Solarposition.org

Chaco · Argentina · 25.95° S · 60.62° W

Solar position in Juan José Castelli

Sun position, daylight and the best solar panel angle for Juan José Castelli — computed for 25.95° S, 60.62° W, 113 m above sea level.

Sunrise today06:19104° ESE
Sunset today19:14256° WSW
Best panel angle23°year-round, facing north
Off-grid angle50°best for the darkest month

The sun right now

Azimuth180.0°
Elevation76.0°
At solar noon, 12:46Open on the sun map

Sun in Juan José Castelli today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn04:59sun 18° below horizon
Nautical dawn05:2712° below
Civil dawn05:556° below
Sunrise06:19104° ESE
Golden hour ends06:50sun 6° up
Solar noon12:4676.0° high
Golden hour starts18:43sun 6° up
Sunset19:14256° WSW
Civil dusk19:376° below
Nautical dusk20:0612° below
Astronomical dusk20:3418° below
Day length12 h 55 min

Sun path diagram for Juan José Castelli

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 solstice89101112131415161718EquinoxDecember solstice78910111213141516171819Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 40.6° at solar noon in Juan José Castelli; on the December solstice only 87.5°. Sunrise swings from 64° ENE in June to 117° ESE in December — a 53° 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
January06:2913:1319:5813 h 29 min83.9°
February06:5113:1519:4012 h 48 min74.4°
March07:0613:0919:1212 h 06 min63.6°
April07:2113:0018:4011 h 20 min52.0°
May07:3612:5818:2110 h 45 min43.8°
June07:4813:0418:1910 h 31 min40.6°
July07:4613:0918:3110 h 45 min43.7°
August07:2513:0518:4511 h 20 min52.1°
September06:5312:5518:5812 h 05 min63.5°
October06:2212:4719:1212 h 50 min74.9°
November06:0312:4819:3313 h 30 min84.1°
December06:0713:0019:5313 h 46 min87.5°

A year of daylight in Juan José Castelli

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 Juan José Castelli

Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

23°collects the most energy over a year: 1542 kWh per kWp.

50°gives the most in the darkest month — the one an off-grid system is sized for.

30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 23°Best worst-month 50°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°143593%2.242.4×
15°152999%2.791.8×
23° year-round best1542100%3.011.6×
26° = latitude1541100%3.081.5×
30°153399%3.171.5×
45°144794%3.361.3×
50° off-grid best140091%3.371.3×
60°127983%3.341.5×
70°112973%3.221.9×
90°77550%2.713.1×

A fixed array in Juan José Castelli produces the most over a year at 23°. The design month for an off-grid system is June: at 50° it makes 3.37 kWh per kWp a day, 12% more than at 23°, and costs 9% of the yearly total. Why steep panels win winter.

Off-grid solar in Juan José Castelli at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 23° (year-round best).

0123456January: 2.27 (70°)2.3JanFebruary: 2.77 (70°)2.8FebMarch: 3.27 (70°)3.3MarApril: 3.48 (70°)3.5AprMay: 3.48 (70°)3.5MayJune: 3.22 (70°)3.2JunJuly: 3.78 (70°)3.8JulAugust: 3.97 (70°)4.0AugSeptember: 3.49 (70°)3.5SepOctober: 2.88 (70°)2.9OctNovember: 2.38 (70°)2.4NovDecember: 2.10 (70°)2.1Dec23°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 23°Mean temp.
January6.702.852.274.8629.1 °C
February6.103.452.774.7528.4 °C
March5.284.023.274.5026.5 °C
April4.134.213.483.9123.0 °C
May3.294.133.483.4318.7 °C
June2.793.803.223.0117.0 °C
July3.274.453.783.5616.5 °C
August4.134.723.974.1718.9 °C
September4.874.203.494.4021.8 °C
October5.603.542.884.5325.7 °C
November6.512.952.384.8526.7 °C
December6.672.632.104.7628.3 °C
Year4.94 avg3.75 avg1129 kWh1542 kWh

Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 560 Wp of panels at 70°, versus 390 Wp at 23°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Juan José Castelli

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.

3.1 mrow pitch at 70°

2.9 mrow pitch at 23°

Row spacing calculator

How Juan José Castelli compares in Argentina

Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.

105thof 314 places in Argentina for sunshine, shared: 4.94 peak sun hours a day on flat ground.

−6%solar energy a year compared with the average place in Argentina: 1,542 against 1,639 kWh per kWp.

−43 mindaylight on the longest day, compared with Buenos Aires: 13 h 46 min against 14 h 29 min.

23°best year-round tilt here; across Argentina it runs from 21° in Tartagal to 44° in Río Gallegos.

Of the 314 places in Argentina, Belén gets the most sun (6.11 peak sun hours a day) and Ushuaia the least (2.59); Juan José Castelli ranks joint 105th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.10 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 10 h 31 min, +41 min compared with Buenos Aires.

The sunniest places in Argentina

Solar forecast for Juan José Castelli, 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 Juan José Castelli

What is the best solar panel angle in Juan José Castelli?
For a fixed array facing north, the best year-round tilt in Juan José Castelli is 23°, worth about 1542 kWh per kWp a year. An off-grid system that has to get through June does better at about 50°.
What time is sunrise and sunset in Juan José Castelli today?
On 24 October 2026 the sun rises at 06:19 and sets at 19:14 local time (UTC−3), giving 12 h 55 min of daylight. Solar noon is at 12:46.
How many peak sun hours does Juan José Castelli get?
On a flat surface 4.9 hours a day averaged over the year, from 2.8 in June to 6.7 in January. Panels tilted at 70° receive 2.6 sun hours a day in December.
How high does the sun get in Juan José Castelli?
At solar noon the sun stands 40.6° above the horizon on the June solstice and 87.5° on the December solstice.
Is Juan José Castelli a good place for solar panels?
With 4.9 peak sun hours a day on flat ground, Juan José Castelli ranks joint 105th of 314 places in Argentina for sunshine. A 1 kWp array at the best angle (23°) makes about 1,542 kWh a year here, 6% less than the average place in Argentina.

Places near Juan José Castelli

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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.