Solarposition.org

Tierra del Fuego · Argentina · 53.79° S · 67.71° W

Solar position in Río Grande

Sun position, daylight and the best solar panel angle for Río Grande — computed for 53.79° S, 67.71° W, 9 m above sea level.

Sunrise today06:02111° ESE
Sunset today20:28248° WSW
Best panel angle44°year-round, facing north
Off-grid angle77°best for the darkest month

The sun right now

Azimuth180.0°
Elevation48.1°
At solar noon, 13:15Open on the sun map

Sun in Río Grande today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn03:35sun 18° below horizon
Nautical dawn04:3412° below
Civil dawn05:236° below
Sunrise06:02111° ESE
Golden hour ends06:50sun 6° up
Solar noon13:1548.1° high
Golden hour starts19:40sun 6° up
Sunset20:28248° WSW
Civil dusk21:076° below
Nautical dusk21:5712° below
Astronomical dusk22:5718° below
Day length14 h 26 min

Sun path diagram for Río Grande

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 solstice11121314151617EquinoxDecember solstice6789101112131415161718192021Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 12.8° at solar noon in Río Grande; on the December solstice only 59.7°. Sunrise swings from 49° NE in June to 134° SE in December — a 85° 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
January05:3613:4221:4616 h 10 min56.0°
February06:3913:4420:4714 h 08 min46.6°
March07:3413:3719:4012 h 06 min35.8°
April08:3013:2918:279 h 57 min24.2°
May09:2113:2717:328 h 11 min16.0°
June09:5013:3217:157 h 25 min12.8°
July09:3213:3717:428 h 10 min15.9°
August08:3513:3418:339 h 58 min24.3°
September07:2113:2419:2712 h 05 min35.7°
October06:0913:1520:2214 h 13 min47.1°
November05:1013:1621:2316 h 13 min56.2°
December04:5513:2822:0217 h 06 min59.7°

A year of daylight in Río Grande

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 Grande

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

44°collects the most energy over a year: 1268 kWh per kWp.

77°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 44°Best worst-month 77°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°95775%0.4013.1×
15°112889%0.806.8×
30°123497%1.154.7×
44° year-round best1268100%1.413.6×
45°1268100%1.433.6×
54° = latitude125499%1.553.1×
60°122997%1.612.8×
70°116492%1.672.4×
77° off-grid best110187%1.682.3×
90°94975%1.641.9×

A fixed array in Río Grande produces the most over a year at 44°. The design month for an off-grid system is June: at 77° it makes 1.68 kWh per kWp a day, 19% more than at 44°, and costs 13% of the yearly total. Why steep panels win winter.

Off-grid solar in Río Grande at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 44° (year-round best).

0123456January: 3.87 (70°)3.9JanFebruary: 3.98 (70°)4.0FebMarch: 3.46 (70°)3.5MarApril: 2.93 (70°)2.9AprMay: 2.15 (70°)2.1MayJune: 1.67 (70°)1.7JunJuly: 1.94 (70°)1.9JulAugust: 2.75 (70°)2.8AugSeptember: 3.52 (70°)3.5SepOctober: 4.05 (70°)4.1OctNovember: 4.04 (70°)4.0NovDecember: 3.96 (70°)4.0Dec44°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 44°Mean temp.
January5.754.473.874.909.2 °C
February4.764.583.984.659.2 °C
March3.163.963.463.678.0 °C
April1.823.312.932.805.8 °C
May0.922.422.151.893.8 °C
June0.571.881.671.411.7 °C
July0.722.171.941.671.1 °C
August1.443.072.752.541.5 °C
September2.713.953.523.573.1 °C
October4.314.584.054.564.9 °C
November5.604.614.045.006.6 °C
December6.184.553.965.118.3 °C
Year3.15 avg3.62 avg1164 kWh1268 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 710 Wp of panels at 70°, versus 830 Wp at 44°. The steep array is 15% smaller for the same winter. Size your own system.

Row spacing in Río Grande

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.

11.8 mrow pitch at 70°

9.6 mrow pitch at 44°

Row spacing calculator

How Río Grande compares in Argentina

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

313thof 314 places in Argentina for sunshine: 3.16 peak sun hours a day on flat ground.

−23%solar energy a year compared with the average place in Argentina: 1,268 against 1,639 kWh per kWp.

+2 h 37 mindaylight on the longest day, compared with Buenos Aires: 17 h 06 min against 14 h 29 min.

44°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 Grande ranks 313th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.67 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 7 h 25 min, −2 h 25 min compared with Buenos Aires.

The sunniest places in Argentina

Solar forecast for Río Grande, 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 Grande

What is the best solar panel angle in Río Grande?
For a fixed array facing north, the best year-round tilt in Río Grande is 44°, worth about 1268 kWh per kWp a year. An off-grid system that has to get through June does better at about 77°.
What time is sunrise and sunset in Río Grande today?
On 24 October 2026 the sun rises at 06:02 and sets at 20:28 local time (UTC−3), giving 14 h 26 min of daylight. Solar noon is at 13:15.
How many peak sun hours does Río Grande get?
On a flat surface 3.2 hours a day averaged over the year, from 0.6 in June to 6.2 in December. Panels tilted at 70° receive 1.9 sun hours a day in June.
How high does the sun get in Río Grande?
At solar noon the sun stands 12.8° above the horizon on the June solstice and 59.7° on the December solstice.
Is Río Grande a good place for solar panels?
With 3.2 peak sun hours a day on flat ground, Río Grande ranks 313th of 314 places in Argentina for sunshine. A 1 kWp array at the best angle (44°) makes about 1,268 kWh a year here, 23% less than the average place in Argentina.

Places near Río Grande

All places in Argentina

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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.