Jiangsu · China · 34.03° N · 117.95° E
Solar position in Weiji
Sun position, daylight and the best solar panel angle for Weiji — computed for 34.03° N, 117.95° E, 24 m above sea level.
The sun right now
Sun in Weiji today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:57 | sun 18° below horizon |
| Nautical dawn | 05:26 | 12° below |
| Civil dawn | 05:55 | 6° below |
| Sunrise | 06:21 | 104° ESE |
| Golden hour ends | 06:55 | sun 6° up |
| Solar noon | 11:52 | 43.9° high |
| Golden hour starts | 16:48 | sun 6° up |
| Sunset | 17:22 | 256° WSW |
| Civil dusk | 17:48 | 6° below |
| Nautical dusk | 18:17 | 12° below |
| Astronomical dusk | 18:46 | 18° below |
| Day length | 11 h 02 min | |
Sun path diagram for Weiji
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 79.4° at solar noon in Weiji; on the December solstice only 32.6°. Sunrise swings from 61° ENE in June to 118° ESE in December — a 57° 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 | 07:11 | 12:19 | 17:27 | 10 h 16 min | 36.1° |
| February | 06:46 | 12:22 | 17:57 | 11 h 10 min | 45.4° |
| March | 06:11 | 12:15 | 18:20 | 12 h 09 min | 56.2° |
| April | 05:30 | 12:07 | 18:43 | 13 h 13 min | 67.8° |
| May | 05:03 | 12:04 | 19:06 | 14 h 04 min | 76.1° |
| June | 04:57 | 12:09 | 19:22 | 14 h 25 min | 79.4° |
| July | 05:11 | 12:14 | 19:17 | 14 h 06 min | 76.4° |
| August | 05:33 | 12:11 | 18:48 | 13 h 15 min | 68.1° |
| September | 05:55 | 12:01 | 18:06 | 12 h 12 min | 56.7° |
| October | 06:17 | 11:52 | 17:27 | 11 h 10 min | 45.3° |
| November | 06:45 | 11:53 | 17:01 | 10 h 16 min | 36.1° |
| December | 07:09 | 12:06 | 17:02 | 9 h 53 min | 32.6° |
A year of daylight in Weiji
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 Weiji
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
30°collects the most energy over a year: 1253 kWh per kWp.
42°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1117 | 89% | 1.84 | 2.3× |
| 15° | 1218 | 97% | 2.43 | 1.7× |
| 30° year-round best | 1253 | 100% | 2.87 | 1.4× |
| 34° = latitude | 1250 | 100% | 2.96 | 1.4× |
| 42° off-grid best | 1232 | 98% | 3.10 | 1.3× |
| 45° | 1220 | 97% | 3.13 | 1.3× |
| 60° | 1122 | 90% | 3.21 | 1.4× |
| 70° | 1024 | 82% | 3.14 | 1.5× |
| 90° | 768 | 61% | 2.77 | 2.1× |
A fixed array in Weiji produces the most over a year at 30°. The design month for an off-grid system is December: at 42° it makes 3.10 kWh per kWp a day, 8% more than at 30°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Weiji at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 30° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.34 | 3.52 | 3.18 | 2.92 | 0.1 °C |
| February | 2.84 | 3.28 | 2.92 | 3.08 | 3.0 °C |
| March | 4.01 | 3.77 | 3.29 | 3.90 | 8.6 °C |
| April | 4.78 | 3.50 | 2.96 | 4.08 | 15.3 °C |
| May | 5.14 | 3.10 | 2.55 | 3.98 | 21.3 °C |
| June | 4.89 | 2.78 | 2.23 | 3.62 | 25.6 °C |
| July | 4.57 | 2.68 | 2.14 | 3.38 | 27.7 °C |
| August | 4.50 | 3.03 | 2.44 | 3.54 | 26.7 °C |
| September | 4.00 | 3.36 | 2.78 | 3.51 | 22.1 °C |
| October | 3.30 | 3.56 | 3.02 | 3.32 | 16.0 °C |
| November | 2.53 | 3.46 | 3.02 | 2.95 | 8.6 °C |
| December | 2.21 | 3.50 | 3.14 | 2.87 | 1.7 °C |
| Year | 3.76 avg | 3.30 avg | 1024 kWh | 1253 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 550 Wp of panels at 70°, versus 410 Wp at 30°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Weiji
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.
4.0 mrow pitch at 70°
3.5 mrow pitch at 30°
How Weiji compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
1071stof 2,095 places in China for sunshine, shared: 3.76 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in China: 1,252 against 1,262 kWh per kWp.
+15 mindaylight on the longest day, compared with Shanghai: 14 h 26 min against 14 h 11 min.
30°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); Weiji ranks joint 1071st. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.14 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 53 min, −14 min compared with Shanghai.
Solar forecast for Weiji, 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 Weiji
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Places near Weiji
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A free, live card for Weiji: 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.