Piauí · Brazil · 8.14° S · 41.15° W
Solar position in Paulistana
Sun position, daylight and the best solar panel angle for Paulistana — computed for 8.14° S, 41.15° W, 357 m above sea level.
The sun right now
Sun in Paulistana today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:07 | sun 18° below horizon |
| Nautical dawn | 04:32 | 12° below |
| Civil dawn | 04:57 | 6° below |
| Sunrise | 05:18 | 102° ESE |
| Golden hour ends | 05:46 | sun 6° up |
| Solar noon | 11:28 | 86.3° high |
| Golden hour starts | 17:10 | sun 6° up |
| Sunset | 17:39 | 258° WSW |
| Civil dusk | 18:00 | 6° below |
| Nautical dusk | 18:25 | 12° below |
| Astronomical dusk | 18:50 | 18° below |
| Day length | 12 h 21 min | |
Sun path diagram for Paulistana
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 58.4° at solar noon in Paulistana; on the December solstice only 74.7°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 47° 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 | 05:40 | 11:55 | 18:11 | 12 h 31 min | 78.3° |
| February | 05:48 | 11:58 | 18:07 | 12 h 19 min | 87.7° |
| March | 05:48 | 11:51 | 17:54 | 12 h 06 min | 81.5° |
| April | 05:46 | 11:43 | 17:39 | 11 h 53 min | 69.9° |
| May | 05:49 | 11:41 | 17:32 | 11 h 43 min | 61.6° |
| June | 05:56 | 11:46 | 17:35 | 11 h 39 min | 58.4° |
| July | 05:59 | 11:51 | 17:42 | 11 h 43 min | 61.5° |
| August | 05:51 | 11:47 | 17:44 | 11 h 53 min | 69.9° |
| September | 05:34 | 11:37 | 17:40 | 12 h 06 min | 81.3° |
| October | 05:19 | 11:29 | 17:38 | 12 h 19 min | 87.3° |
| November | 05:14 | 11:30 | 17:46 | 12 h 31 min | 78.1° |
| December | 05:24 | 11:42 | 18:00 | 12 h 36 min | 74.7° |
A year of daylight in Paulistana
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 Paulistana
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
10°collects the most energy over a year: 1724 kWh per kWp.
10°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 | May kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1703 | 99% | 4.05 | 1.4× |
| 8° = latitude | 1723 | 100% | 4.31 | 1.3× |
| 10° year-round best off-grid best | 1724 | 100% | 4.37 | 1.3× |
| 15° | 1717 | 100% | 4.48 | 1.3× |
| 30° | 1631 | 95% | 4.65 | 1.6× |
| 45° | 1451 | 84% | 4.54 | 2.1× |
| 60° | 1193 | 69% | 4.16 | 3.0× |
| 70° | 995 | 58% | 3.77 | 4.1× |
| 90° | 657 | 38% | 2.70 | 3.7× |
A fixed array in Paulistana produces the most over a year at 10°. The design month for an off-grid system is May: at 10° it makes 4.37 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Paulistana at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 10° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 10° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.85 | 1.56 | 1.21 | 4.37 | 27.6 °C |
| February | 5.70 | 2.12 | 1.69 | 4.40 | 26.5 °C |
| March | 5.69 | 3.00 | 2.42 | 4.53 | 26.6 °C |
| April | 5.46 | 3.93 | 3.20 | 4.50 | 26.7 °C |
| May | 5.13 | 4.63 | 3.77 | 4.37 | 27.1 °C |
| June | 5.08 | 5.21 | 4.26 | 4.43 | 26.2 °C |
| July | 5.40 | 5.36 | 4.39 | 4.71 | 25.8 °C |
| August | 6.29 | 5.18 | 4.23 | 5.32 | 26.5 °C |
| September | 6.89 | 3.98 | 3.22 | 5.54 | 28.1 °C |
| October | 6.86 | 2.49 | 1.98 | 5.26 | 29.6 °C |
| November | 6.44 | 1.56 | 1.21 | 4.77 | 29.7 °C |
| December | 6.08 | 1.39 | 1.07 | 4.46 | 28.7 °C |
| Year | 5.91 avg | 3.37 avg | 995 kWh | 1724 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 1,100 Wp of panels at 70°, versus 270 Wp at 10°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Paulistana
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.
2.0 mrow pitch at 70°
2.2 mrow pitch at 10°
How Paulistana compares in Brazil
Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.
110thof 2,264 places in Brazil for sunshine, shared: 5.91 peak sun hours a day on flat ground.
+9%solar energy a year compared with the average place in Brazil: 1,724 against 1,581 kWh per kWp.
−59 mindaylight on the longest day, compared with São Paulo: 12 h 36 min against 13 h 35 min.
10°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); Paulistana ranks joint 110th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.07 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 39 min, +58 min compared with São Paulo.
Solar forecast for Paulistana, 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 Paulistana
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Places near Paulistana
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A free, live card for Paulistana: 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.