Grand Est · France · 47.59° N · 7.56° E
Solar position in Saint-Louis
Sun position, daylight and the best solar panel angle for Saint-Louis — computed for 47.59° N, 7.56° E, 248 m above sea level.
The sun right now
Sun in Saint-Louis today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:18 | sun 18° below horizon |
| Nautical dawn | 06:54 | 12° below |
| Civil dawn | 07:29 | 6° below |
| Sunrise | 08:01 | 107° ESE |
| Golden hour ends | 08:44 | sun 6° up |
| Solar noon | 13:13 | 30.6° high |
| Golden hour starts | 17:42 | sun 6° up |
| Sunset | 18:25 | 253° WSW |
| Civil dusk | 18:57 | 6° below |
| Nautical dusk | 19:33 | 12° below |
| Astronomical dusk | 20:08 | 18° below |
| Day length | 10 h 24 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 65.9° at solar noon in Saint-Louis; on the December solstice only 19.0°. Sunrise swings from 53° NE in June to 125° SE in December — a 72° 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 | 08:08 | 12:41 | 17:13 | 9 h 05 min | 22.6° |
| February | 07:25 | 12:43 | 18:02 | 10 h 37 min | 32.0° |
| March | 06:30 | 12:37 | 18:43 | 12 h 13 min | 42.8° |
| April | 06:30 | 13:28 | 20:27 | 13 h 57 min | 54.4° |
| May | 05:45 | 13:26 | 21:07 | 15 h 22 min | 62.7° |
| June | 05:32 | 13:31 | 21:31 | 15 h 59 min | 65.9° |
| July | 05:53 | 13:36 | 21:17 | 15 h 24 min | 62.8° |
| August | 06:33 | 13:32 | 20:31 | 13 h 58 min | 54.4° |
| September | 07:14 | 13:22 | 19:29 | 12 h 15 min | 43.0° |
| October | 07:57 | 13:14 | 18:30 | 10 h 34 min | 31.6° |
| November | 07:43 | 12:15 | 16:47 | 9 h 04 min | 22.5° |
| December | 08:15 | 12:27 | 16:40 | 8 h 26 min | 19.0° |
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.
38°collects the most energy over a year: 1242 kWh per kWp.
72°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° | 1025 | 83% | 0.69 | 7.1× |
| 15° | 1161 | 94% | 1.06 | 4.8× |
| 30° | 1232 | 99% | 1.37 | 3.6× |
| 38° year-round best | 1242 | 100% | 1.51 | 3.1× |
| 45° | 1234 | 99% | 1.61 | 2.8× |
| 48° = latitude | 1226 | 99% | 1.64 | 2.7× |
| 60° | 1166 | 94% | 1.74 | 2.2× |
| 70° | 1085 | 87% | 1.78 | 2.0× |
| 72° off-grid best | 1066 | 86% | 1.78 | 2.0× |
| 90° | 851 | 68% | 1.70 | 1.7× |
A fixed array in Saint-Louis produces the most over a year at 38°. The design month for an off-grid system is December: at 72° it makes 1.78 kWh per kWp a day, 18% more than at 38°, and costs 14% 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 38° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 38° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.11 | 2.25 | 2.03 | 1.77 | -0.5 °C |
| February snow | 1.92 | 3.12 | 2.81 | 2.63 | 0.3 °C |
| March | 3.17 | 3.89 | 3.45 | 3.65 | 4.3 °C |
| April | 4.47 | 4.11 | 3.58 | 4.30 | 8.8 °C |
| May | 5.16 | 3.82 | 3.26 | 4.35 | 12.9 °C |
| June | 5.97 | 3.96 | 3.33 | 4.70 | 17.0 °C |
| July | 5.85 | 4.04 | 3.37 | 4.68 | 18.6 °C |
| August | 5.01 | 4.18 | 3.51 | 4.43 | 18.1 °C |
| September | 3.79 | 4.19 | 3.58 | 3.98 | 13.9 °C |
| October | 2.35 | 3.38 | 2.94 | 2.92 | 9.6 °C |
| November | 1.27 | 2.33 | 2.06 | 1.87 | 4.2 °C |
| December snow | 0.89 | 1.99 | 1.78 | 1.51 | 0.4 °C |
| Year | 3.42 avg | 3.44 avg | 1085 kWh | 1242 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 660 Wp of panels at 70°, versus 780 Wp at 38°. The steep array is 15% smaller for the same winter. 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.
7.3 mrow pitch at 70°
5.9 mrow pitch at 38°
How Saint-Louis compares in France
Against the other 656 places in France with climate data, for a fixed array at its best angle.
264thof 657 places in France for sunshine: 3.42 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in France: 1,242 against 1,261 kWh per kWp.
−12 mindaylight on the longest day, compared with Paris: 15 h 59 min against 16 h 11 min.
38°best year-round tilt here; across France it runs from 33° in Ajaccio to 39° in Lille.
Of the 657 places in France, Marseille 12 and 5 other places get the most sun (4.46 peak sun hours a day) and Maubeuge and one other place the least (3.10); Saint-Louis ranks 264th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.78 kWh a day here, against 1.86 kWh on average in France. The shortest day lasts 8 h 26 min, +11 min compared with Paris.
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.
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Questions about the sun in Saint-Louis
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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.