Prachuap Khiri Khan · Thailand · 12.38° N · 99.90° E
Solar position in Pran Buri
Sun position, daylight and the best solar panel angle for Pran Buri — computed for 12.38° N, 99.90° E, 10 m above sea level.
The sun right now
Sun in Pran Buri today
Saturday, 24 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:00 | sun 18° below horizon |
| Nautical dawn | 05:25 | 12° below |
| Civil dawn | 05:50 | 6° below |
| Sunrise | 06:11 | 102° ESE |
| Golden hour ends | 06:40 | sun 6° up |
| Solar noon | 12:04 | 65.9° high |
| Golden hour starts | 17:28 | sun 6° up |
| Sunset | 17:57 | 258° WSW |
| Civil dusk | 18:19 | 6° below |
| Nautical dusk | 18:44 | 12° below |
| Astronomical dusk | 19:08 | 18° below |
| Day length | 11 h 46 min | |
Sun path diagram for Pran Buri
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 78.9° at solar noon in Pran Buri; on the December solstice only 54.2°. 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 | 06:46 | 12:31 | 18:17 | 11 h 31 min | 57.7° |
| February | 06:40 | 12:34 | 18:28 | 11 h 48 min | 67.1° |
| March | 06:24 | 12:27 | 18:31 | 12 h 07 min | 77.9° |
| April | 06:05 | 12:19 | 18:33 | 12 h 28 min | 89.5° |
| May | 05:54 | 12:16 | 18:39 | 12 h 44 min | 82.2° |
| June | 05:56 | 12:22 | 18:47 | 12 h 51 min | 78.9° |
| July | 06:04 | 12:26 | 18:49 | 12 h 45 min | 81.9° |
| August | 06:09 | 12:23 | 18:37 | 12 h 28 min | 89.7° |
| September | 06:09 | 12:13 | 18:17 | 12 h 08 min | 78.3° |
| October | 06:11 | 12:04 | 17:58 | 11 h 48 min | 66.9° |
| November | 06:20 | 12:06 | 17:51 | 11 h 31 min | 57.7° |
| December | 06:36 | 12:18 | 18:00 | 11 h 24 min | 54.2° |
A year of daylight in Pran Buri
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 Pran Buri
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
14°collects the most energy over a year: 1463 kWh per kWp.
3°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° | 1429 | 98% | 3.61 | 1.3× |
| 3° off-grid best | 1442 | 99% | 3.58 | 1.3× |
| 12° = latitude | 1462 | 100% | 3.45 | 1.3× |
| 14° year-round best | 1463 | 100% | 3.41 | 1.4× |
| 15° | 1462 | 100% | 3.39 | 1.4× |
| 30° | 1418 | 97% | 3.01 | 1.6× |
| 45° | 1298 | 89% | 2.48 | 1.9× |
| 60° | 1111 | 76% | 1.86 | 2.4× |
| 70° | 959 | 66% | 1.45 | 2.9× |
| 90° | 665 | 45% | 1.11 | 2.9× |
A fixed array in Pran Buri produces the most over a year at 14°. The design month for an off-grid system is July: at 3° it makes 3.58 kWh per kWp a day, 5% more than at 14°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Pran Buri at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 14° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 14° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.88 | 4.90 | 4.03 | 4.37 | 24.4 °C |
| February | 5.44 | 4.51 | 3.69 | 4.65 | 25.8 °C |
| March | 5.68 | 3.66 | 2.97 | 4.62 | 27.2 °C |
| April | 5.87 | 2.72 | 2.17 | 4.53 | 28.4 °C |
| May | 5.17 | 2.05 | 1.62 | 3.88 | 27.6 °C |
| June | 4.74 | 1.81 | 1.43 | 3.52 | 26.8 °C |
| July | 4.56 | 1.84 | 1.45 | 3.41 | 26.3 °C |
| August | 4.53 | 2.18 | 1.74 | 3.48 | 26.2 °C |
| September | 4.61 | 2.76 | 2.23 | 3.67 | 25.9 °C |
| October | 4.45 | 3.30 | 2.68 | 3.69 | 25.7 °C |
| November | 4.64 | 4.29 | 3.51 | 4.05 | 25.2 °C |
| December | 4.73 | 4.96 | 4.09 | 4.28 | 24.1 °C |
| Year | 4.94 avg | 3.24 avg | 959 kWh | 1463 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 820 Wp of panels at 70°, versus 350 Wp at 14°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Pran Buri
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.
2.2 mrow pitch at 70°
2.3 mrow pitch at 14°
How Pran Buri compares in Thailand
Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.
245thof 295 places in Thailand for sunshine, shared: 4.94 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Thailand: 1,462 against 1,509 kWh per kWp.
−5 mindaylight on the longest day, compared with Bangkok: 12 h 51 min against 12 h 56 min.
14°best year-round tilt here; across Thailand it runs from 4° in Narathiwat to 23° in Mae Chan.
Of the 295 places in Thailand, Bangkok and 7 other places get the most sun (5.23 peak sun hours a day) and Mae Ramat the least (4.74); Pran Buri ranks joint 245th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.43 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 24 min, +5 min compared with Bangkok.
Solar forecast for Pran Buri, 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 Pran Buri
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A free, live card for Pran Buri: 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.