Île-de-France · France · 49.01° N · 2.47° E
Solar position in Goussainville
Sun position, daylight and the best solar panel angle for Goussainville — computed for 49.01° N, 2.47° E, 73 m above sea level.
The sun right now
Sun in Goussainville today
Sunday, 25 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:39 | sun 18° below horizon |
| Nautical dawn | 06:16 | 12° below |
| Civil dawn | 06:53 | 6° below |
| Sunrise | 07:26 | 108° ESE |
| Golden hour ends | 08:11 | sun 6° up |
| Solar noon | 12:33 | 28.8° high |
| Golden hour starts | 16:56 | sun 6° up |
| Sunset | 17:41 | 252° WSW |
| Civil dusk | 18:14 | 6° below |
| Nautical dusk | 18:51 | 12° below |
| Astronomical dusk | 19:27 | 18° below |
| Day length | 10 h 15 min | |
Sun path diagram for Goussainville
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 64.4° at solar noon in Goussainville; on the December solstice only 17.6°. Sunrise swings from 51° NE in June to 126° SE in December — a 75° 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 | 08:33 | 13:01 | 17:29 | 8 h 56 min | 21.2° |
| February | 07:47 | 13:04 | 18:20 | 10 h 32 min | 30.6° |
| March | 06:51 | 12:57 | 19:04 | 12 h 13 min | 41.4° |
| April | 06:47 | 13:49 | 20:51 | 14 h 03 min | 53.0° |
| May | 06:00 | 13:46 | 21:33 | 15 h 33 min | 61.2° |
| June | 05:45 | 13:51 | 21:58 | 16 h 12 min | 64.4° |
| July | 06:08 | 13:56 | 21:43 | 15 h 35 min | 61.4° |
| August | 06:50 | 13:53 | 20:54 | 14 h 04 min | 53.0° |
| September | 07:35 | 13:42 | 19:50 | 12 h 15 min | 41.6° |
| October | 08:19 | 13:34 | 18:48 | 10 h 29 min | 30.2° |
| November | 08:08 | 12:35 | 17:02 | 8 h 54 min | 21.1° |
| December | 08:41 | 12:48 | 16:54 | 8 h 13 min | 17.6° |
A year of daylight in Goussainville
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 Goussainville
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: 1172 kWh per kWp.
70°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° | 968 | 83% | 0.58 | 8.1× |
| 15° | 1096 | 93% | 0.90 | 5.4× |
| 30° | 1163 | 99% | 1.17 | 4.0× |
| 38° year-round best | 1172 | 100% | 1.29 | 3.5× |
| 45° | 1165 | 99% | 1.37 | 3.2× |
| 49° = latitude | 1154 | 98% | 1.41 | 3.0× |
| 60° | 1102 | 94% | 1.49 | 2.7× |
| 70° off-grid best | 1026 | 88% | 1.51 | 2.4× |
| 90° | 806 | 69% | 1.43 | 2.0× |
A fixed array in Goussainville produces the most over a year at 38°. The design month for an off-grid system is December: at 70° it makes 1.51 kWh per kWp a day, 17% more than at 38°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Goussainville 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 | 0.93 | 1.87 | 1.65 | 1.46 | 3.0 °C |
| February | 1.71 | 2.73 | 2.42 | 2.31 | 3.5 °C |
| March | 2.94 | 3.61 | 3.17 | 3.35 | 6.5 °C |
| April | 4.49 | 4.22 | 3.66 | 4.35 | 10.1 °C |
| May | 5.20 | 3.95 | 3.36 | 4.42 | 13.5 °C |
| June | 5.72 | 3.93 | 3.30 | 4.56 | 17.1 °C |
| July | 5.53 | 3.96 | 3.30 | 4.47 | 19.0 °C |
| August | 4.70 | 3.99 | 3.34 | 4.15 | 18.6 °C |
| September | 3.66 | 4.09 | 3.48 | 3.83 | 15.4 °C |
| October | 2.15 | 3.12 | 2.69 | 2.66 | 11.5 °C |
| November | 1.12 | 2.10 | 1.83 | 1.66 | 6.8 °C |
| December | 0.76 | 1.72 | 1.51 | 1.29 | 3.5 °C |
| Year | 3.25 avg | 3.28 avg | 1026 kWh | 1172 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 780 Wp of panels at 70°, versus 910 Wp at 38°. The steep array is 15% smaller for the same winter. Size your own system.
Row spacing in Goussainville
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.
8.0 mrow pitch at 70°
6.4 mrow pitch at 38°
How Goussainville compares in France
Against the other 656 places in France with climate data, for a fixed array at its best angle.
545thof 657 places in France for sunshine, shared: 3.25 peak sun hours a day on flat ground.
−7%solar energy a year compared with the average place in France: 1,172 against 1,261 kWh per kWp.
+2 mindaylight on the longest day, compared with Paris: 16 h 12 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); Goussainville ranks joint 545th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.51 kWh a day here, against 1.86 kWh on average in France. The shortest day lasts 8 h 13 min, −1 min compared with Paris.
Solar forecast for Goussainville, 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 Goussainville
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A free, live card for Goussainville: 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.