Solarposition.org

Goiás · Brazil · 17.81° S · 50.60° W

Solar position in Santa Helena de Goiás

Sun position, daylight and the best solar panel angle for Santa Helena de Goiás — computed for 17.81° S, 50.60° W, 566 m above sea level.

Sunrise today05:47103° ESE
Sunset today18:25257° WSW
Best panel angle21°year-round, facing north
Off-grid angle14°best for the darkest month

The sun right now

Azimuth180.0°
Elevation84.1°
At solar noon, 12:06Open on the sun map

Sun in Santa Helena de Goiás today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn04:32sun 18° below horizon
Nautical dawn04:5912° below
Civil dawn05:256° below
Sunrise05:47103° ESE
Golden hour ends06:16sun 6° up
Solar noon12:0684.1° high
Golden hour starts17:56sun 6° up
Sunset18:25257° WSW
Civil dusk18:486° below
Nautical dusk19:1412° below
Astronomical dusk19:4018° below
Day length12 h 38 min

Sun path diagram for Santa Helena de Goiás

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice7891011121314151617EquinoxDecember solstice6789101112131415161718Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 48.8° at solar noon in Santa Helena de Goiás; on the December solstice only 84.4°. Sunrise swings from 66° ENE in June to 115° ESE in December — a 49° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:0312:3319:0413 h 01 min88.0°
February06:1812:3518:5212 h 34 min82.6°
March06:2612:2918:3212 h 06 min71.8°
April06:3312:2018:0811 h 36 min60.2°
May06:4212:1817:5511 h 13 min51.9°
June06:5212:2417:5611 h 04 min48.8°
July06:5212:2818:0511 h 13 min51.8°
August06:3712:2518:1311 h 36 min60.2°
September06:1212:1518:1812 h 05 min71.7°
October05:4912:0718:2412 h 35 min83.0°
November05:3712:0818:3913 h 01 min87.8°
December05:4412:2018:5613 h 12 min84.4°

A year of daylight in Santa Helena de Goiás

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Santa Helena de Goiás

Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

21°collects the most energy over a year: 1684 kWh per kWp.

14°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 21°Best worst-month 14°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°158994%4.691.3×
14° off-grid best167399%4.401.1×
15°1676100%4.371.1×
18° = latitude1682100%4.281.2×
21° year-round best1684100%4.181.2×
30°166699%3.821.4×
45°155893%3.081.7×
60°136381%2.222.4×
70°119271%1.653.0×
90°82549%1.113.6×

A fixed array in Santa Helena de Goiás produces the most over a year at 21°. The design month for an off-grid system is December: at 14° it makes 4.40 kWh per kWp a day, 5% more than at 21°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Santa Helena de Goiás at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 21° (year-round best).

0123456January: 1.77 (70°)1.8JanFebruary: 2.29 (70°)2.3FebMarch: 2.97 (70°)3.0MarApril: 3.88 (70°)3.9AprMay: 4.48 (70°)4.5MayJune: 4.81 (70°)4.8JunJuly: 4.94 (70°)4.9JulAugust: 4.57 (70°)4.6AugSeptember: 3.42 (70°)3.4SepOctober: 2.48 (70°)2.5OctNovember: 1.88 (70°)1.9NovDecember: 1.65 (70°)1.6Dec21°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 21°Mean temp.
January5.842.211.774.2424.5 °C
February5.892.822.294.5124.4 °C
March5.623.622.974.6124.2 °C
April5.324.713.884.8023.6 °C
May4.775.384.484.7021.6 °C
June4.525.774.814.6721.4 °C
July4.825.954.944.9121.8 °C
August5.505.554.575.1824.2 °C
September5.734.213.424.8427.0 °C
October5.773.082.484.4727.3 °C
November5.792.351.884.2525.5 °C
December5.862.061.654.1824.8 °C
Year5.45 avg3.98 avg1192 kWh1684 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 720 Wp of panels at 70°, versus 280 Wp at 21°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Santa Helena de Goiás

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.

2.5 mrow pitch at 70°

2.6 mrow pitch at 21°

Row spacing calculator

How Santa Helena de Goiás compares in Brazil

Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.

746thof 2,264 places in Brazil for sunshine, shared: 5.45 peak sun hours a day on flat ground.

+7%solar energy a year compared with the average place in Brazil: 1,684 against 1,581 kWh per kWp.

−23 mindaylight on the longest day, compared with São Paulo: 13 h 12 min against 13 h 35 min.

21°best year-round tilt here; across Brazil it runs from 0° in Macapá to 28° in Santa Vitória do Palmar.

Of the 2,264 places in Brazil, Catolé do Rocha gets the most sun (6.16 peak sun hours a day) and Paranaguá the least (4.01); Santa Helena de Goiás ranks joint 746th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.65 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 04 min, +23 min compared with São Paulo.

The sunniest places in Brazil

Solar forecast for Santa Helena de Goiás, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Santa Helena de Goiás

What is the best solar panel angle in Santa Helena de Goiás?
For a fixed array facing north, the best year-round tilt in Santa Helena de Goiás is 21°, worth about 1684 kWh per kWp a year. An off-grid system that has to get through December does better at about 14°.
What time is sunrise and sunset in Santa Helena de Goiás today?
On 24 October 2026 the sun rises at 05:47 and sets at 18:25 local time (UTC−3), giving 12 h 38 min of daylight. Solar noon is at 12:06.
How many peak sun hours does Santa Helena de Goiás get?
On a flat surface 5.4 hours a day averaged over the year, from 4.5 in June to 5.9 in February. Panels tilted at 70° receive 2.1 sun hours a day in December.
How high does the sun get in Santa Helena de Goiás?
At solar noon the sun stands 48.8° above the horizon on the June solstice and 84.4° on the December solstice.
Is Santa Helena de Goiás a good place for solar panels?
With 5.4 peak sun hours a day on flat ground, Santa Helena de Goiás ranks joint 746th of 2,264 places in Brazil for sunshine. A 1 kWp array at the best angle (21°) makes about 1,684 kWh a year here, 7% more than the average place in Brazil.

Places near Santa Helena de Goiás

All places in Brazil

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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.