261 | 97% | 2.66 | 1.6× |
| 30° | 1299 | 100% | 2.85 | 1.5× |
| 31° year-round best | 1299 | 100% | 2.86 | 1.5× |
| 33° off-grid best | 1299 | 100% | 2.87 | 1.5× |
| 34° = latitude | 1298 | 100% | 2.88 | 1.5× |
| 45° | 1269 | 98% | 2.88 | 1.4× |
| 60° | 1172 | 90% | 2.75 | 1.5× |
| 70° | 1074 | 83% | 2.58 | 1.7× |
| 90° | 818 | 63% | 2.05 | 2.6× |
A fixed array in Yanguan produces the most over a year at 31°. The design month for an off-grid system is October: at 33° it makes 2.87 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Yanguan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 31° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 31° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.56 | 4.17 | 3.82 | 3.36 | -3.0 °C |
| February snow | 3.07 | 3.81 | 3.44 | 3.47 | 0.1 °C |
| March | 4.02 | 3.80 | 3.36 | 3.98 | 5.2 °C |
| April | 4.94 | 3.59 | 3.10 | 4.27 | 11.1 °C |
| May | 5.26 | 3.11 | 2.62 | 4.13 | 15.5 °C |
| June | 5.23 | 2.82 | 2.33 | 3.89 | 19.5 °C |
| July | 5.06 | 2.83 | 2.32 | 3.79 | 21.5 °C |
| August | 4.57 | 3.02 | 2.50 | 3.66 | 20.4 °C |
| September | 3.26 | 2.70 | 2.27 | 2.88 | 15.5 °C |
| October | 2.81 | 2.98 | 2.58 | 2.86 | 9.9 °C |
| November | 2.54 | 3.61 | 3.22 | 3.11 | 3.6 °C |
| December snow | 2.41 | 4.15 | 3.78 | 3.32 | -1.9 °C |
| Year | 3.82 avg | 3.38 avg | 1074 kWh | 1299 kWh |
Sizing example. To run a 1 kWh-per-day load through September on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 520 Wp of panels at 70°, versus 410 Wp at 31°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Yanguan
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.
4.1 mrow pitch at 70°
3.6 mrow pitch at 31°
How Yanguan compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
939thof 2,095 places in China for sunshine, shared: 3.82 peak sun hours a day on flat ground.
+3%solar energy a year compared with the average place in China: 1,300 against 1,262 kWh per kWp.
+16 mindaylight on the longest day, compared with Shanghai: 14 h 27 min against 14 h 11 min.
31°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); Yanguan ranks joint 939th. In its darkest month, September, 1 kWp of off-grid panels at 70° makes 2.27 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 52 min, −15 min compared with Shanghai.
Solar forecast for Yanguan, 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 Yanguan
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A free, live card for Yanguan: 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.