Pará · Brazil · 2.42° S · 48.15° W
Solar position in Tomé-Açu
Sun position, daylight and the best solar panel angle for Tomé-Açu — computed for 2.42° S, 48.15° W, 21 m above sea level.
The sun right now
Sun in Tomé-Açu today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:41 | sun 18° below horizon |
| Nautical dawn | 05:05 | 12° below |
| Civil dawn | 05:30 | 6° below |
| Sunrise | 05:51 | 102° ESE |
| Golden hour ends | 06:19 | sun 6° up |
| Solar noon | 11:56 | 80.5° high |
| Golden hour starts | 17:34 | sun 6° up |
| Sunset | 18:02 | 258° WSW |
| Civil dusk | 18:23 | 6° below |
| Nautical dusk | 18:47 | 12° below |
| Astronomical dusk | 19:12 | 18° below |
| Day length | 12 h 11 min | |
Sun path diagram for Tomé-Açu
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 64.2° at solar noon in Tomé-Açu; on the December solstice only 69.0°. Sunrise swings from 67° ENE in June to 113° 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 | 06:16 | 12:23 | 18:31 | 12 h 14 min | 72.6° |
| February | 06:21 | 12:26 | 18:31 | 12 h 10 min | 82.0° |
| March | 06:16 | 12:19 | 18:22 | 12 h 06 min | 87.2° |
| April | 06:09 | 12:11 | 18:12 | 12 h 03 min | 75.6° |
| May | 06:09 | 12:09 | 18:09 | 12 h 00 min | 67.3° |
| June | 06:14 | 12:14 | 18:13 | 11 h 59 min | 64.2° |
| July | 06:19 | 12:19 | 18:19 | 12 h 00 min | 67.2° |
| August | 06:14 | 12:15 | 18:17 | 12 h 03 min | 75.6° |
| September | 06:02 | 12:05 | 18:08 | 12 h 06 min | 87.0° |
| October | 05:52 | 11:57 | 18:02 | 12 h 10 min | 81.6° |
| November | 05:51 | 11:58 | 18:05 | 12 h 14 min | 72.4° |
| December | 06:02 | 12:10 | 18:18 | 12 h 16 min | 69.0° |
A year of daylight in Tomé-Açu
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 Tomé-Açu
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
5°collects the most energy over a year: 1530 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 | February kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° off-grid best | 1524 | 100% | 3.82 | 1.2× |
| 2° = latitude | 1528 | 100% | 3.80 | 1.2× |
| 5° year-round best | 1530 | 100% | 3.76 | 1.2× |
| 15° | 1513 | 99% | 3.57 | 1.4× |
| 30° | 1418 | 93% | 3.15 | 1.7× |
| 45° | 1245 | 81% | 2.56 | 2.3× |
| 60° | 1013 | 66% | 1.86 | 3.3× |
| 70° | 850 | 56% | 1.38 | 3.5× |
| 90° | 571 | 37% | 1.05 | 2.8× |
A fixed array in Tomé-Açu produces the most over a year at 5°. The design month for an off-grid system is February: at 0° it makes 3.82 kWh per kWp a day, 2% more than at 5°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Tomé-Açu at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 5° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 5° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.94 | 1.46 | 1.14 | 3.81 | 26.1 °C |
| February | 4.80 | 1.75 | 1.38 | 3.76 | 25.5 °C |
| March | 4.97 | 2.42 | 1.95 | 3.95 | 25.6 °C |
| April | 4.98 | 3.22 | 2.62 | 4.02 | 25.6 °C |
| May | 5.13 | 4.08 | 3.33 | 4.21 | 25.8 °C |
| June | 5.34 | 4.79 | 3.92 | 4.42 | 25.7 °C |
| July | 5.54 | 4.79 | 3.92 | 4.58 | 25.7 °C |
| August | 5.77 | 4.11 | 3.35 | 4.70 | 26.3 °C |
| September | 5.80 | 3.02 | 2.43 | 4.62 | 27.6 °C |
| October | 5.57 | 2.01 | 1.59 | 4.33 | 28.8 °C |
| November | 5.27 | 1.46 | 1.13 | 4.04 | 28.9 °C |
| December | 5.01 | 1.43 | 1.12 | 3.83 | 27.5 °C |
| Year | 5.26 avg | 2.89 avg | 850 kWh | 1530 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 1,060 Wp of panels at 70°, versus 310 Wp at 5°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Tomé-Açu
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.
1.7 mrow pitch at 70°
2.1 mrow pitch at 5°
How Tomé-Açu compares in Brazil
Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.
1022ndof 2,264 places in Brazil for sunshine, shared: 5.26 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Brazil: 1,530 against 1,581 kWh per kWp.
−1 h 20 mindaylight on the longest day, compared with São Paulo: 12 h 16 min against 13 h 35 min.
5°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); Tomé-Açu ranks joint 1022nd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.12 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 59 min, +1 h 18 min compared with São Paulo.
Solar forecast for Tomé-Açu, 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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A free, live card for Tomé-Açu: 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.