Udon Thani · Thailand · 17.77° N · 102.19° E
Solar position in Nam Som
Sun position, daylight and the best solar panel angle for Nam Som — computed for 17.77° N, 102.19° E, 231 m above sea level.
The sun right now
Sun in Nam Som today
Saturday, 24 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:54 | sun 18° below horizon |
| Nautical dawn | 05:19 | 12° below |
| Civil dawn | 05:44 | 6° below |
| Sunrise | 06:07 | 102° ESE |
| Golden hour ends | 06:36 | sun 6° up |
| Solar noon | 11:55 | 60.5° high |
| Golden hour starts | 17:14 | sun 6° up |
| Sunset | 17:43 | 258° WSW |
| Civil dusk | 18:05 | 6° below |
| Nautical dusk | 18:31 | 12° below |
| Astronomical dusk | 18:56 | 18° below |
| Day length | 11 h 36 min | |
Sun path diagram for Nam Som
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 84.3° at solar noon in Nam Som; on the December solstice only 48.8°. 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 | 06:45 | 12:22 | 17:59 | 11 h 14 min | 52.3° |
| February | 06:35 | 12:24 | 18:14 | 11 h 40 min | 61.7° |
| March | 06:14 | 12:18 | 18:22 | 12 h 07 min | 72.5° |
| April | 05:51 | 12:10 | 18:29 | 12 h 38 min | 84.1° |
| May | 05:37 | 12:07 | 18:38 | 13 h 02 min | 87.6° |
| June | 05:37 | 12:12 | 18:48 | 13 h 12 min | 84.3° |
| July | 05:46 | 12:17 | 18:48 | 13 h 02 min | 87.3° |
| August | 05:55 | 12:14 | 18:33 | 12 h 39 min | 84.3° |
| September | 06:00 | 12:04 | 18:08 | 12 h 09 min | 72.9° |
| October | 06:06 | 11:55 | 17:45 | 11 h 39 min | 61.5° |
| November | 06:19 | 11:56 | 17:34 | 11 h 14 min | 52.3° |
| December | 06:37 | 12:09 | 17:41 | 11 h 04 min | 48.8° |
A year of daylight in Nam Som
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 Nam Som
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
20°collects the most energy over a year: 1491 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 | August kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1420 | 95% | 3.55 | 1.2× |
| 1° off-grid best | 1427 | 96% | 3.55 | 1.2× |
| 15° | 1487 | 100% | 3.48 | 1.3× |
| 18° = latitude | 1491 | 100% | 3.45 | 1.3× |
| 20° year-round best | 1491 | 100% | 3.42 | 1.3× |
| 30° | 1473 | 99% | 3.24 | 1.5× |
| 45° | 1380 | 93% | 2.84 | 1.8× |
| 60° | 1215 | 81% | 2.32 | 2.3× |
| 70° | 1071 | 72% | 1.92 | 2.7× |
| 90° | 758 | 51% | 1.15 | 3.2× |
A fixed array in Nam Som produces the most over a year at 20°. The design month for an off-grid system is August: at 1° it makes 3.55 kWh per kWp a day, 4% more than at 20°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Nam Som at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 20° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 20° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.65 | 5.27 | 4.39 | 4.54 | 21.2 °C |
| February | 5.12 | 4.69 | 3.86 | 4.60 | 24.5 °C |
| March | 5.16 | 3.70 | 2.99 | 4.25 | 27.6 °C |
| April | 5.64 | 3.05 | 2.43 | 4.32 | 29.8 °C |
| May | 5.36 | 2.36 | 1.87 | 3.94 | 28.5 °C |
| June | 5.00 | 2.13 | 1.69 | 3.63 | 27.1 °C |
| July | 4.68 | 2.12 | 1.69 | 3.44 | 26.4 °C |
| August | 4.49 | 2.39 | 1.92 | 3.42 | 26.0 °C |
| September | 4.63 | 3.00 | 2.44 | 3.72 | 25.8 °C |
| October | 4.78 | 3.92 | 3.21 | 4.13 | 24.6 °C |
| November | 4.81 | 5.13 | 4.25 | 4.57 | 22.7 °C |
| December | 4.52 | 5.42 | 4.53 | 4.51 | 20.4 °C |
| Year | 4.90 avg | 3.59 avg | 1071 kWh | 1491 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 700 Wp of panels at 70°, versus 350 Wp at 20°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Nam Som
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.
2.5 mrow pitch at 70°
2.5 mrow pitch at 20°
How Nam Som compares in Thailand
Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.
261stof 295 places in Thailand for sunshine, shared: 4.90 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in Thailand: 1,491 against 1,509 kWh per kWp.
+15 mindaylight on the longest day, compared with Bangkok: 13 h 12 min against 12 h 56 min.
20°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); Nam Som ranks joint 261st. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.69 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 04 min, −15 min compared with Bangkok.
Solar forecast for Nam Som, 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 Nam Som
What is the best solar panel angle in Nam Som?
What time is sunrise and sunset in Nam Som today?
How many peak sun hours does Nam Som get?
How high does the sun get in Nam Som?
Is Nam Som a good place for solar panels?
Places near Nam Som
Put this on your site
A free, live card for Nam Som: 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.