Santa Fe · Argentina · 30.58° S · 59.93° W
Solar position in San Javier
Sun position, daylight and the best solar panel angle for San Javier — computed for 30.58° S, 59.93° W, 30 m above sea level.
The sun right now
Sun in San Javier today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:46 | sun 18° below horizon |
| Nautical dawn | 05:17 | 12° below |
| Civil dawn | 05:46 | 6° below |
| Sunrise | 06:11 | 104° ESE |
| Golden hour ends | 06:44 | sun 6° up |
| Solar noon | 12:43 | 71.3° high |
| Golden hour starts | 18:44 | sun 6° up |
| Sunset | 19:16 | 256° WSW |
| Civil dusk | 19:41 | 6° below |
| Nautical dusk | 20:11 | 12° below |
| Astronomical dusk | 20:41 | 18° below |
| Day length | 13 h 05 min | |
Sun path diagram for San Javier
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 36.0° at solar noon in San Javier; on the December solstice only 82.9°. 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 | 06:17 | 13:11 | 20:04 | 13 h 47 min | 79.2° |
| February | 06:44 | 13:13 | 19:41 | 12 h 58 min | 69.8° |
| March | 07:03 | 13:06 | 19:09 | 12 h 06 min | 59.0° |
| April | 07:23 | 12:58 | 18:33 | 11 h 10 min | 47.4° |
| May | 07:42 | 12:56 | 18:09 | 10 h 28 min | 39.2° |
| June | 07:56 | 13:01 | 18:06 | 10 h 10 min | 36.0° |
| July | 07:52 | 13:06 | 18:19 | 10 h 27 min | 39.1° |
| August | 07:27 | 13:03 | 18:38 | 11 h 10 min | 47.5° |
| September | 06:50 | 12:52 | 18:55 | 12 h 05 min | 58.9° |
| October | 06:14 | 12:44 | 19:14 | 13 h 00 min | 70.3° |
| November | 05:51 | 12:45 | 19:39 | 13 h 48 min | 79.4° |
| December | 05:53 | 12:57 | 20:01 | 14 h 08 min | 82.9° |
A year of daylight in San Javier
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 San Javier
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: 1603 kWh per kWp.
55°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° | 1448 | 90% | 2.07 | 2.7× |
| 15° | 1572 | 98% | 2.72 | 2.0× |
| 27° year-round best | 1603 | 100% | 3.11 | 1.7× |
| 30° | 1601 | 100% | 3.19 | 1.6× |
| 31° = latitude | 1600 | 100% | 3.21 | 1.6× |
| 45° | 1536 | 96% | 3.46 | 1.3× |
| 55° off-grid best | 1442 | 90% | 3.52 | 1.2× |
| 60° | 1381 | 86% | 3.52 | 1.3× |
| 70° | 1235 | 77% | 3.43 | 1.6× |
| 90° | 870 | 54% | 2.98 | 2.9× |
A fixed array in San Javier produces the most over a year at 27°. The design month for an off-grid system is June: at 55° it makes 3.52 kWh per kWp a day, 13% more than at 27°, and costs 10% of the yearly total. Why steep panels win winter.
Off-grid solar in San Javier 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 | 3.28 | 2.64 | 5.12 | 27.1 °C |
| February | 6.16 | 3.83 | 3.12 | 4.92 | 25.7 °C |
| March | 5.27 | 4.42 | 3.65 | 4.71 | 23.2 °C |
| April | 4.01 | 4.57 | 3.84 | 4.11 | 19.4 °C |
| May | 3.00 | 4.15 | 3.54 | 3.40 | 15.4 °C |
| June | 2.57 | 3.98 | 3.43 | 3.11 | 12.6 °C |
| July | 2.91 | 4.41 | 3.81 | 3.50 | 11.9 °C |
| August | 3.79 | 4.78 | 4.10 | 4.16 | 13.9 °C |
| September | 4.79 | 4.56 | 3.86 | 4.61 | 16.6 °C |
| October | 5.67 | 3.94 | 3.28 | 4.80 | 20.2 °C |
| November | 6.86 | 3.43 | 2.81 | 5.19 | 23.0 °C |
| December | 7.12 | 3.08 | 2.49 | 5.11 | 25.4 °C |
| Year | 4.93 avg | 4.04 avg | 1235 kWh | 1603 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 380 Wp at 27°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in San Javier
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 San Javier compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
122ndof 314 places in Argentina for sunshine, shared: 4.93 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Argentina: 1,603 against 1,639 kWh per kWp.
−21 mindaylight on the longest day, compared with Buenos Aires: 14 h 08 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); San Javier ranks joint 122nd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.49 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 10 h 10 min, +20 min compared with Buenos Aires.
Solar forecast for San Javier, 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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A free, live card for San Javier: 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.