Solarposition.org

Rio Negro · Argentina · 38.99° S · 64.10° W

Solar position in Río Colorado

Sun position, daylight and the best solar panel angle for Río Colorado — computed for 38.99° S, 64.10° W, 76 m above sea level.

Sunrise today06:17106° ESE
Sunset today19:44254° WSW
Best panel angle34°year-round, facing north
Off-grid angle64°best for the darkest month

The sun right now

Azimuth180.0°
Elevation62.9°
At solar noon, 13:00Open on the sun map

Sun in Río Colorado today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn04:40sun 18° below horizon
Nautical dawn05:1512° below
Civil dawn05:496° below
Sunrise06:17106° ESE
Golden hour ends06:53sun 6° up
Solar noon13:0062.9° high
Golden hour starts19:08sun 6° up
Sunset19:44254° WSW
Civil dusk20:126° below
Nautical dusk20:4612° below
Astronomical dusk21:2218° below
Day length13 h 27 min

Sun path diagram for Río Colorado

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 solstice91011121314151617EquinoxDecember solstice67891011121314151617181920Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 27.6° at solar noon in Río Colorado; on the December solstice only 74.5°. Sunrise swings from 60° ENE in June to 122° ESE in December — a 62° 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
January06:1413:2720:4014 h 25 min70.8°
February06:5113:2920:0813 h 17 min61.4°
March07:2013:2319:2512 h 06 min50.6°
April07:5013:1418:3910 h 49 min39.0°
May08:1713:1218:079 h 50 min30.8°
June08:3513:1818:019 h 26 min27.6°
July08:2813:2218:179 h 50 min30.7°
August07:5413:1918:4410 h 50 min39.1°
September07:0713:0919:1212 h 05 min50.5°
October06:2113:0119:4113 h 20 min61.9°
November05:4913:0220:1514 h 27 min71.0°
December05:4713:1420:4114 h 55 min74.5°

A year of daylight in Río Colorado

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 Río Colorado

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

34°collects the most energy over a year: 1693 kWh per kWp.

64°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 34°Best worst-month 64°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°144385%1.564.1×
15°161595%2.262.8×
30°1691100%2.812.1×
34° year-round best1693100%2.922.0×
39° = latitude1687100%3.051.8×
45°166598%3.181.7×
60°154091%3.341.5×
64° off-grid best149288%3.351.4×
70°140783%3.331.3×
90°104462%3.042.0×

A fixed array in Río Colorado produces the most over a year at 34°. The design month for an off-grid system is June: at 64° it makes 3.35 kWh per kWp a day, 15% more than at 34°, and costs 12% of the yearly total. Why steep panels win winter.

Off-grid solar in Río Colorado at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 34° (year-round best).

01234567January: 3.61 (70°)3.6JanFebruary: 4.12 (70°)4.1FebMarch: 4.49 (70°)4.5MarApril: 4.39 (70°)4.4AprMay: 3.48 (70°)3.5MayJune: 3.33 (70°)3.3JunJuly: 3.53 (70°)3.5JulAugust: 3.90 (70°)3.9AugSeptember: 4.24 (70°)4.2SepOctober: 4.02 (70°)4.0OctNovember: 3.72 (70°)3.7NovDecember: 3.45 (70°)3.5Dec34°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 34°Mean temp.
January7.934.433.615.8625.2 °C
February6.815.014.125.7123.6 °C
March5.325.374.495.2520.3 °C
April3.705.144.394.4115.1 °C
May2.374.003.483.2110.5 °C
June1.953.793.332.927.1 °C
July2.184.003.533.166.4 °C
August3.034.463.903.818.6 °C
September4.394.914.244.6911.8 °C
October5.744.734.025.2015.5 °C
November7.264.463.725.7019.9 °C
December8.034.213.455.8223.4 °C
Year4.88 avg4.54 avg1407 kWh1693 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 350 Wp of panels at 70°, versus 400 Wp at 34°. The steep array is 12% smaller for the same winter. Size your own system.

Row spacing in Río Colorado

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.

4.8 mrow pitch at 70°

4.1 mrow pitch at 34°

Row spacing calculator

How Río Colorado compares in Argentina

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

147thof 314 places in Argentina for sunshine, shared: 4.88 peak sun hours a day on flat ground.

+3%solar energy a year compared with the average place in Argentina: 1,694 against 1,639 kWh per kWp.

+26 mindaylight on the longest day, compared with Buenos Aires: 14 h 55 min against 14 h 29 min.

34°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); Río Colorado ranks joint 147th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.34 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 9 h 26 min, −24 min compared with Buenos Aires.

The sunniest places in Argentina

Solar forecast for Río Colorado, 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 Río Colorado

What is the best solar panel angle in Río Colorado?
For a fixed array facing north, the best year-round tilt in Río Colorado is 34°, worth about 1693 kWh per kWp a year. An off-grid system that has to get through June does better at about 64°.
What time is sunrise and sunset in Río Colorado today?
On 24 October 2026 the sun rises at 06:17 and sets at 19:44 local time (UTC−3), giving 13 h 27 min of daylight. Solar noon is at 13:00.
How many peak sun hours does Río Colorado get?
On a flat surface 4.9 hours a day averaged over the year, from 2.0 in June to 8.0 in December. Panels tilted at 70° receive 3.8 sun hours a day in June.
How high does the sun get in Río Colorado?
At solar noon the sun stands 27.6° above the horizon on the June solstice and 74.5° on the December solstice.
Is Río Colorado a good place for solar panels?
With 4.9 peak sun hours a day on flat ground, Río Colorado ranks joint 147th of 314 places in Argentina for sunshine. A 1 kWp array at the best angle (34°) makes about 1,694 kWh a year here, 3% more than the average place in Argentina.

Places near Río Colorado

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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.