Solarposition.org

Île-de-France · France · 48.75° N · 2.51° E

Solar position in Boissy-Saint-Léger

Sun position, daylight and the best solar panel angle for Boissy-Saint-Léger — computed for 48.75° N, 2.51° E, 89 m above sea level.

Sunrise today08:23107° ESE
Sunset today18:43253° WSW
Best panel angle38°year-round, facing south
Off-grid angle70°best for the darkest month

The sun right now

Azimuth180.0°
Elevation29.4°
At solar noon, 13:33Open on the sun map

Sun in Boissy-Saint-Léger today

Saturday, 24 October 2026 · local time UTC+2

EventTimeDirection / height
Astronomical dawn06:38sun 18° below horizon
Nautical dawn07:1412° below
Civil dawn07:516° below
Sunrise08:23107° ESE
Golden hour ends09:08sun 6° up
Solar noon13:3329.4° high
Golden hour starts17:59sun 6° up
Sunset18:43253° WSW
Civil dusk19:166° below
Nautical dusk19:5212° below
Astronomical dusk20:2918° below
Day length10 h 20 min

Sun path diagram for Boissy-Saint-Léger

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice6789101112131415161718192021EquinoxDecember solstice910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 64.7° at solar noon in Boissy-Saint-Léger; on the December solstice only 17.9°. Sunrise swings from 52° NE in June to 126° SE in December — a 74° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January08:3213:0117:308 h 57 min21.5°
February07:4713:0318:2010 h 33 min30.8°
March06:5012:5719:0412 h 13 min41.6°
April06:4713:4820:5014 h 02 min53.2°
May06:0113:4621:3215 h 31 min61.5°
June05:4613:5121:5616 h 10 min64.7°
July06:0913:5621:4215 h 33 min61.7°
August06:5113:5220:5414 h 03 min53.3°
September07:3413:4219:5012 h 15 min41.9°
October08:1913:3418:4910 h 30 min30.5°
November08:0712:3517:038 h 56 min21.3°
December08:4012:4816:558 h 16 min17.9°

A year of daylight in Boissy-Saint-Léger

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Boissy-Saint-Léger

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: 1182 kWh per kWp.

70°gives the most in the darkest month — the one an off-grid system is sized for.

30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 38°Best worst-month 70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°97783%0.598.0×
15°110694%0.925.3×
30°117399%1.204.0×
38° year-round best1182100%1.313.5×
45°117499%1.403.1×
49° = latitude116398%1.443.0×
60°111094%1.512.6×
70° off-grid best103387%1.532.4×
90°81068%1.451.9×

A fixed array in Boissy-Saint-Léger produces the most over a year at 38°. The design month for an off-grid system is December: at 70° it makes 1.53 kWh per kWp a day, 17% more than at 38°, and costs 13% of the yearly total. Why steep panels win winter.

Off-grid solar in Boissy-Saint-Léger at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 38° (year-round best).

012345January: 1.66 (70°)1.7JanFebruary: 2.46 (70°)2.5FebMarch: 3.21 (70°)3.2MarApril: 3.66 (70°)3.7AprMay: 3.36 (70°)3.4MayJune: 3.31 (70°)3.3JunJuly: 3.31 (70°)3.3JulAugust: 3.36 (70°)3.4AugSeptember: 3.51 (70°)3.5SepOctober: 2.72 (70°)2.7OctNovember: 1.86 (70°)1.9NovDecember: 1.53 (70°)1.5Dec38°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 38°Mean temp.
January0.951.881.661.473.0 °C
February1.742.782.462.353.6 °C
March2.983.653.213.396.7 °C
April4.524.233.664.3610.3 °C
May5.223.953.364.4313.8 °C
June5.773.943.314.5817.4 °C
July5.583.983.314.5019.3 °C
August4.754.023.364.1918.9 °C
September3.704.133.513.8715.6 °C
October2.183.152.722.6911.6 °C
November1.152.131.861.686.9 °C
December0.781.741.531.313.5 °C
Year3.28 avg3.30 avg1033 kWh1182 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 770 Wp of panels at 70°, versus 900 Wp at 38°. The steep array is 14% smaller for the same winter. Size your own system.

Row spacing in Boissy-Saint-Léger

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.

7.9 mrow pitch at 70°

6.3 mrow pitch at 38°

Row spacing calculator

How Boissy-Saint-Léger compares in France

Against the other 656 places in France with climate data, for a fixed array at its best angle.

341stof 657 places in France for sunshine, shared: 3.28 peak sun hours a day on flat ground.

−6%solar energy a year compared with the average place in France: 1,182 against 1,261 kWh per kWp.

−1 mindaylight on the longest day, compared with Paris: 16 h 10 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); Boissy-Saint-Léger ranks joint 341st. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.53 kWh a day here, against 1.86 kWh on average in France. The shortest day lasts 8 h 16 min, +1 min compared with Paris.

The sunniest places in France

Solar forecast for Boissy-Saint-Léger, 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 Boissy-Saint-Léger

What is the best solar panel angle in Boissy-Saint-Léger?
For a fixed array facing south, the best year-round tilt in Boissy-Saint-Léger is 38°, worth about 1182 kWh per kWp a year. An off-grid system that has to get through December does better at about 70°.
What time is sunrise and sunset in Boissy-Saint-Léger today?
On 24 October 2026 the sun rises at 08:23 and sets at 18:43 local time (UTC+2), giving 10 h 20 min of daylight. Solar noon is at 13:33.
How many peak sun hours does Boissy-Saint-Léger get?
On a flat surface 3.3 hours a day averaged over the year, from 0.8 in December to 5.8 in June. Panels tilted at 70° receive 1.7 sun hours a day in December.
How high does the sun get in Boissy-Saint-Léger?
At solar noon the sun stands 64.7° above the horizon on the June solstice and 17.9° on the December solstice.
Is Boissy-Saint-Léger a good place for solar panels?
With 3.3 peak sun hours a day on flat ground, Boissy-Saint-Léger ranks joint 341st of 657 places in France for sunshine. A 1 kWp array at the best angle (38°) makes about 1,182 kWh a year here, 6% less than the average place in France.

Places near Boissy-Saint-Léger

All places in France

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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.