Santa Fe · Argentina · 33.00° S · 60.77° W
Solar position in Pérez
Sun position, daylight and the best solar panel angle for Pérez — computed for 33.00° S, 60.77° W, 37 m above sea level.
The sun right now
Sun in Pérez today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:44 | sun 18° below horizon |
| Nautical dawn | 05:15 | 12° below |
| Civil dawn | 05:46 | 6° below |
| Sunrise | 06:11 | 105° ESE |
| Golden hour ends | 06:45 | sun 6° up |
| Solar noon | 12:47 | 68.9° high |
| Golden hour starts | 18:49 | sun 6° up |
| Sunset | 19:23 | 255° WSW |
| Civil dusk | 19:48 | 6° below |
| Nautical dusk | 20:19 | 12° below |
| Astronomical dusk | 20:51 | 18° below |
| Day length | 13 h 11 min | |
Sun path diagram for Pérez
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 33.6° at solar noon in Pérez; on the December solstice only 80.4°. Sunrise swings from 62° ENE in June to 119° ESE in December — a 57° 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 | 06:15 | 13:14 | 20:12 | 13 h 57 min | 76.8° |
| February | 06:44 | 13:16 | 19:47 | 13 h 03 min | 67.4° |
| March | 07:07 | 13:09 | 19:12 | 12 h 06 min | 56.6° |
| April | 07:29 | 13:01 | 18:33 | 11 h 05 min | 45.0° |
| May | 07:50 | 12:59 | 18:08 | 10 h 18 min | 36.7° |
| June | 08:05 | 13:04 | 18:04 | 9 h 58 min | 33.6° |
| July | 08:01 | 13:09 | 18:18 | 10 h 17 min | 36.6° |
| August | 07:33 | 13:06 | 18:38 | 11 h 05 min | 45.1° |
| September | 06:53 | 12:56 | 18:58 | 12 h 05 min | 56.5° |
| October | 06:15 | 12:47 | 19:20 | 13 h 05 min | 67.9° |
| November | 05:50 | 12:49 | 19:48 | 13 h 58 min | 77.0° |
| December | 05:51 | 13:01 | 20:11 | 14 h 20 min | 80.4° |
A year of daylight in Pérez
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 Pérez
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
29°collects the most energy over a year: 1617 kWh per kWp.
59°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 | 89% | 1.96 | 3.0× |
| 15° | 1575 | 97% | 2.63 | 2.2× |
| 29° year-round best | 1617 | 100% | 3.11 | 1.7× |
| 30° | 1617 | 100% | 3.14 | 1.7× |
| 33° = latitude | 1614 | 100% | 3.22 | 1.6× |
| 45° | 1564 | 97% | 3.45 | 1.4× |
| 59° off-grid best | 1431 | 88% | 3.54 | 1.2× |
| 60° | 1419 | 88% | 3.54 | 1.3× |
| 70° | 1278 | 79% | 3.48 | 1.5× |
| 90° | 915 | 57% | 3.07 | 2.5× |
A fixed array in Pérez produces the most over a year at 29°. The design month for an off-grid system is June: at 59° it makes 3.54 kWh per kWp a day, 14% more than at 29°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Pérez at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 29° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 29° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.20 | 3.59 | 2.91 | 5.29 | 25.7 °C |
| February | 6.20 | 4.07 | 3.34 | 5.03 | 24.2 °C |
| March | 5.23 | 4.61 | 3.83 | 4.80 | 21.5 °C |
| April | 3.87 | 4.63 | 3.91 | 4.12 | 17.6 °C |
| May | 2.87 | 4.20 | 3.61 | 3.41 | 13.6 °C |
| June | 2.42 | 4.00 | 3.48 | 3.11 | 10.6 °C |
| July | 2.64 | 4.14 | 3.61 | 3.31 | 9.9 °C |
| August | 3.56 | 4.66 | 4.03 | 4.04 | 11.9 °C |
| September | 4.72 | 4.70 | 4.01 | 4.67 | 14.7 °C |
| October | 5.67 | 4.14 | 3.48 | 4.90 | 18.3 °C |
| November | 6.86 | 3.69 | 3.05 | 5.26 | 21.7 °C |
| December | 7.31 | 3.36 | 2.74 | 5.27 | 24.1 °C |
| Year | 4.87 avg | 4.15 avg | 1278 kWh | 1617 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 430 Wp of panels at 70°, versus 380 Wp at 29°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Pérez
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.
3.9 mrow pitch at 70°
3.4 mrow pitch at 29°
How Pérez compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
153rdof 314 places in Argentina for sunshine, shared: 4.87 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in Argentina: 1,617 against 1,639 kWh per kWp.
−9 mindaylight on the longest day, compared with Buenos Aires: 14 h 20 min against 14 h 29 min.
29°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); Pérez ranks joint 153rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.74 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 9 h 58 min, +8 min compared with Buenos Aires.
Solar forecast for Pérez, 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 Pérez
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Places near Pérez
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A free, live card for Pérez: 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.