Thailand · 15.70° N · 100.14° E
Solar position in Nakhon Sawan
Sun position, daylight and the best solar panel angle for Nakhon Sawan — computed for 15.70° N, 100.14° E, 31 m above sea level.
The sun right now
Sun in Nakhon Sawan today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:01 | sun 18° below horizon |
| Nautical dawn | 05:26 | 12° below |
| Civil dawn | 05:51 | 6° below |
| Sunrise | 06:13 | 102° ESE |
| Golden hour ends | 06:42 | sun 6° up |
| Solar noon | 12:03 | 62.2° high |
| Golden hour starts | 17:23 | sun 6° up |
| Sunset | 17:53 | 258° WSW |
| Civil dusk | 18:15 | 6° below |
| Nautical dusk | 18:40 | 12° below |
| Astronomical dusk | 19:05 | 18° below |
| Day length | 11 h 39 min | |
Sun path diagram for Nakhon Sawan
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 82.3° at solar noon in Nakhon Sawan; on the December solstice only 50.9°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 49° 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 | 06:50 | 12:30 | 18:11 | 11 h 21 min | 54.4° |
| February | 06:41 | 12:33 | 18:24 | 11 h 43 min | 63.8° |
| March | 06:23 | 12:26 | 18:30 | 12 h 07 min | 74.5° |
| April | 06:01 | 12:18 | 18:35 | 12 h 34 min | 86.2° |
| May | 05:48 | 12:16 | 18:43 | 12 h 55 min | 85.5° |
| June | 05:49 | 12:21 | 18:53 | 13 h 04 min | 82.3° |
| July | 05:58 | 12:25 | 18:53 | 12 h 56 min | 85.2° |
| August | 06:05 | 12:22 | 18:39 | 12 h 35 min | 86.4° |
| September | 06:08 | 12:12 | 18:16 | 12 h 08 min | 75.0° |
| October | 06:12 | 12:04 | 17:55 | 11 h 43 min | 63.6° |
| November | 06:24 | 12:05 | 17:45 | 11 h 21 min | 54.4° |
| December | 06:41 | 12:17 | 17:53 | 11 h 12 min | 50.9° |
A year of daylight in Nakhon Sawan
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 Nakhon Sawan
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: 1530 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 | August kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1478 | 97% | 3.83 | 1.3× |
| 3° off-grid best | 1495 | 98% | 3.83 | 1.2× |
| 15° | 1530 | 100% | 3.73 | 1.2× |
| 16° = latitude | 1530 | 100% | 3.72 | 1.2× |
| 17° year-round best | 1530 | 100% | 3.70 | 1.2× |
| 30° | 1498 | 98% | 3.45 | 1.4× |
| 45° | 1386 | 91% | 3.00 | 1.7× |
| 60° | 1202 | 79% | 2.42 | 2.2× |
| 70° | 1047 | 68% | 1.98 | 2.7× |
| 90° | 731 | 48% | 1.20 | 3.0× |
A fixed array in Nakhon Sawan produces the most over a year at 17°. The design month for an off-grid system is August: at 3° it makes 3.83 kWh per kWp a day, 3% more than at 17°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Nakhon Sawan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 17° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 17° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.78 | 5.14 | 4.23 | 4.44 | 24.2 °C |
| February | 5.25 | 4.61 | 3.75 | 4.56 | 27.2 °C |
| March | 5.48 | 3.78 | 3.04 | 4.46 | 29.4 °C |
| April | 6.03 | 3.03 | 2.40 | 4.60 | 30.9 °C |
| May | 5.69 | 2.30 | 1.82 | 4.20 | 29.1 °C |
| June | 5.37 | 2.08 | 1.64 | 3.93 | 27.6 °C |
| July | 5.08 | 2.17 | 1.72 | 3.77 | 26.8 °C |
| August | 4.84 | 2.47 | 1.98 | 3.70 | 26.4 °C |
| September | 4.80 | 3.02 | 2.44 | 3.83 | 26.2 °C |
| October | 4.76 | 3.75 | 3.06 | 4.03 | 25.7 °C |
| November | 4.81 | 4.85 | 3.99 | 4.39 | 24.4 °C |
| December | 4.67 | 5.32 | 4.40 | 4.44 | 23.2 °C |
| Year | 5.13 avg | 3.54 avg | 1047 kWh | 1530 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 720 Wp of panels at 70°, versus 320 Wp at 17°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Nakhon Sawan
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.
2.4 mrow pitch at 70°
2.4 mrow pitch at 17°
How Nakhon Sawan compares in Thailand
Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.
127thof 295 places in Thailand for sunshine, shared: 5.13 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Thailand: 1,530 against 1,509 kWh per kWp.
+7 mindaylight on the longest day, compared with Bangkok: 13 h 04 min against 12 h 56 min.
17°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); Nakhon Sawan ranks joint 127th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.64 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 12 min, −7 min compared with Bangkok.
Solar forecast for Nakhon Sawan, 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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A free, live card for Nakhon Sawan: 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.