Assaba · Mauritania · 17.08° N · 12.04° W
Solar position in Guerou
Sun position, daylight and the best solar panel angle for Guerou — computed for 17.08° N, 12.04° W, 183 m above sea level.
The sun right now
Sun in Guerou today
Saturday, 24 October 2026 · local time UTC
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:30 | sun 18° below horizon |
| Nautical dawn | 05:55 | 12° below |
| Civil dawn | 06:21 | 6° below |
| Sunrise | 06:43 | 102° ESE |
| Golden hour ends | 07:12 | sun 6° up |
| Solar noon | 12:32 | 61.1° high |
| Golden hour starts | 17:51 | sun 6° up |
| Sunset | 18:20 | 258° WSW |
| Civil dusk | 18:43 | 6° below |
| Nautical dusk | 19:08 | 12° below |
| Astronomical dusk | 19:33 | 18° below |
| Day length | 11 h 37 min | |
Sun path diagram for Guerou
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 83.6° at solar noon in Guerou; on the December solstice only 49.5°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 49° 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 | 07:21 | 12:59 | 18:37 | 11 h 17 min | 53.1° |
| February | 07:11 | 13:01 | 18:52 | 11 h 41 min | 62.5° |
| March | 06:51 | 12:55 | 18:59 | 12 h 08 min | 73.3° |
| April | 06:28 | 12:46 | 19:05 | 12 h 37 min | 84.9° |
| May | 06:15 | 12:44 | 19:14 | 13 h 00 min | 86.8° |
| June | 06:15 | 12:49 | 19:24 | 13 h 09 min | 83.6° |
| July | 06:24 | 12:54 | 19:24 | 13 h 00 min | 86.7° |
| August | 06:32 | 12:51 | 19:09 | 12 h 37 min | 84.9° |
| September | 06:37 | 12:41 | 18:45 | 12 h 08 min | 73.5° |
| October | 06:42 | 12:32 | 18:22 | 11 h 40 min | 62.1° |
| November | 06:55 | 12:33 | 18:12 | 11 h 16 min | 53.0° |
| December | 07:12 | 12:46 | 18:19 | 11 h 07 min | 49.5° |
A year of daylight in Guerou
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 Guerou
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
16°collects the most energy over a year: 1849 kWh per kWp.
19°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° | 1787 | 97% | 3.96 | 1.4× |
| 15° | 1848 | 100% | 4.65 | 1.2× |
| 16° year-round best | 1849 | 100% | 4.69 | 1.2× |
| 17° = latitude | 1849 | 100% | 4.73 | 1.2× |
| 19° off-grid best | 1847 | 100% | 4.80 | 1.2× |
| 30° | 1807 | 98% | 5.08 | 1.3× |
| 45° | 1666 | 90% | 5.20 | 1.5× |
| 60° | 1436 | 78% | 5.02 | 1.9× |
| 70° | 1242 | 67% | 4.74 | 2.4× |
| 90° | 848 | 46% | 3.80 | 3.1× |
A fixed array in Guerou produces the most over a year at 16°. The design month for an off-grid system is December: at 19° it makes 4.80 kWh per kWp a day, 2% more than at 16°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Guerou at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 16° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 16° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.21 | 5.70 | 4.74 | 4.87 | 21.5 °C |
| February | 5.90 | 5.33 | 4.39 | 5.20 | 24.3 °C |
| March | 6.82 | 4.81 | 3.89 | 5.61 | 28.1 °C |
| April | 7.28 | 3.69 | 2.93 | 5.57 | 31.7 °C |
| May | 7.27 | 2.84 | 2.21 | 5.27 | 34.6 °C |
| June | 6.98 | 2.55 | 1.97 | 4.97 | 35.0 °C |
| July | 6.71 | 2.58 | 2.02 | 4.88 | 32.1 °C |
| August | 6.44 | 2.98 | 2.37 | 4.88 | 30.2 °C |
| September | 6.23 | 3.90 | 3.12 | 4.96 | 30.0 °C |
| October | 5.97 | 4.93 | 3.96 | 5.04 | 29.6 °C |
| November | 5.36 | 5.60 | 4.56 | 4.86 | 26.5 °C |
| December | 4.96 | 5.73 | 4.74 | 4.69 | 22.9 °C |
| Year | 6.26 avg | 4.21 avg | 1242 kWh | 1849 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 600 Wp of panels at 70°, versus 250 Wp at 16°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Guerou
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.
2.5 mrow pitch at 70°
2.4 mrow pitch at 16°
How Guerou compares in Mauritania
Against the other 25 places in Mauritania with climate data, for a fixed array at its best angle.
5thof 26 places in Mauritania for sunshine: 6.26 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Mauritania: 1,849 against 1,845 kWh per kWp.
−4 mindaylight on the longest day, compared with Nouakchott: 13 h 09 min against 13 h 13 min.
16°best year-round tilt here; across Mauritania it runs from 15° in Sélibaby to 22° in Zouérat.
Of the 26 places in Mauritania, Boutilimitt and one other place get the most sun (6.37 peak sun hours a day) and El ’Ayoûn the least (6.03); Guerou ranks 5th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.98 kWh a day here, against 1.95 kWh on average in Mauritania. The shortest day lasts 11 h 07 min, +4 min compared with Nouakchott.
Solar forecast for Guerou, 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 Guerou
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A free, live card for Guerou: 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.