Yunnan · China · 25.40° N · 100.83° E
Solar position in Xiazhuang
Sun position, daylight and the best solar panel angle for Xiazhuang — computed for 25.40° N, 100.83° E, 2228 m above sea level.
The sun right now
Sun in Xiazhuang today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:03 | sun 18° below horizon |
| Nautical dawn | 06:29 | 12° below |
| Civil dawn | 06:56 | 6° below |
| Sunrise | 07:20 | 103° ESE |
| Golden hour ends | 07:51 | sun 6° up |
| Solar noon | 13:00 | 52.5° high |
| Golden hour starts | 18:09 | sun 6° up |
| Sunset | 18:40 | 257° WSW |
| Civil dusk | 19:04 | 6° below |
| Nautical dusk | 19:31 | 12° below |
| Astronomical dusk | 19:58 | 18° below |
| Day length | 11 h 21 min | |
Sun path diagram for Xiazhuang
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 88.0° at solar noon in Xiazhuang; on the December solstice only 41.2°. Sunrise swings from 63° ENE in June to 116° ESE in December — a 52° 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 | 08:03 | 13:27 | 18:52 | 10 h 49 min | 44.7° |
| February | 07:47 | 13:30 | 19:13 | 11 h 27 min | 54.1° |
| March | 07:20 | 13:24 | 19:28 | 12 h 08 min | 64.8° |
| April | 06:48 | 13:15 | 19:42 | 12 h 53 min | 76.5° |
| May | 06:29 | 13:13 | 19:57 | 13 h 28 min | 84.8° |
| June | 06:26 | 13:18 | 20:10 | 13 h 43 min | 88.0° |
| July | 06:38 | 13:23 | 20:07 | 13 h 30 min | 85.1° |
| August | 06:52 | 13:19 | 19:46 | 12 h 54 min | 76.7° |
| September | 07:04 | 13:09 | 19:14 | 12 h 10 min | 65.3° |
| October | 07:18 | 13:01 | 18:44 | 11 h 26 min | 53.9° |
| November | 07:37 | 13:02 | 18:26 | 10 h 49 min | 44.7° |
| December | 07:57 | 13:14 | 18:31 | 10 h 33 min | 41.2° |
A year of daylight in Xiazhuang
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 Xiazhuang
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
29°collects the most energy over a year: 1574 kWh per kWp.
12°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° | 1411 | 90% | 3.55 | 1.5× |
| 12° off-grid best | 1517 | 96% | 3.50 | 1.4× |
| 15° | 1535 | 98% | 3.47 | 1.5× |
| 25° = latitude | 1571 | 100% | 3.32 | 1.6× |
| 29° year-round best | 1574 | 100% | 3.25 | 1.7× |
| 30° | 1573 | 100% | 3.23 | 1.7× |
| 45° | 1524 | 97% | 2.85 | 2.0× |
| 60° | 1391 | 88% | 2.35 | 2.4× |
| 70° | 1260 | 80% | 1.99 | 2.7× |
| 90° | 930 | 59% | 1.31 | 3.6× |
A fixed array in Xiazhuang produces the most over a year at 29°. The design month for an off-grid system is July: at 12° it makes 3.50 kWh per kWp a day, 8% more than at 29°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Xiazhuang at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 29° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 29° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.30 | 6.19 | 5.44 | 5.25 | 7.4 °C |
| February | 5.12 | 5.81 | 5.06 | 5.51 | 9.8 °C |
| March | 5.56 | 4.65 | 4.00 | 5.15 | 13.2 °C |
| April | 5.71 | 3.49 | 2.95 | 4.62 | 16.6 °C |
| May | 5.56 | 2.76 | 2.29 | 4.11 | 19.1 °C |
| June | 5.08 | 2.56 | 2.09 | 3.68 | 20.7 °C |
| July | 4.40 | 2.43 | 1.99 | 3.25 | 20.3 °C |
| August | 4.50 | 2.71 | 2.24 | 3.46 | 20.0 °C |
| September | 4.16 | 3.02 | 2.52 | 3.45 | 18.5 °C |
| October | 3.97 | 3.71 | 3.15 | 3.76 | 15.5 °C |
| November | 4.20 | 5.43 | 4.70 | 4.76 | 11.4 °C |
| December | 3.89 | 5.81 | 5.10 | 4.83 | 8.1 °C |
| Year | 4.70 avg | 4.04 avg | 1260 kWh | 1574 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 590 Wp of panels at 70°, versus 360 Wp at 29°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Xiazhuang
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.
3.1 mrow pitch at 70°
3.0 mrow pitch at 29°
How Xiazhuang compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
137thof 2,095 places in China for sunshine, shared: 4.70 peak sun hours a day on flat ground.
+25%solar energy a year compared with the average place in China: 1,574 against 1,262 kWh per kWp.
−27 mindaylight on the longest day, compared with Shanghai: 13 h 43 min against 14 h 11 min.
29°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); Xiazhuang ranks joint 137th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.99 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 33 min, +26 min compared with Shanghai.
Solar forecast for Xiazhuang, 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 Xiazhuang
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Places near Xiazhuang
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A free, live card for Xiazhuang: 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.