Thailand · 18.15° N · 100.14° E
Solar position in Phrae
Sun position, daylight and the best solar panel angle for Phrae — computed for 18.15° N, 100.14° E, 162 m above sea level.
The sun right now
Sun in Phrae today
Saturday, 24 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:02 | sun 18° below horizon |
| Nautical dawn | 05:27 | 12° below |
| Civil dawn | 05:53 | 6° below |
| Sunrise | 06:15 | 102° ESE |
| Golden hour ends | 06:45 | sun 6° up |
| Solar noon | 12:03 | 60.1° high |
| Golden hour starts | 17:21 | sun 6° up |
| Sunset | 17:51 | 258° WSW |
| Civil dusk | 18:13 | 6° below |
| Nautical dusk | 18:39 | 12° below |
| Astronomical dusk | 19:04 | 18° below |
| Day length | 11 h 36 min | |
Sun path diagram for Phrae
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 84.7° at solar noon in Phrae; on the December solstice only 48.4°. 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 | 06:54 | 12:30 | 18:07 | 11 h 13 min | 52.0° |
| February | 06:43 | 12:33 | 18:22 | 11 h 39 min | 61.3° |
| March | 06:23 | 12:26 | 18:30 | 12 h 07 min | 72.1° |
| April | 05:58 | 12:18 | 18:37 | 12 h 39 min | 83.7° |
| May | 05:44 | 12:16 | 18:47 | 13 h 03 min | 88.0° |
| June | 05:44 | 12:21 | 18:57 | 13 h 13 min | 84.7° |
| July | 05:53 | 12:25 | 18:57 | 13 h 04 min | 87.7° |
| August | 06:02 | 12:22 | 18:42 | 12 h 39 min | 84.0° |
| September | 06:08 | 12:12 | 18:16 | 12 h 09 min | 72.6° |
| October | 06:14 | 12:03 | 17:53 | 11 h 39 min | 61.2° |
| November | 06:28 | 12:05 | 17:41 | 11 h 13 min | 52.0° |
| December | 06:46 | 12:17 | 17:48 | 11 h 03 min | 48.4° |
A year of daylight in Phrae
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 Phrae
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: 1503 kWh per kWp.
2°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° | 1430 | 95% | 3.53 | 1.3× |
| 2° off-grid best | 1444 | 96% | 3.53 | 1.3× |
| 15° | 1498 | 100% | 3.46 | 1.3× |
| 18° = latitude | 1502 | 100% | 3.43 | 1.4× |
| 20° year-round best | 1503 | 100% | 3.40 | 1.4× |
| 30° | 1485 | 99% | 3.23 | 1.5× |
| 45° | 1392 | 93% | 2.84 | 1.8× |
| 60° | 1225 | 81% | 2.33 | 2.2× |
| 70° | 1079 | 72% | 1.93 | 2.6× |
| 90° | 762 | 51% | 1.16 | 3.1× |
A fixed array in Phrae produces the most over a year at 20°. The design month for an off-grid system is August: at 2° it makes 3.53 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 Phrae 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 | 4.57 | 5.20 | 4.33 | 4.46 | 21.6 °C |
| February | 5.19 | 4.80 | 3.94 | 4.67 | 24.6 °C |
| March | 5.45 | 3.93 | 3.18 | 4.51 | 27.4 °C |
| April | 5.96 | 3.19 | 2.55 | 4.57 | 29.6 °C |
| May | 5.54 | 2.41 | 1.92 | 4.08 | 27.9 °C |
| June | 5.04 | 2.16 | 1.72 | 3.67 | 26.7 °C |
| July | 4.65 | 2.17 | 1.73 | 3.44 | 26.0 °C |
| August | 4.45 | 2.40 | 1.93 | 3.40 | 25.5 °C |
| September | 4.66 | 3.05 | 2.47 | 3.74 | 25.6 °C |
| October | 4.64 | 3.81 | 3.12 | 4.00 | 24.8 °C |
| November | 4.72 | 5.06 | 4.19 | 4.49 | 23.0 °C |
| December | 4.43 | 5.36 | 4.47 | 4.43 | 20.8 °C |
| Year | 4.94 avg | 3.62 avg | 1079 kWh | 1503 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 690 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 Phrae
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°
2.6 mrow pitch at 20°
How Phrae 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.
±0%solar energy a year compared with the average place in Thailand: 1,503 against 1,509 kWh per kWp.
+17 mindaylight on the longest day, compared with Bangkok: 13 h 13 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); Phrae ranks joint 245th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.72 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 03 min, −16 min compared with Bangkok.
Solar forecast for Phrae, 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 Phrae
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Places near Phrae
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A free, live card for Phrae: 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.