Entre Rios · Argentina · 30.96° S · 58.78° W
Solar position in Federal
Sun position, daylight and the best solar panel angle for Federal — computed for 30.96° S, 58.78° W, 71 m above sea level.
The sun right now
Sun in Federal today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:41 | sun 18° below horizon |
| Nautical dawn | 05:11 | 12° below |
| Civil dawn | 05:41 | 6° below |
| Sunrise | 06:06 | 104° ESE |
| Golden hour ends | 06:39 | sun 6° up |
| Solar noon | 12:39 | 71.0° high |
| Golden hour starts | 18:39 | sun 6° up |
| Sunset | 19:12 | 255° WSW |
| Civil dusk | 19:37 | 6° below |
| Nautical dusk | 20:07 | 12° below |
| Astronomical dusk | 20:38 | 18° below |
| Day length | 13 h 06 min | |
Sun path diagram for Federal
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 35.6° at solar noon in Federal; on the December solstice only 82.5°. Sunrise swings from 63° ENE in June to 118° ESE in December — a 55° 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 | 06:12 | 13:06 | 20:00 | 13 h 48 min | 78.8° |
| February | 06:39 | 13:08 | 19:37 | 12 h 58 min | 69.4° |
| March | 06:59 | 13:02 | 19:04 | 12 h 06 min | 58.6° |
| April | 07:18 | 12:53 | 18:28 | 11 h 09 min | 47.0° |
| May | 07:38 | 12:51 | 18:04 | 10 h 26 min | 38.8° |
| June | 07:52 | 12:56 | 18:01 | 10 h 08 min | 35.6° |
| July | 07:48 | 13:01 | 18:14 | 10 h 26 min | 38.7° |
| August | 07:23 | 12:58 | 18:33 | 11 h 10 min | 47.1° |
| September | 06:45 | 12:48 | 18:50 | 12 h 05 min | 58.5° |
| October | 06:09 | 12:39 | 19:10 | 13 h 01 min | 69.9° |
| November | 05:46 | 12:41 | 19:35 | 13 h 50 min | 79.1° |
| December | 05:48 | 12:53 | 19:58 | 14 h 10 min | 82.5° |
A year of daylight in Federal
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 Federal
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
27°collects the most energy over a year: 1595 kWh per kWp.
56°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° | 1439 | 90% | 2.03 | 2.8× |
| 15° | 1563 | 98% | 2.66 | 2.1× |
| 27° year-round best | 1595 | 100% | 3.05 | 1.7× |
| 30° | 1593 | 100% | 3.13 | 1.6× |
| 31° = latitude | 1592 | 100% | 3.15 | 1.6× |
| 45° | 1530 | 96% | 3.40 | 1.3× |
| 56° off-grid best | 1426 | 89% | 3.47 | 1.2× |
| 60° | 1377 | 86% | 3.46 | 1.3× |
| 70° | 1231 | 77% | 3.38 | 1.6× |
| 90° | 868 | 54% | 2.94 | 2.7× |
A fixed array in Federal produces the most over a year at 27°. The design month for an off-grid system is June: at 56° it makes 3.47 kWh per kWp a day, 14% more than at 27°, and costs 11% of the yearly total. Why steep panels win winter.
Off-grid solar in Federal at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 27° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 27° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.02 | 3.32 | 2.68 | 5.14 | 26.7 °C |
| February | 6.17 | 3.87 | 3.15 | 4.94 | 25.4 °C |
| March | 5.30 | 4.48 | 3.71 | 4.76 | 22.8 °C |
| April | 4.03 | 4.65 | 3.91 | 4.16 | 19.2 °C |
| May | 2.96 | 4.14 | 3.54 | 3.38 | 15.0 °C |
| June | 2.51 | 3.92 | 3.38 | 3.05 | 12.3 °C |
| July | 2.82 | 4.29 | 3.71 | 3.40 | 11.6 °C |
| August | 3.65 | 4.61 | 3.96 | 4.01 | 13.4 °C |
| September | 4.65 | 4.45 | 3.79 | 4.50 | 15.7 °C |
| October | 5.60 | 3.92 | 3.28 | 4.77 | 19.2 °C |
| November | 6.85 | 3.45 | 2.84 | 5.22 | 22.1 °C |
| December | 7.14 | 3.11 | 2.52 | 5.14 | 24.9 °C |
| Year | 4.89 avg | 4.02 avg | 1231 kWh | 1595 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 470 Wp of panels at 70°, versus 390 Wp at 27°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Federal
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.
3.6 mrow pitch at 70°
3.2 mrow pitch at 27°
How Federal compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
141stof 314 places in Argentina for sunshine, shared: 4.89 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Argentina: 1,595 against 1,639 kWh per kWp.
−19 mindaylight on the longest day, compared with Buenos Aires: 14 h 10 min against 14 h 29 min.
27°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); Federal ranks joint 141st. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.52 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 10 h 08 min, +18 min compared with Buenos Aires.
Solar forecast for Federal, 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 Federal
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Places near Federal
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A free, live card for Federal: 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.