Solarposition.org

Puerto Rico · 18.35° N · 66.01° W

Solar position in Trujillo Alto

Sun position, daylight and the best solar panel angle for Trujillo Alto — computed for 18.35° N, 66.01° W, 20 m above sea level.

Sunrise today06:20102° ESE
Sunset today17:55258° WSW
Best panel angle17°year-round, facing south
Off-grid angle24°best for the darkest month

The sun right now

Azimuth180.0°
Elevation59.7°
At solar noon, 12:08Open on the sun map

Sun in Trujillo Alto today

Saturday, 24 October 2026 · local time UTC−4

EventTimeDirection / height
Astronomical dawn05:07sun 18° below horizon
Nautical dawn05:3212° below
Civil dawn05:586° below
Sunrise06:20102° ESE
Golden hour ends06:50sun 6° up
Solar noon12:0859.7° high
Golden hour starts17:25sun 6° up
Sunset17:55258° WSW
Civil dusk18:176° below
Nautical dusk18:4312° below
Astronomical dusk19:0818° below
Day length11 h 35 min

Sun path diagram for Trujillo Alto

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 solstice6789101112131415161718EquinoxDecember solstice7891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 84.9° at solar noon in Trujillo Alto; on the December solstice only 48.2°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 50° 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
January06:5912:3518:1111 h 13 min51.9°
February06:4812:3718:2711 h 39 min61.3°
March06:2712:3118:3512 h 08 min72.1°
April06:0312:2218:4212 h 39 min83.7°
May05:4812:2018:5213 h 04 min88.1°
June05:4812:2519:0213 h 14 min84.9°
July05:5812:3019:0213 h 04 min88.0°
August06:0712:2718:4612 h 39 min83.6°
September06:1212:1618:2112 h 08 min72.2°
October06:1912:0817:5711 h 38 min60.8°
November06:3312:0917:4511 h 12 min51.6°
December06:5112:2217:5311 h 02 min48.2°

A year of daylight in Trujillo Alto

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 Trujillo Alto

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: 1629 kWh per kWp.

24°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 17°Best worst-month 24°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°156796%3.311.5×
15°1628100%3.951.2×
17° year-round best1629100%4.021.2×
18° = latitude1629100%4.051.2×
24° off-grid best162099%4.221.2×
30°159798%4.351.2×
45°147691%4.491.5×
60°127478%4.371.9×
70°110468%4.142.4×
90°75146%3.353.0×

A fixed array in Trujillo Alto produces the most over a year at 17°. The design month for an off-grid system is December: at 24° it makes 4.22 kWh per kWp a day, 5% more than at 17°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Trujillo Alto at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 17° (year-round best).

0123456January: 4.21 (70°)4.2JanFebruary: 4.06 (70°)4.1FebMarch: 3.44 (70°)3.4MarApril: 2.59 (70°)2.6AprMay: 1.95 (70°)1.9MayJune: 1.76 (70°)1.8JunJuly: 1.83 (70°)1.8JulAugust: 2.25 (70°)2.2AugSeptember: 2.91 (70°)2.9SepOctober: 3.43 (70°)3.4OctNovember: 3.81 (70°)3.8NovDecember: 4.14 (70°)4.1Dec17°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 17°Mean temp.
January4.505.154.214.2425.5 °C
February5.254.954.064.7025.4 °C
March5.824.203.444.8925.5 °C
April6.213.202.594.8826.2 °C
May5.972.441.954.4726.9 °C
June6.062.221.764.4327.7 °C
July6.092.311.834.4928.0 °C
August6.002.812.254.5828.3 °C
September5.643.612.914.5528.4 °C
October5.014.243.434.3028.0 °C
November4.404.693.814.0327.2 °C
December4.225.074.144.0226.3 °C
Year5.43 avg3.73 avg1104 kWh1629 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 670 Wp of panels at 70°, versus 290 Wp at 17°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Trujillo Alto

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.

2.6 mrow pitch at 70°

2.5 mrow pitch at 17°

Row spacing calculator

How Trujillo Alto compares in Puerto Rico

Against the other 20 places in Puerto Rico with climate data, for a fixed array at its best angle.

10thof 21 places in Puerto Rico for sunshine, shared: 5.43 peak sun hours a day on flat ground.

±0%solar energy a year compared with the average place in Puerto Rico: 1,629 against 1,627 kWh per kWp.

±0 mindaylight on the longest day, compared with San Juan: 13 h 14 min against 13 h 14 min.

17°best year-round tilt here; across Puerto Rico it runs from 17° in San Juan to 18° in Arecibo.

Of the 21 places in Puerto Rico, Guayama gets the most sun (5.56 peak sun hours a day) and Barceloneta and one other place the least (5.26); Trujillo Alto ranks joint 10th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.76 kWh a day here, against 1.75 kWh on average in Puerto Rico. The shortest day lasts 11 h 02 min, ±0 min compared with San Juan.

The sunniest places in Puerto Rico

Solar forecast for Trujillo Alto, 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 Trujillo Alto

What is the best solar panel angle in Trujillo Alto?
For a fixed array facing south, the best year-round tilt in Trujillo Alto is 17°, worth about 1629 kWh per kWp a year. An off-grid system that has to get through December does better at about 24°.
What time is sunrise and sunset in Trujillo Alto today?
On 24 October 2026 the sun rises at 06:20 and sets at 17:55 local time (UTC−4), giving 11 h 35 min of daylight. Solar noon is at 12:08.
How many peak sun hours does Trujillo Alto get?
On a flat surface 5.4 hours a day averaged over the year, from 4.2 in December to 6.2 in April. Panels tilted at 70° receive 2.2 sun hours a day in June.
How high does the sun get in Trujillo Alto?
At solar noon the sun stands 84.9° above the horizon on the June solstice and 48.2° on the December solstice.
Is Trujillo Alto a good place for solar panels?
With 5.4 peak sun hours a day on flat ground, Trujillo Alto ranks joint 10th of 21 places in Puerto Rico for sunshine. A 1 kWp array at the best angle (17°) makes about 1,629 kWh a year here, as much as the average place in Puerto Rico.

Places near Trujillo Alto

All places in Puerto Rico

Put this on your site

A free, live card for Trujillo Alto: 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.

Theme

Paste it into any page, blog or CMS that accepts HTML. Auto follows the visitor's light or dark system setting. Free to use with its link.

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.