Can Tho City · Vietnam · 10.11° N · 105.62° E
Solar position in Ô Môn
Sun position, daylight and the best solar panel angle for Ô Môn — computed for 10.11° N, 105.62° E, 5 m above sea level.
The sun right now
Sun in Ô Môn today
Saturday, 24 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:35 | sun 18° below horizon |
| Nautical dawn | 05:00 | 12° below |
| Civil dawn | 05:25 | 6° below |
| Sunrise | 05:46 | 102° ESE |
| Golden hour ends | 06:15 | sun 6° up |
| Solar noon | 11:41 | 68.1° high |
| Golden hour starts | 17:08 | sun 6° up |
| Sunset | 17:36 | 258° WSW |
| Civil dusk | 17:58 | 6° below |
| Nautical dusk | 18:22 | 12° below |
| Astronomical dusk | 18:47 | 18° below |
| Day length | 11 h 50 min | |
Sun path diagram for Ô Môn
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 76.7° at solar noon in Ô Môn; on the December solstice only 56.5°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 48° 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 | 06:19 | 12:08 | 17:57 | 11 h 38 min | 60.0° |
| February | 06:15 | 12:11 | 18:06 | 11 h 52 min | 69.3° |
| March | 06:01 | 12:04 | 18:08 | 12 h 07 min | 80.1° |
| April | 05:44 | 11:56 | 18:08 | 12 h 24 min | 88.3° |
| May | 05:35 | 11:54 | 18:12 | 12 h 37 min | 79.9° |
| June | 05:37 | 11:59 | 18:20 | 12 h 43 min | 76.7° |
| July | 05:45 | 12:03 | 18:22 | 12 h 38 min | 79.6° |
| August | 05:48 | 12:00 | 18:12 | 12 h 24 min | 88.0° |
| September | 05:46 | 11:50 | 17:54 | 12 h 08 min | 80.6° |
| October | 05:46 | 11:42 | 17:37 | 11 h 51 min | 69.2° |
| November | 05:54 | 11:43 | 17:32 | 11 h 38 min | 60.0° |
| December | 06:09 | 11:55 | 17:41 | 11 h 32 min | 56.5° |
A year of daylight in Ô Môn
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 Ô Môn
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
11°collects the most energy over a year: 1478 kWh per kWp.
1°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° | 1458 | 99% | 3.74 | 1.3× |
| 1° off-grid best | 1462 | 99% | 3.72 | 1.2× |
| 10° = latitude | 1478 | 100% | 3.58 | 1.3× |
| 11° year-round best | 1478 | 100% | 3.56 | 1.3× |
| 15° | 1474 | 100% | 3.47 | 1.4× |
| 30° | 1411 | 95% | 3.03 | 1.6× |
| 45° | 1273 | 86% | 2.44 | 1.9× |
| 60° | 1071 | 72% | 1.76 | 2.5× |
| 70° | 912 | 62% | 1.33 | 3.0× |
| 90° | 626 | 42% | 1.07 | 2.8× |
A fixed array in Ô Môn produces the most over a year at 11°. The design month for an off-grid system is July: at 1° it makes 3.72 kWh per kWp a day, 5% more than at 11°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Ô Môn at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 11° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 11° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.98 | 4.71 | 3.84 | 4.28 | 26.2 °C |
| February | 5.61 | 4.44 | 3.60 | 4.67 | 27.6 °C |
| March | 5.89 | 3.63 | 2.92 | 4.71 | 29.3 °C |
| April | 5.90 | 2.54 | 2.01 | 4.52 | 30.4 °C |
| May | 5.25 | 1.81 | 1.42 | 3.93 | 29.3 °C |
| June | 4.87 | 1.62 | 1.26 | 3.63 | 27.8 °C |
| July | 4.73 | 1.70 | 1.33 | 3.56 | 27.2 °C |
| August | 4.79 | 2.07 | 1.64 | 3.68 | 27.0 °C |
| September | 4.72 | 2.67 | 2.15 | 3.74 | 26.9 °C |
| October | 4.71 | 3.38 | 2.74 | 3.86 | 26.8 °C |
| November | 4.75 | 4.19 | 3.42 | 4.03 | 26.5 °C |
| December | 4.66 | 4.55 | 3.72 | 4.03 | 25.9 °C |
| Year | 5.07 avg | 3.10 avg | 912 kWh | 1478 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 930 Wp of panels at 70°, versus 330 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Ô Môn
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.
2.1 mrow pitch at 70°
2.2 mrow pitch at 11°
How Ô Môn compares in Vietnam
Against the other 306 places in Vietnam with climate data, for a fixed array at its best angle.
89thof 307 places in Vietnam for sunshine, shared: 5.07 peak sun hours a day on flat ground.
+12%solar energy a year compared with the average place in Vietnam: 1,478 against 1,320 kWh per kWp.
−3 mindaylight on the longest day, compared with Ho Chi Minh City: 12 h 43 min against 12 h 46 min.
11°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); Ô Môn ranks joint 89th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.26 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 11 h 32 min, +3 min compared with Ho Chi Minh City.
Solar forecast for Ô Môn, 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 Ô Môn
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Places near Ô Môn
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A free, live card for Ô Môn: 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.