Buenos Aires · Argentina · 34.66° S · 58.37° W
Solar position in Avellaneda
Sun position, daylight and the best solar panel angle for Avellaneda — computed for 34.66° S, 58.37° W, 13 m above sea level.
The sun right now
Sun in Avellaneda today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:30 | sun 18° below horizon |
| Nautical dawn | 05:02 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 06:00 | 105° ESE |
| Golden hour ends | 06:34 | sun 6° up |
| Solar noon | 12:37 | 67.3° high |
| Golden hour starts | 18:41 | sun 6° up |
| Sunset | 19:15 | 255° WSW |
| Civil dusk | 19:41 | 6° below |
| Nautical dusk | 20:13 | 12° below |
| Astronomical dusk | 20:45 | 18° below |
| Day length | 13 h 15 min | |
Sun path diagram for Avellaneda
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 31.9° at solar noon in Avellaneda; on the December solstice only 78.8°. Sunrise swings from 62° ENE in June to 120° ESE in December — a 58° 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.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:02 | 13:04 | 20:06 | 14 h 04 min | 75.1° |
| February | 06:33 | 13:06 | 19:39 | 13 h 06 min | 65.7° |
| March | 06:57 | 13:00 | 19:03 | 12 h 06 min | 54.9° |
| April | 07:21 | 12:51 | 18:22 | 11 h 01 min | 43.3° |
| May | 07:44 | 12:49 | 17:55 | 10 h 11 min | 35.1° |
| June | 08:00 | 12:55 | 17:50 | 9 h 50 min | 31.9° |
| July | 07:55 | 13:00 | 18:05 | 10 h 10 min | 35.0° |
| August | 07:26 | 12:56 | 18:27 | 11 h 01 min | 43.4° |
| September | 06:44 | 12:46 | 18:49 | 12 h 05 min | 54.8° |
| October | 06:03 | 12:38 | 19:12 | 13 h 09 min | 66.2° |
| November | 05:36 | 12:39 | 19:42 | 14 h 06 min | 75.4° |
| December | 05:37 | 12:51 | 20:06 | 14 h 29 min | 78.8° |
A year of daylight in Avellaneda
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Avellaneda
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
30°collects the most energy over a year: 1596 kWh per kWp.
58°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1412 | 89% | 1.80 | 3.4× |
| 15° | 1550 | 97% | 2.45 | 2.4× |
| 30° year-round best | 1596 | 100% | 2.94 | 1.9× |
| 35° = latitude | 1590 | 100% | 3.06 | 1.7× |
| 45° | 1547 | 97% | 3.25 | 1.5× |
| 58° off-grid best | 1433 | 90% | 3.35 | 1.3× |
| 60° | 1409 | 88% | 3.35 | 1.3× |
| 70° | 1273 | 80% | 3.30 | 1.4× |
| 90° | 919 | 58% | 2.93 | 2.2× |
A fixed array in Avellaneda produces the most over a year at 30°. The design month for an off-grid system is June: at 58° it makes 3.35 kWh per kWp a day, 14% more than at 30°, and costs 10% of the yearly total. Why steep panels win winter.
Off-grid solar in Avellaneda at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 30° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 30° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.22 | 3.76 | 3.06 | 5.36 | 24.7 °C |
| February | 6.33 | 4.28 | 3.52 | 5.18 | 23.7 °C |
| March | 5.22 | 4.75 | 3.95 | 4.85 | 21.3 °C |
| April | 3.85 | 4.75 | 4.02 | 4.18 | 17.7 °C |
| May | 2.71 | 4.08 | 3.50 | 3.29 | 14.0 °C |
| June | 2.24 | 3.81 | 3.30 | 2.94 | 10.9 °C |
| July | 2.37 | 3.76 | 3.28 | 3.00 | 9.9 °C |
| August | 3.23 | 4.29 | 3.71 | 3.70 | 11.6 °C |
| September | 4.42 | 4.49 | 3.85 | 4.43 | 13.6 °C |
| October | 5.54 | 4.19 | 3.54 | 4.85 | 16.8 °C |
| November | 6.80 | 3.83 | 3.18 | 5.29 | 20.1 °C |
| December | 7.48 | 3.60 | 2.95 | 5.45 | 22.9 °C |
| Year | 4.78 avg | 4.13 avg | 1273 kWh | 1596 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 400 Wp of panels at 70°, versus 400 Wp at 30°. The steep array is 0% smaller for the same winter. Size your own system.
Row spacing in Avellaneda
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.
4.1 mrow pitch at 70°
3.6 mrow pitch at 30°
How Avellaneda compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
240thof 314 places in Argentina for sunshine, shared: 4.78 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Argentina: 1,596 against 1,639 kWh per kWp.
±0 mindaylight on the longest day, compared with Buenos Aires: 14 h 29 min against 14 h 29 min.
30°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); Avellaneda ranks joint 240th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.95 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 9 h 50 min, ±0 min compared with Buenos Aires.
Solar forecast for Avellaneda, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Avellaneda
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Places near Avellaneda
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A free, live card for Avellaneda: 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.
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.