Chubut · Argentina · 43.25° S · 65.31° W
Solar position in Trelew
Sun position, daylight and the best solar panel angle for Trelew — computed for 43.25° S, 65.31° W, 14 m above sea level.
The sun right now
Sun in Trelew today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:29 | sun 18° below horizon |
| Nautical dawn | 05:08 | 12° below |
| Civil dawn | 05:45 | 6° below |
| Sunrise | 06:15 | 107° ESE |
| Golden hour ends | 06:53 | sun 6° up |
| Solar noon | 13:05 | 58.7° high |
| Golden hour starts | 19:17 | sun 6° up |
| Sunset | 19:56 | 253° WSW |
| Civil dusk | 20:26 | 6° below |
| Nautical dusk | 21:03 | 12° below |
| Astronomical dusk | 21:42 | 18° below |
| Day length | 13 h 41 min | |
Sun path diagram for Trelew
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 23.3° at solar noon in Trelew; on the December solstice only 70.2°. Sunrise swings from 58° ENE in June to 124° SE in December — a 66° 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 | 06:07 | 13:32 | 20:56 | 14 h 49 min | 66.5° |
| February | 06:49 | 13:34 | 20:18 | 13 h 29 min | 57.1° |
| March | 07:25 | 13:28 | 19:30 | 12 h 06 min | 46.3° |
| April | 08:01 | 13:19 | 18:38 | 10 h 37 min | 34.8° |
| May | 08:33 | 13:17 | 18:01 | 9 h 28 min | 26.5° |
| June | 08:53 | 13:23 | 17:52 | 8 h 58 min | 23.3° |
| July | 08:44 | 13:27 | 18:11 | 9 h 27 min | 26.4° |
| August | 08:05 | 13:24 | 18:43 | 10 h 38 min | 34.8° |
| September | 07:12 | 13:14 | 19:17 | 12 h 05 min | 46.2° |
| October | 06:19 | 13:05 | 19:52 | 13 h 33 min | 57.6° |
| November | 05:42 | 13:07 | 20:32 | 14 h 51 min | 66.8° |
| December | 05:37 | 13:19 | 21:01 | 15 h 24 min | 70.2° |
A year of daylight in Trelew
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 Trelew
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
37°collects the most energy over a year: 1658 kWh per kWp.
67°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° | 1366 | 82% | 1.18 | 5.4× |
| 15° | 1554 | 94% | 1.79 | 3.6× |
| 30° | 1648 | 99% | 2.29 | 2.7× |
| 37° year-round best | 1658 | 100% | 2.48 | 2.4× |
| 43° = latitude | 1650 | 99% | 2.61 | 2.2× |
| 45° | 1643 | 99% | 2.64 | 2.1× |
| 60° | 1542 | 93% | 2.83 | 1.8× |
| 67° off-grid best | 1463 | 88% | 2.85 | 1.7× |
| 70° | 1424 | 86% | 2.85 | 1.6× |
| 90° | 1086 | 66% | 2.64 | 1.7× |
A fixed array in Trelew produces the most over a year at 37°. The design month for an off-grid system is June: at 67° it makes 2.85 kWh per kWp a day, 15% more than at 37°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Trelew at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 37° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 37° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.74 | 4.81 | 4.01 | 5.96 | 20.3 °C |
| February | 6.58 | 5.30 | 4.43 | 5.78 | 19.6 °C |
| March | 4.99 | 5.47 | 4.62 | 5.20 | 17.3 °C |
| April | 3.33 | 5.02 | 4.31 | 4.26 | 13.3 °C |
| May | 1.96 | 3.63 | 3.16 | 2.88 | 9.7 °C |
| June | 1.51 | 3.23 | 2.85 | 2.48 | 6.7 °C |
| July | 1.76 | 3.58 | 3.17 | 2.81 | 5.9 °C |
| August | 2.60 | 4.18 | 3.68 | 3.53 | 7.5 °C |
| September | 4.10 | 5.00 | 4.36 | 4.66 | 9.7 °C |
| October | 5.67 | 5.08 | 4.37 | 5.38 | 12.5 °C |
| November | 7.06 | 4.79 | 4.06 | 5.76 | 15.8 °C |
| December | 7.84 | 4.60 | 3.85 | 5.90 | 18.6 °C |
| Year | 4.58 avg | 4.55 avg | 1424 kWh | 1658 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 410 Wp of panels at 70°, versus 480 Wp at 37°. The steep array is 13% smaller for the same winter. Size your own system.
Row spacing in Trelew
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.
5.8 mrow pitch at 70°
4.9 mrow pitch at 37°
How Trelew compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
294thof 314 places in Argentina for sunshine, shared: 4.58 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Argentina: 1,658 against 1,639 kWh per kWp.
+55 mindaylight on the longest day, compared with Buenos Aires: 15 h 24 min against 14 h 29 min.
37°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); Trelew ranks joint 294th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.85 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 8 h 58 min, −52 min compared with Buenos Aires.
Solar forecast for Trelew, 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 Trelew
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Places near Trelew
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A free, live card for Trelew: 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.