Pará · Brazil · 3.20° S · 52.21° W
Solar position in Altamira
Sun position, daylight and the best solar panel angle for Altamira — computed for 3.20° S, 52.21° W, 101 m above sea level.
The sun right now
Sun in Altamira today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:56 | sun 18° below horizon |
| Nautical dawn | 05:21 | 12° below |
| Civil dawn | 05:45 | 6° below |
| Sunrise | 06:06 | 102° ESE |
| Golden hour ends | 06:34 | sun 6° up |
| Solar noon | 12:12 | 81.3° high |
| Golden hour starts | 17:51 | sun 6° up |
| Sunset | 18:19 | 258° WSW |
| Civil dusk | 18:40 | 6° below |
| Nautical dusk | 19:04 | 12° below |
| Astronomical dusk | 19:29 | 18° below |
| Day length | 12 h 12 min | |
Sun path diagram for Altamira
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 63.4° at solar noon in Altamira; on the December solstice only 69.8°. Sunrise swings from 67° 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 | 06:31 | 12:40 | 18:48 | 12 h 16 min | 73.4° |
| February | 06:36 | 12:42 | 18:48 | 12 h 11 min | 82.8° |
| March | 06:32 | 12:35 | 18:39 | 12 h 06 min | 86.4° |
| April | 06:26 | 12:27 | 18:28 | 12 h 01 min | 74.8° |
| May | 06:26 | 12:25 | 18:24 | 11 h 58 min | 66.5° |
| June | 06:32 | 12:30 | 18:28 | 11 h 56 min | 63.4° |
| July | 06:36 | 12:35 | 18:34 | 11 h 58 min | 66.4° |
| August | 06:31 | 12:32 | 18:32 | 12 h 01 min | 74.8° |
| September | 06:18 | 12:21 | 18:24 | 12 h 06 min | 86.3° |
| October | 06:07 | 12:13 | 18:19 | 12 h 12 min | 82.4° |
| November | 06:06 | 12:14 | 18:23 | 12 h 17 min | 73.2° |
| December | 06:17 | 12:26 | 18:36 | 12 h 19 min | 69.8° |
A year of daylight in Altamira
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 Altamira
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
7°collects the most energy over a year: 1425 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 | 1417 | 99% | 3.58 | 1.2× |
| 3° = latitude | 1422 | 100% | 3.52 | 1.3× |
| 7° year-round best | 1425 | 100% | 3.44 | 1.3× |
| 15° | 1413 | 99% | 3.22 | 1.4× |
| 30° | 1333 | 94% | 2.70 | 1.7× |
| 45° | 1183 | 83% | 2.06 | 2.2× |
| 60° | 975 | 68% | 1.40 | 3.0× |
| 70° | 825 | 58% | 1.17 | 3.2× |
| 90° | 562 | 39% | 1.03 | 2.5× |
A fixed array in Altamira produces the most over a year at 7°. The design month for an off-grid system is December: at 0° it makes 3.58 kWh per kWp a day, 4% more than at 7°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Altamira at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 7° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 7° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.56 | 1.49 | 1.16 | 3.49 | 25.7 °C |
| February | 4.48 | 1.76 | 1.40 | 3.50 | 25.0 °C |
| March | 4.61 | 2.36 | 1.90 | 3.67 | 25.0 °C |
| April | 4.58 | 3.01 | 2.45 | 3.71 | 25.1 °C |
| May | 4.64 | 3.69 | 3.01 | 3.83 | 25.3 °C |
| June | 4.96 | 4.45 | 3.65 | 4.16 | 25.2 °C |
| July | 5.25 | 4.57 | 3.75 | 4.40 | 25.4 °C |
| August | 5.58 | 4.03 | 3.28 | 4.57 | 26.6 °C |
| September | 5.55 | 3.01 | 2.42 | 4.41 | 28.2 °C |
| October | 5.18 | 2.08 | 1.64 | 4.01 | 28.9 °C |
| November | 4.78 | 1.59 | 1.24 | 3.63 | 28.7 °C |
| December | 4.54 | 1.50 | 1.17 | 3.44 | 27.3 °C |
| Year | 4.90 avg | 2.80 avg | 825 kWh | 1425 kWh |
Sizing example. To run a 1 kWh-per-day load through January on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 1,010 Wp of panels at 70°, versus 340 Wp at 7°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Altamira
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.
1.8 mrow pitch at 70°
2.1 mrow pitch at 7°
How Altamira compares in Brazil
Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.
1645thof 2,264 places in Brazil for sunshine, shared: 4.89 peak sun hours a day on flat ground.
−10%solar energy a year compared with the average place in Brazil: 1,425 against 1,581 kWh per kWp.
−1 h 17 mindaylight on the longest day, compared with São Paulo: 12 h 19 min against 13 h 35 min.
7°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); Altamira ranks joint 1645th. In its darkest month, January, 1 kWp of off-grid panels at 70° makes 1.17 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 11 h 56 min, +1 h 15 min compared with São Paulo.
Solar forecast for Altamira, 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 Altamira
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A free, live card for Altamira: 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.