Solarposition.org

Salta · Argentina · 24.99° S · 65.58° W

Solar position in Rosario de Lerma

Sun position, daylight and the best solar panel angle for Rosario de Lerma — computed for 24.99° S, 65.58° W, 1421 m above sea level.

Sunrise today06:40103° ESE
Sunset today19:32256° WSW
Best panel angle26°year-round, facing north
Off-grid angle26°best for the darkest month

The sun right now

Azimuth180.0°
Elevation76.9°
At solar noon, 13:06Open on the sun map

Sun in Rosario de Lerma today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn05:20sun 18° below horizon
Nautical dawn05:4912° below
Civil dawn06:166° below
Sunrise06:40103° ESE
Golden hour ends07:11sun 6° up
Solar noon13:0676.9° high
Golden hour starts19:02sun 6° up
Sunset19:32256° WSW
Civil dusk19:566° below
Nautical dusk20:2412° below
Astronomical dusk20:5218° below
Day length12 h 53 min

Sun path diagram for Rosario de Lerma

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 solstice9101112131415161718EquinoxDecember solstice7891011121314151617181920Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 41.6° at solar noon in Rosario de Lerma; on the December solstice only 88.5°. Sunrise swings from 64° ENE in June to 116° ESE in December — a 52° 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
January06:5013:3320:1613 h 25 min84.8°
February07:1213:3519:5812 h 47 min75.4°
March07:2613:2919:3212 h 06 min64.6°
April07:3913:2019:0111 h 22 min53.0°
May07:5413:1818:4310 h 49 min44.7°
June08:0613:2418:4110 h 35 min41.6°
July08:0413:2818:5210 h 48 min44.7°
August07:4413:2519:0611 h 22 min53.1°
September07:1213:1519:1812 h 05 min64.5°
October06:4213:0619:3112 h 48 min75.9°
November06:2513:0819:5113 h 26 min85.0°
December06:2913:2020:1113 h 42 min88.5°

A year of daylight in Rosario de Lerma

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 Rosario de Lerma

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

26°collects the most energy over a year: 1833 kWh per kWp.

26°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 26°Best worst-month 26°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearMay kWh/kWp/dayBest ÷ worst month
0°166691%3.421.8×
15°180398%4.241.4×
25° = latitude1833100%4.641.3×
26° year-round best off-grid best1833100%4.681.2×
30°1829100%4.801.3×
45°174795%5.041.6×
60°156185%4.972.1×
70°138876%4.752.6×
90°97153%3.914.5×

A fixed array in Rosario de Lerma produces the most over a year at 26°. The design month for an off-grid system is May: at 26° it makes 4.68 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.

Off-grid solar in Rosario de Lerma at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 26° (year-round best).

01234567January: 2.20 (70°)2.2JanFebruary: 2.72 (70°)2.7FebMarch: 3.40 (70°)3.4MarApril: 4.19 (70°)4.2AprMay: 4.75 (70°)4.8MayJune: 5.10 (70°)5.1JunJuly: 5.40 (70°)5.4JulAugust: 5.37 (70°)5.4AugSeptember: 4.58 (70°)4.6SepOctober: 3.36 (70°)3.4OctNovember: 2.45 (70°)2.5NovDecember: 2.04 (70°)2.0Dec26°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 26°Mean temp.
January6.422.662.204.6919.2 °C
February5.943.262.724.7118.3 °C
March5.404.023.404.7517.1 °C
April4.764.914.194.7614.8 °C
May4.135.494.754.6811.6 °C
June3.895.865.104.7010.1 °C
July4.256.205.405.079.7 °C
August5.206.225.375.6311.9 °C
September6.175.354.585.8214.4 °C
October6.683.993.365.5017.7 °C
November7.012.952.455.2019.0 °C
December6.672.482.044.7519.4 °C
Year5.54 avg4.46 avg1388 kWh1833 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 580 Wp of panels at 70°, versus 250 Wp at 26°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Rosario de Lerma

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 26°

Row spacing calculator

How Rosario de Lerma compares in Argentina

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

16thof 314 places in Argentina for sunshine: 5.54 peak sun hours a day on flat ground.

+12%solar energy a year compared with the average place in Argentina: 1,833 against 1,639 kWh per kWp.

−47 mindaylight on the longest day, compared with Buenos Aires: 13 h 42 min against 14 h 29 min.

26°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); Rosario de Lerma ranks 16th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.04 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 10 h 35 min, +45 min compared with Buenos Aires.

The sunniest places in Argentina

Solar forecast for Rosario de Lerma, 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 Rosario de Lerma

What is the best solar panel angle in Rosario de Lerma?
For a fixed array facing north, the best year-round tilt in Rosario de Lerma is 26°, worth about 1833 kWh per kWp a year. An off-grid system that has to get through May does better at about 26°.
What time is sunrise and sunset in Rosario de Lerma today?
On 24 October 2026 the sun rises at 06:40 and sets at 19:32 local time (UTC−3), giving 12 h 53 min of daylight. Solar noon is at 13:06.
How many peak sun hours does Rosario de Lerma get?
On a flat surface 5.5 hours a day averaged over the year, from 3.9 in June to 7.0 in November. Panels tilted at 70° receive 2.5 sun hours a day in December.
How high does the sun get in Rosario de Lerma?
At solar noon the sun stands 41.6° above the horizon on the June solstice and 88.5° on the December solstice.
Is Rosario de Lerma a good place for solar panels?
With 5.5 peak sun hours a day on flat ground, Rosario de Lerma ranks 16th of 314 places in Argentina for sunshine. A 1 kWp array at the best angle (26°) makes about 1,833 kWh a year here, 12% more than the average place in Argentina.

Places near Rosario de Lerma

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.