Pará · Brazil · 7.31° S · 50.05° W
Solar position in Rio Maria
Sun position, daylight and the best solar panel angle for Rio Maria — computed for 7.31° S, 50.05° W, 197 m above sea level.
The sun right now
Sun in Rio Maria today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:43 | sun 18° below horizon |
| Nautical dawn | 05:08 | 12° below |
| Civil dawn | 05:33 | 6° below |
| Sunrise | 05:54 | 102° ESE |
| Golden hour ends | 06:22 | sun 6° up |
| Solar noon | 12:04 | 85.4° high |
| Golden hour starts | 17:45 | sun 6° up |
| Sunset | 18:14 | 258° WSW |
| Civil dusk | 18:35 | 6° below |
| Nautical dusk | 19:00 | 12° below |
| Astronomical dusk | 19:25 | 18° below |
| Day length | 12 h 19 min | |
Sun path diagram for Rio Maria
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 59.3° at solar noon in Rio Maria; on the December solstice only 73.9°. 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 | 06:17 | 12:31 | 18:45 | 12 h 28 min | 77.5° |
| February | 06:24 | 12:33 | 18:42 | 12 h 18 min | 86.9° |
| March | 06:24 | 12:27 | 18:30 | 12 h 06 min | 82.3° |
| April | 06:21 | 12:18 | 18:15 | 11 h 54 min | 70.7° |
| May | 06:24 | 12:16 | 18:09 | 11 h 45 min | 62.4° |
| June | 06:31 | 12:22 | 18:12 | 11 h 42 min | 59.3° |
| July | 06:34 | 12:26 | 18:19 | 11 h 45 min | 62.3° |
| August | 06:26 | 12:23 | 18:20 | 11 h 54 min | 70.7° |
| September | 06:10 | 12:13 | 18:16 | 12 h 06 min | 82.2° |
| October | 05:55 | 12:04 | 18:13 | 12 h 18 min | 86.5° |
| November | 05:51 | 12:06 | 18:20 | 12 h 29 min | 77.3° |
| December | 06:01 | 12:18 | 18:34 | 12 h 33 min | 73.9° |
A year of daylight in Rio Maria
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 Rio Maria
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
12°collects the most energy over a year: 1516 kWh per kWp.
0°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° off-grid best | 1487 | 98% | 3.78 | 1.3× |
| 7° = latitude | 1511 | 100% | 3.64 | 1.4× |
| 12° year-round best | 1516 | 100% | 3.52 | 1.4× |
| 15° | 1515 | 100% | 3.44 | 1.5× |
| 30° | 1459 | 96% | 2.93 | 1.9× |
| 45° | 1323 | 87% | 2.27 | 2.4× |
| 60° | 1118 | 74% | 1.57 | 3.2× |
| 70° | 957 | 63% | 1.19 | 3.9× |
| 90° | 657 | 43% | 1.05 | 3.2× |
A fixed array in Rio Maria produces the most over a year at 12°. The design month for an off-grid system is December: at 0° it makes 3.78 kWh per kWp a day, 7% more than at 12°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Rio Maria at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 12° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 12° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.87 | 1.63 | 1.29 | 3.65 | 25.1 °C |
| February | 4.84 | 2.02 | 1.62 | 3.73 | 24.8 °C |
| March | 4.82 | 2.65 | 2.15 | 3.83 | 24.9 °C |
| April | 4.87 | 3.43 | 2.81 | 4.03 | 25.0 °C |
| May | 4.97 | 4.36 | 3.58 | 4.29 | 24.9 °C |
| June | 5.37 | 5.46 | 4.49 | 4.79 | 24.3 °C |
| July | 5.70 | 5.62 | 4.61 | 5.05 | 25.5 °C |
| August | 5.98 | 4.77 | 3.87 | 5.04 | 27.9 °C |
| September | 5.65 | 3.32 | 2.66 | 4.49 | 29.6 °C |
| October | 5.01 | 2.26 | 1.79 | 3.84 | 28.8 °C |
| November | 4.76 | 1.69 | 1.33 | 3.56 | 27.2 °C |
| December | 4.76 | 1.52 | 1.19 | 3.52 | 25.9 °C |
| Year | 5.13 avg | 3.24 avg | 957 kWh | 1516 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 990 Wp of panels at 70°, versus 330 Wp at 12°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Rio Maria
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.
1.9 mrow pitch at 70°
2.2 mrow pitch at 12°
How Rio Maria compares in Brazil
Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.
1293rdof 2,264 places in Brazil for sunshine, shared: 5.13 peak sun hours a day on flat ground.
−4%solar energy a year compared with the average place in Brazil: 1,516 against 1,581 kWh per kWp.
−1 h 02 mindaylight on the longest day, compared with São Paulo: 12 h 33 min against 13 h 35 min.
12°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); Rio Maria ranks joint 1293rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.19 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 42 min, +1 h 01 min compared with São Paulo.
Solar forecast for Rio Maria, 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 Rio Maria
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A free, live card for Rio Maria: 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.