Solarposition.org

Tuyen Quang · Vietnam · 21.82° N · 105.21° E

Solar position in Tuyên Quang

Sun position, daylight and the best solar panel angle for Tuyên Quang — computed for 21.82° N, 105.21° E, 35 m above sea level.

Sunrise today05:59103° ESE
Sunset today17:27257° WSW
Best panel angle17°year-round, facing south
Off-grid angle38°best for the darkest month

The sun right now

Azimuth180.0°
Elevation56.1°
At solar noon, 11:43Open on the sun map

Sun in Tuyên Quang today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn04:44sun 18° below horizon
Nautical dawn05:1012° below
Civil dawn05:366° below
Sunrise05:59103° ESE
Golden hour ends06:29sun 6° up
Solar noon11:4356.1° high
Golden hour starts16:56sun 6° up
Sunset17:27257° WSW
Civil dusk17:496° below
Nautical dusk18:1612° below
Astronomical dusk18:4218° below
Day length11 h 28 min

Sun path diagram for Tuyên Quang

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice6789101112131415161718EquinoxDecember solstice7891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 88.4° at solar noon in Tuyên Quang; on the December solstice only 44.8°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:3912:1017:4111 h 01 min48.3°
February06:2612:1217:5911 h 33 min57.6°
March06:0212:0618:1012 h 08 min68.4°
April05:3511:5718:2012 h 46 min80.0°
May05:1811:5518:3313 h 15 min88.4°
June05:1612:0018:4413 h 28 min88.4°
July05:2712:0518:4313 h 17 min88.6°
August05:3812:0218:2512 h 47 min80.3°
September05:4711:5217:5612 h 09 min68.9°
October05:5711:4317:2911 h 33 min57.5°
November06:1411:4417:1511 h 01 min48.3°
December06:3211:5717:2110 h 48 min44.8°

A year of daylight in Tuyên Quang

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Tuyên Quang

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

17°collects the most energy over a year: 1118 kWh per kWp.

38°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 17°Best worst-month 38°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJanuary kWh/kWp/dayBest ÷ worst month
0°108497%1.832.1×
15°1118100%2.061.8×
17° year-round best1118100%2.091.7×
22° = latitude1114100%2.131.7×
30°109698%2.181.6×
38° off-grid best106195%2.201.5×
45°101991%2.191.5×
60°89280%2.091.4×
70°78570%1.951.5×
90°55450%1.572.0×

A fixed array in Tuyên Quang produces the most over a year at 17°. The design month for an off-grid system is January: at 38° it makes 2.20 kWh per kWp a day, 6% more than at 17°, and costs 5% of the yearly total. Why steep panels win winter.

Off-grid solar in Tuyên Quang at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 17° (year-round best).

01234January: 1.95 (70°)2.0JanFebruary: 2.06 (70°)2.1FebMarch: 1.93 (70°)1.9MarApril: 1.98 (70°)2.0AprMay: 1.91 (70°)1.9MayJune: 1.84 (70°)1.8JunJuly: 1.85 (70°)1.8JulAugust: 2.09 (70°)2.1AugSeptember: 2.48 (70°)2.5SepOctober: 2.51 (70°)2.5OctNovember: 2.82 (70°)2.8NovDecember: 2.40 (70°)2.4Dec17°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 17°Mean temp.
January2.272.311.952.0913.9 °C
February2.772.472.062.4516.7 °C
March3.132.351.932.6120.1 °C
April3.942.441.983.1423.8 °C
May4.732.391.913.6226.1 °C
June4.772.311.843.5927.0 °C
July4.712.321.853.5627.0 °C
August4.622.602.093.6026.7 °C
September4.413.052.483.6025.3 °C
October3.593.052.513.1022.3 °C
November3.183.372.822.9718.8 °C
December2.522.822.402.4014.4 °C
Year3.72 avg2.62 avg785 kWh1118 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 640 Wp of panels at 70°, versus 570 Wp at 17°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Tuyên Quang

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 17°

Row spacing calculator

How Tuyên Quang compares in Vietnam

Against the other 306 places in Vietnam with climate data, for a fixed array at its best angle.

289thof 307 places in Vietnam for sunshine, shared: 3.73 peak sun hours a day on flat ground.

−15%solar energy a year compared with the average place in Vietnam: 1,118 against 1,320 kWh per kWp.

+42 mindaylight on the longest day, compared with Ho Chi Minh City: 13 h 28 min against 12 h 46 min.

17°best year-round tilt here; across Vietnam it runs from 9° in Vĩnh Châu to 21° in Dien Bien Phu.

Of the 307 places in Vietnam, Phú Quý gets the most sun (5.45 peak sun hours a day) and Thị Trấn Thất Khê and one other place the least (3.61); Tuyên Quang ranks joint 289th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.84 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 10 h 48 min, −41 min compared with Ho Chi Minh City.

The sunniest places in Vietnam

Solar forecast for Tuyên Quang, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Tuyên Quang

What is the best solar panel angle in Tuyên Quang?
For a fixed array facing south, the best year-round tilt in Tuyên Quang is 17°, worth about 1118 kWh per kWp a year. An off-grid system that has to get through January does better at about 38°.
What time is sunrise and sunset in Tuyên Quang today?
On 25 October 2026 the sun rises at 05:59 and sets at 17:27 local time (UTC+7), giving 11 h 28 min of daylight. Solar noon is at 11:43.
How many peak sun hours does Tuyên Quang get?
On a flat surface 3.7 hours a day averaged over the year, from 2.3 in January to 4.8 in June. Panels tilted at 70° receive 2.3 sun hours a day in June.
How high does the sun get in Tuyên Quang?
At solar noon the sun stands 88.4° above the horizon on the June solstice and 44.8° on the December solstice.
Is Tuyên Quang a good place for solar panels?
With 3.7 peak sun hours a day on flat ground, Tuyên Quang ranks joint 289th of 307 places in Vietnam for sunshine. A 1 kWp array at the best angle (17°) makes about 1,118 kWh a year here, 15% less than the average place in Vietnam.

Places near Tuyên Quang

All places in Vietnam

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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.