Solarposition.org

Nakhon Si Thammarat · Thailand · 8.18° N · 99.85° E

Solar position in Ron Phibun

Sun position, daylight and the best solar panel angle for Ron Phibun — computed for 8.18° N, 99.85° E, 37 m above sea level.

Sunrise today06:08102° ESE
Sunset today18:00258° WSW
Best panel angle7°year-round, facing south
Off-grid angle19°best for the darkest month

The sun right now

Azimuth180.0°
Elevation69.7°
At solar noon, 12:04Open on the sun map

Sun in Ron Phibun today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn04:57sun 18° below horizon
Nautical dawn05:2212° below
Civil dawn05:466° below
Sunrise06:08102° ESE
Golden hour ends06:36sun 6° up
Solar noon12:0469.7° high
Golden hour starts17:32sun 6° up
Sunset18:00258° WSW
Civil dusk18:226° below
Nautical dusk18:4712° below
Astronomical dusk19:1118° below
Day length11 h 53 min

Sun path diagram for Ron Phibun

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 solstice789101112131415161718EquinoxDecember solstice789101112131415161718Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 74.7° at solar noon in Ron Phibun; on the December solstice only 58.4°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 47° 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
January06:4012:3118:2311 h 43 min61.9°
February06:3612:3418:3111 h 55 min71.3°
March06:2412:2718:3112 h 07 min82.1°
April06:0912:1918:2912 h 21 min86.3°
May06:0112:1718:3212 h 31 min78.0°
June06:0412:2218:4012 h 36 min74.7°
July06:1112:2718:4212 h 32 min77.7°
August06:1312:2318:3412 h 21 min86.1°
September06:1012:1318:1712 h 07 min82.5°
October06:0812:0518:0211 h 54 min71.1°
November06:1412:0617:5811 h 43 min61.9°
December06:2912:1818:0811 h 39 min58.4°

A year of daylight in Ron Phibun

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 Ron Phibun

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

7°collects the most energy over a year: 1434 kWh per kWp.

19°gives the most in the darkest month — the one an off-grid system is sized for.

30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 7°Best worst-month 19°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearNovember kWh/kWp/dayBest ÷ worst month
0°142599%3.171.5×
7° year-round best1434100%3.301.4×
8° = latitude1434100%3.311.4×
15°142499%3.401.4×
19° off-grid best141198%3.431.4×
30°134994%3.441.6×
45°120384%3.311.9×
60°99970%3.002.4×
70°84459%2.712.8×
90°57840%1.962.3×

A fixed array in Ron Phibun produces the most over a year at 7°. The design month for an off-grid system is November: at 19° it makes 3.43 kWh per kWp a day, 4% more than at 7°, and costs 2% of the yearly total. Why steep panels win winter.

Off-grid solar in Ron Phibun at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 7° (year-round best).

0123456January: 3.48 (70°)3.5JanFebruary: 3.55 (70°)3.5FebMarch: 2.83 (70°)2.8MarApril: 1.94 (70°)1.9AprMay: 1.44 (70°)1.4MayJune: 1.29 (70°)1.3JunJuly: 1.34 (70°)1.3JulAugust: 1.65 (70°)1.6AugSeptember: 2.15 (70°)2.2SepOctober: 2.49 (70°)2.5OctNovember: 2.71 (70°)2.7NovDecember: 2.96 (70°)3.0Dec7°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 7°Mean temp.
January4.704.253.483.9325.5 °C
February5.664.343.554.6725.9 °C
March5.923.492.834.7527.1 °C
April5.772.431.944.5028.0 °C
May5.111.841.443.9327.7 °C
June4.931.641.293.7727.1 °C
July4.871.701.343.7426.7 °C
August4.982.071.653.8826.6 °C
September4.852.672.153.8526.4 °C
October4.443.082.493.5926.4 °C
November4.023.342.713.3026.2 °C
December3.973.632.963.3025.7 °C
Year4.93 avg2.87 avg844 kWh1434 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 920 Wp of panels at 70°, versus 360 Wp at 7°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Ron Phibun

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.

2.0 mrow pitch at 70°

2.2 mrow pitch at 7°

Row spacing calculator

How Ron Phibun compares in Thailand

Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.

251stof 295 places in Thailand for sunshine, shared: 4.93 peak sun hours a day on flat ground.

−5%solar energy a year compared with the average place in Thailand: 1,434 against 1,509 kWh per kWp.

−20 mindaylight on the longest day, compared with Bangkok: 12 h 36 min against 12 h 56 min.

7°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); Ron Phibun ranks joint 251st. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.29 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 39 min, +20 min compared with Bangkok.

The sunniest places in Thailand

Solar forecast for Ron Phibun, 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 Ron Phibun

What is the best solar panel angle in Ron Phibun?
For a fixed array facing south, the best year-round tilt in Ron Phibun is 7°, worth about 1434 kWh per kWp a year. An off-grid system that has to get through November does better at about 19°.
What time is sunrise and sunset in Ron Phibun today?
On 25 October 2026 the sun rises at 06:08 and sets at 18:00 local time (UTC+7), giving 11 h 53 min of daylight. Solar noon is at 12:04.
How many peak sun hours does Ron Phibun get?
On a flat surface 4.9 hours a day averaged over the year, from 4.0 in December to 5.9 in March. Panels tilted at 70° receive 1.6 sun hours a day in June.
How high does the sun get in Ron Phibun?
At solar noon the sun stands 74.7° above the horizon on the June solstice and 58.4° on the December solstice.
Is Ron Phibun a good place for solar panels?
With 4.9 peak sun hours a day on flat ground, Ron Phibun ranks joint 251st of 295 places in Thailand for sunshine. A 1 kWp array at the best angle (7°) makes about 1,434 kWh a year here, 5% less than the average place in Thailand.

Places near Ron Phibun

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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.