San Martín Department · Peru · 6.06° S · 77.17° W
Solar position in Rioja
Sun position, daylight and the best solar panel angle for Rioja — computed for 6.06° S, 77.17° W, 831 m above sea level.
The sun right now
Sun in Rioja today
Saturday, 24 October 2026 · local time UTC−5
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:33 | sun 18° below horizon |
| Nautical dawn | 04:58 | 12° below |
| Civil dawn | 05:23 | 6° below |
| Sunrise | 05:44 | 102° ESE |
| Golden hour ends | 06:12 | sun 6° up |
| Solar noon | 11:52 | 84.1° high |
| Golden hour starts | 17:33 | sun 6° up |
| Sunset | 18:01 | 258° WSW |
| Civil dusk | 18:22 | 6° below |
| Nautical dusk | 18:47 | 12° below |
| Astronomical dusk | 19:12 | 18° below |
| Day length | 12 h 17 min | |
Sun path diagram for Rioja
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 60.5° at solar noon in Rioja; on the December solstice only 72.6°. 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 | 06:07 | 12:20 | 18:32 | 12 h 25 min | 76.3° |
| February | 06:14 | 12:22 | 18:29 | 12 h 16 min | 85.7° |
| March | 06:12 | 12:15 | 18:18 | 12 h 06 min | 83.5° |
| April | 06:09 | 12:07 | 18:05 | 11 h 56 min | 71.9° |
| May | 06:10 | 12:05 | 17:59 | 11 h 49 min | 63.7° |
| June | 06:17 | 12:10 | 18:03 | 11 h 46 min | 60.5° |
| July | 06:20 | 12:15 | 18:09 | 11 h 49 min | 63.6° |
| August | 06:13 | 12:11 | 18:10 | 11 h 56 min | 72.0° |
| September | 05:58 | 12:01 | 18:04 | 12 h 06 min | 83.4° |
| October | 05:45 | 11:53 | 18:01 | 12 h 16 min | 85.2° |
| November | 05:42 | 11:54 | 18:07 | 12 h 25 min | 76.0° |
| December | 05:52 | 12:06 | 18:21 | 12 h 29 min | 72.6° |
A year of daylight in Rioja
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 Rioja
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
8°collects the most energy over a year: 1245 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 | 1237 | 99% | 3.10 | 1.2× |
| 6° = latitude | 1245 | 100% | 3.06 | 1.2× |
| 8° year-round best | 1245 | 100% | 3.04 | 1.2× |
| 15° | 1237 | 99% | 2.95 | 1.3× |
| 30° | 1173 | 94% | 2.67 | 1.4× |
| 45° | 1048 | 84% | 2.26 | 1.8× |
| 60° | 875 | 70% | 1.76 | 2.3× |
| 70° | 745 | 60% | 1.40 | 2.6× |
| 90° | 519 | 42% | 1.00 | 2.2× |
A fixed array in Rioja produces the most over a year at 8°. The design month for an off-grid system is February: at 0° it makes 3.10 kWh per kWp a day, 2% more than at 8°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Rioja at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 8° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 8° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.13 | 1.47 | 1.18 | 3.22 | 19.9 °C |
| February | 3.82 | 1.72 | 1.40 | 3.04 | 19.8 °C |
| March | 3.86 | 2.16 | 1.78 | 3.13 | 19.5 °C |
| April | 4.04 | 2.79 | 2.32 | 3.36 | 19.3 °C |
| May | 4.00 | 3.30 | 2.76 | 3.40 | 19.2 °C |
| June | 3.96 | 3.61 | 3.03 | 3.42 | 18.6 °C |
| July | 4.06 | 3.59 | 3.01 | 3.50 | 18.8 °C |
| August | 4.40 | 3.32 | 2.77 | 3.71 | 19.9 °C |
| September | 4.45 | 2.61 | 2.15 | 3.65 | 20.5 °C |
| October | 4.57 | 2.02 | 1.64 | 3.66 | 20.6 °C |
| November | 4.56 | 1.56 | 1.26 | 3.57 | 20.5 °C |
| December | 4.20 | 1.43 | 1.14 | 3.26 | 20.0 °C |
| Year | 4.17 avg | 2.47 avg | 745 kWh | 1245 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 1,030 Wp of panels at 70°, versus 390 Wp at 8°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Rioja
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 8°
How Rioja compares in Peru
Against the other 135 places in Peru with climate data, for a fixed array at its best angle.
134thof 136 places in Peru for sunshine, shared: 4.17 peak sun hours a day on flat ground.
−22%solar energy a year compared with the average place in Peru: 1,245 against 1,605 kWh per kWp.
−22 mindaylight on the longest day, compared with Lima: 12 h 29 min against 12 h 50 min.
8°best year-round tilt here; across Peru it runs from 3° in Tumbes to 19° in Arequipa.
Of the 136 places in Peru, Ciudad Satelite and one other place get the most sun (6.60 peak sun hours a day) and La Peca the least (4.16); Rioja ranks joint 134th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.15 kWh a day here, against 1.33 kWh on average in Peru. The shortest day lasts 11 h 46 min, +21 min compared with Lima.
Solar forecast for Rioja, 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 Rioja
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Places near Rioja
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A free, live card for Rioja: 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.