Central Luzon · Philippines · 15.00° N · 120.78° E
Solar position in San Simon
Sun position, daylight and the best solar panel angle for San Simon — computed for 15.00° N, 120.78° E, 11 m above sea level.
The sun right now
Sun in San Simon today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:38 | sun 18° below horizon |
| Nautical dawn | 05:03 | 12° below |
| Civil dawn | 05:28 | 6° below |
| Sunrise | 05:50 | 102° ESE |
| Golden hour ends | 06:19 | sun 6° up |
| Solar noon | 11:40 | 62.9° high |
| Golden hour starts | 17:02 | sun 6° up |
| Sunset | 17:31 | 258° WSW |
| Civil dusk | 17:53 | 6° below |
| Nautical dusk | 18:18 | 12° below |
| Astronomical dusk | 18:43 | 18° below |
| Day length | 11 h 41 min | |
Sun path diagram for San Simon
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 81.6° at solar noon in San Simon; on the December solstice only 51.6°. 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 | 06:26 | 12:08 | 17:49 | 11 h 23 min | 55.1° |
| February | 06:18 | 12:10 | 18:02 | 11 h 44 min | 64.4° |
| March | 06:00 | 12:04 | 18:07 | 12 h 07 min | 75.2° |
| April | 05:39 | 11:55 | 18:12 | 12 h 33 min | 86.8° |
| May | 05:27 | 11:53 | 18:19 | 12 h 53 min | 84.8° |
| June | 05:28 | 11:58 | 18:29 | 13 h 01 min | 81.6° |
| July | 05:36 | 12:03 | 18:29 | 12 h 53 min | 84.5° |
| August | 05:43 | 12:00 | 18:16 | 12 h 33 min | 87.1° |
| September | 05:45 | 11:50 | 17:54 | 12 h 08 min | 75.7° |
| October | 05:49 | 11:41 | 17:33 | 11 h 44 min | 64.3° |
| November | 06:01 | 11:42 | 17:24 | 11 h 23 min | 55.1° |
| December | 06:17 | 11:54 | 17:31 | 11 h 14 min | 51.6° |
A year of daylight in San Simon
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 San Simon
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: 1478 kWh per kWp.
8°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° | 1440 | 97% | 3.46 | 1.6× |
| 8° off-grid best | 1470 | 99% | 3.42 | 1.5× |
| 14° year-round best | 1478 | 100% | 3.37 | 1.5× |
| 15° = latitude | 1478 | 100% | 3.35 | 1.5× |
| 30° | 1433 | 97% | 3.08 | 1.5× |
| 45° | 1310 | 89% | 2.66 | 1.7× |
| 60° | 1117 | 76% | 2.11 | 2.2× |
| 70° | 960 | 65% | 1.70 | 2.7× |
| 90° | 652 | 44% | 1.02 | 2.9× |
A fixed array in San Simon produces the most over a year at 14°. The design month for an off-grid system is August: at 8° it makes 3.42 kWh per kWp a day, 2% more than at 14°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in San Simon 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 | 4.39 | 4.60 | 3.78 | 3.96 | 24.9 °C |
| February | 5.14 | 4.52 | 3.70 | 4.46 | 25.5 °C |
| March | 5.87 | 3.98 | 3.23 | 4.84 | 26.8 °C |
| April | 6.41 | 2.96 | 2.37 | 4.97 | 28.4 °C |
| May | 5.89 | 2.09 | 1.65 | 4.40 | 28.5 °C |
| June | 5.31 | 1.81 | 1.42 | 3.92 | 27.7 °C |
| July | 4.76 | 1.84 | 1.45 | 3.56 | 27.0 °C |
| August | 4.37 | 2.14 | 1.70 | 3.37 | 26.8 °C |
| September | 4.76 | 2.91 | 2.35 | 3.81 | 26.8 °C |
| October | 4.68 | 3.66 | 2.98 | 3.92 | 26.7 °C |
| November | 4.33 | 4.24 | 3.46 | 3.82 | 26.3 °C |
| December | 3.99 | 4.33 | 3.54 | 3.61 | 25.5 °C |
| Year | 4.99 avg | 3.25 avg | 960 kWh | 1478 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 830 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 San Simon
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 14°
How San Simon compares in the Philippines
Against the other 519 places in the Philippines with climate data, for a fixed array at its best angle.
262ndof 520 places in the Philippines for sunshine, shared: 4.99 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in the Philippines: 1,478 against 1,467 kWh per kWp.
+1 mindaylight on the longest day, compared with Quezon City: 13 h 01 min against 13 h 00 min.
14°best year-round tilt here; across the Philippines it runs from 4° in Bongao to 18° in Vigan.
Of the 520 places in the Philippines, Jolo gets the most sun (5.36 peak sun hours a day) and Pangil the least (4.68); San Simon ranks joint 262nd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.42 kWh a day here, against 1.34 kWh on average in the Philippines. The shortest day lasts 11 h 14 min, −1 min compared with Quezon City.
Solar forecast for San Simon, 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 San Simon
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Places near San Simon
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A free, live card for San Simon: 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.