Senegal · 16.02° N · 16.49° W
Solar position in Saint-Louis
Sun position, daylight and the best solar panel angle for Saint-Louis — computed for 16.02° N, 16.49° W, 8 m above sea level.
The sun right now
Sun in Saint-Louis today
Saturday, 24 October 2026 · local time UTC
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:47 | sun 18° below horizon |
| Nautical dawn | 06:13 | 12° below |
| Civil dawn | 06:38 | 6° below |
| Sunrise | 07:00 | 102° ESE |
| Golden hour ends | 07:29 | sun 6° up |
| Solar noon | 12:50 | 62.1° high |
| Golden hour starts | 18:10 | sun 6° up |
| Sunset | 18:39 | 258° WSW |
| Civil dusk | 19:01 | 6° below |
| Nautical dusk | 19:27 | 12° below |
| Astronomical dusk | 19:52 | 18° below |
| Day length | 11 h 39 min | |
Sun path diagram for Saint-Louis
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 82.6° at solar noon in Saint-Louis; on the December solstice only 50.6°. 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 | 07:37 | 13:17 | 18:57 | 11 h 20 min | 54.2° |
| February | 07:28 | 13:19 | 19:10 | 11 h 43 min | 63.6° |
| March | 07:09 | 13:13 | 19:17 | 12 h 08 min | 74.4° |
| April | 06:47 | 13:04 | 19:22 | 12 h 35 min | 86.0° |
| May | 06:34 | 13:02 | 19:30 | 12 h 56 min | 85.8° |
| June | 06:35 | 13:07 | 19:40 | 13 h 05 min | 82.6° |
| July | 06:44 | 13:12 | 19:40 | 12 h 56 min | 85.6° |
| August | 06:51 | 13:09 | 19:26 | 12 h 35 min | 86.0° |
| September | 06:54 | 12:58 | 19:02 | 12 h 08 min | 74.6° |
| October | 06:59 | 12:50 | 18:41 | 11 h 42 min | 63.2° |
| November | 07:11 | 12:51 | 18:31 | 11 h 20 min | 54.0° |
| December | 07:28 | 13:04 | 18:39 | 11 h 11 min | 50.6° |
A year of daylight in Saint-Louis
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 Saint-Louis
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
15°collects the most energy over a year: 1785 kWh per kWp.
16°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° | 1733 | 97% | 3.82 | 1.5× |
| 15° year-round best | 1785 | 100% | 4.47 | 1.3× |
| 16° off-grid best = latitude | 1785 | 100% | 4.50 | 1.2× |
| 30° | 1739 | 97% | 4.85 | 1.4× |
| 45° | 1596 | 89% | 4.95 | 1.6× |
| 60° | 1368 | 77% | 4.75 | 2.0× |
| 70° | 1178 | 66% | 4.47 | 2.5× |
| 90° | 801 | 45% | 3.56 | 3.0× |
A fixed array in Saint-Louis produces the most over a year at 15°. The design month for an off-grid system is December: at 16° it makes 4.50 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Saint-Louis at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 15° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 15° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.09 | 5.44 | 4.53 | 4.70 | 21.7 °C |
| February | 5.75 | 5.11 | 4.25 | 5.09 | 21.8 °C |
| March | 6.68 | 4.61 | 3.82 | 5.61 | 22.6 °C |
| April | 7.06 | 3.43 | 2.82 | 5.60 | 22.8 °C |
| May | 6.96 | 2.57 | 2.08 | 5.27 | 24.1 °C |
| June | 6.46 | 2.30 | 1.83 | 4.79 | 26.2 °C |
| July | 6.08 | 2.33 | 1.85 | 4.53 | 27.4 °C |
| August | 5.93 | 2.76 | 2.20 | 4.54 | 27.9 °C |
| September | 5.75 | 3.55 | 2.86 | 4.60 | 28.3 °C |
| October | 5.75 | 4.65 | 3.76 | 4.85 | 28.3 °C |
| November | 5.18 | 5.30 | 4.33 | 4.66 | 26.0 °C |
| December | 4.81 | 5.42 | 4.47 | 4.47 | 23.4 °C |
| Year | 5.96 avg | 3.95 avg | 1178 kWh | 1785 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 640 Wp of panels at 70°, versus 260 Wp at 15°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Saint-Louis
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.
2.4 mrow pitch at 70°
2.4 mrow pitch at 15°
How Saint-Louis compares in Senegal
Against the other 64 places in Senegal with climate data, for a fixed array at its best angle.
25thof 65 places in Senegal for sunshine, shared: 5.96 peak sun hours a day on flat ground.
+2%solar energy a year compared with the average place in Senegal: 1,785 against 1,758 kWh per kWp.
+5 mindaylight on the longest day, compared with Dakar: 13 h 05 min against 13 h 00 min.
15°best year-round tilt here; across Senegal it runs from 14° in Kaolack to 16° in Richard-Toll.
Of the 65 places in Senegal, Ndioum gets the most sun (6.17 peak sun hours a day) and Ziguinchor the least (5.63); Saint-Louis ranks joint 25th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.83 kWh a day here, against 1.69 kWh on average in Senegal. The shortest day lasts 11 h 11 min, −5 min compared with Dakar.
Solar forecast for Saint-Louis, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
Loading the latest forecast…
Questions about the sun in Saint-Louis
What is the best solar panel angle in Saint-Louis?
What time is sunrise and sunset in Saint-Louis today?
How many peak sun hours does Saint-Louis get?
How high does the sun get in Saint-Louis?
Is Saint-Louis a good place for solar panels?
Places near Saint-Louis
Put this on your site
A free, live card for Saint-Louis: 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.