Saint Gallen · Switzerland · 47.42° N · 9.25° E
Solar position in Gossau
Sun position, daylight and the best solar panel angle for Gossau — computed for 47.42° N, 9.25° E, 637 m above sea level.
The sun right now
Sun in Gossau today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:11 | sun 18° below horizon |
| Nautical dawn | 06:47 | 12° below |
| Civil dawn | 07:22 | 6° below |
| Sunrise | 07:54 | 107° ESE |
| Golden hour ends | 08:37 | sun 6° up |
| Solar noon | 13:06 | 30.8° high |
| Golden hour starts | 17:36 | sun 6° up |
| Sunset | 18:19 | 253° WSW |
| Civil dusk | 18:50 | 6° below |
| Nautical dusk | 19:26 | 12° below |
| Astronomical dusk | 20:01 | 18° below |
| Day length | 10 h 25 min | |
Sun path diagram for Gossau
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 66.0° at solar noon in Gossau; on the December solstice only 19.2°. 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 | 08:01 | 12:34 | 17:07 | 9 h 06 min | 22.8° |
| February | 07:18 | 12:36 | 17:55 | 10 h 37 min | 32.1° |
| March | 06:24 | 12:30 | 18:36 | 12 h 13 min | 42.9° |
| April | 06:23 | 13:21 | 20:20 | 13 h 57 min | 54.5° |
| May | 05:39 | 13:19 | 21:00 | 15 h 21 min | 62.8° |
| June | 05:26 | 13:24 | 21:23 | 15 h 58 min | 66.0° |
| July | 05:47 | 13:29 | 21:10 | 15 h 23 min | 63.0° |
| August | 06:27 | 13:25 | 20:24 | 13 h 57 min | 54.6° |
| September | 07:08 | 13:15 | 19:23 | 12 h 15 min | 43.2° |
| October | 07:50 | 13:07 | 18:24 | 10 h 34 min | 31.8° |
| November | 07:36 | 12:08 | 16:41 | 9 h 05 min | 22.7° |
| December | 08:07 | 12:21 | 16:34 | 8 h 27 min | 19.2° |
A year of daylight in Gossau
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 Gossau
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: 1243 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° | 1024 | 82% | 0.76 | 6.3× |
| 15° | 1161 | 93% | 1.16 | 4.2× |
| 30° | 1233 | 99% | 1.51 | 3.1× |
| 38° year-round best | 1243 | 100% | 1.66 | 2.8× |
| 45° | 1235 | 99% | 1.76 | 2.5× |
| 47° = latitude | 1230 | 99% | 1.79 | 2.4× |
| 60° | 1169 | 94% | 1.92 | 2.0× |
| 70° | 1089 | 88% | 1.95 | 1.8× |
| 72° off-grid best | 1070 | 86% | 1.95 | 1.8× |
| 90° | 857 | 69% | 1.87 | 1.6× |
A fixed array in Gossau produces the most over a year at 38°. The design month for an off-grid system is December: at 72° it makes 1.95 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 Gossau 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 | 1.20 | 2.44 | 2.21 | 1.93 | -1.6 °C |
| February snow | 2.03 | 3.23 | 2.92 | 2.75 | -0.9 °C |
| March | 3.26 | 3.95 | 3.51 | 3.74 | 3.4 °C |
| April | 4.45 | 4.06 | 3.54 | 4.27 | 8.1 °C |
| May | 5.10 | 3.76 | 3.21 | 4.29 | 12.3 °C |
| June | 5.80 | 3.83 | 3.22 | 4.56 | 16.4 °C |
| July | 5.72 | 3.93 | 3.29 | 4.57 | 18.0 °C |
| August | 4.91 | 4.07 | 3.42 | 4.33 | 17.6 °C |
| September | 3.72 | 4.07 | 3.49 | 3.88 | 13.4 °C |
| October | 2.34 | 3.36 | 2.92 | 2.91 | 9.3 °C |
| November | 1.31 | 2.39 | 2.12 | 1.93 | 3.7 °C |
| December snow | 0.97 | 2.17 | 1.95 | 1.66 | -0.5 °C |
| Year | 3.41 avg | 3.44 avg | 1089 kWh | 1243 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 600 Wp of panels at 70°, versus 710 Wp at 38°. The steep array is 15% smaller for the same winter. Size your own system.
Row spacing in Gossau
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.
7.2 mrow pitch at 70°
5.9 mrow pitch at 38°
How Gossau compares in Switzerland
Against the other 72 places in Switzerland with climate data, for a fixed array at its best angle.
56thof 73 places in Switzerland for sunshine, shared: 3.41 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Switzerland: 1,243 against 1,282 kWh per kWp.
±0 mindaylight on the longest day, compared with Zürich: 15 h 58 min against 15 h 57 min.
38°best year-round tilt here; across Switzerland it runs from 38° in Zürich to 40° in Bellinzona.
Of the 73 places in Switzerland, Martigny-Ville and one other place get the most sun (3.64 peak sun hours a day) and Schaffhausen the least (3.37); Gossau ranks joint 56th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.95 kWh a day here, against 2.10 kWh on average in Switzerland. The shortest day lasts 8 h 27 min, ±0 min compared with Zürich.
Solar forecast for Gossau, 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 Gossau
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A free, live card for Gossau: 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.