Saint Gallen · Switzerland · 47.23° N · 8.84° E
Solar position in Jona
Sun position, daylight and the best solar panel angle for Jona — computed for 47.23° N, 8.84° E, 424 m above sea level.
The sun right now
Sun in Jona today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:13 | sun 18° below horizon |
| Nautical dawn | 06:48 | 12° below |
| Civil dawn | 07:24 | 6° below |
| Sunrise | 07:55 | 107° ESE |
| Golden hour ends | 08:38 | sun 6° up |
| Solar noon | 13:08 | 31.0° high |
| Golden hour starts | 17:38 | sun 6° up |
| Sunset | 18:21 | 253° WSW |
| Civil dusk | 18:52 | 6° below |
| Nautical dusk | 19:28 | 12° below |
| Astronomical dusk | 20:03 | 18° below |
| Day length | 10 h 25 min | |
Sun path diagram for Jona
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 66.2° at solar noon in Jona; on the December solstice only 19.4°. 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 | 08:02 | 12:36 | 17:10 | 9 h 08 min | 23.0° |
| February | 07:19 | 12:38 | 17:57 | 10 h 38 min | 32.3° |
| March | 06:25 | 12:32 | 18:38 | 12 h 13 min | 43.1° |
| April | 06:25 | 13:23 | 20:21 | 13 h 56 min | 54.7° |
| May | 05:41 | 13:21 | 21:01 | 15 h 19 min | 63.0° |
| June | 05:28 | 13:26 | 21:24 | 15 h 56 min | 66.2° |
| July | 05:50 | 13:31 | 21:11 | 15 h 21 min | 63.2° |
| August | 06:29 | 13:27 | 20:25 | 13 h 57 min | 54.8° |
| September | 07:09 | 13:17 | 19:24 | 12 h 15 min | 43.4° |
| October | 07:51 | 13:08 | 18:26 | 10 h 35 min | 32.0° |
| November | 07:37 | 12:10 | 16:43 | 9 h 06 min | 22.8° |
| December | 08:08 | 12:22 | 16:36 | 8 h 29 min | 19.4° |
A year of daylight in Jona
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 Jona
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
39°collects the most energy over a year: 1262 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° | 1033 | 82% | 0.80 | 5.9× |
| 15° | 1174 | 93% | 1.24 | 3.9× |
| 30° | 1250 | 99% | 1.62 | 2.9× |
| 39° year-round best | 1262 | 100% | 1.80 | 2.5× |
| 45° | 1256 | 100% | 1.90 | 2.3× |
| 47° = latitude | 1251 | 99% | 1.93 | 2.2× |
| 60° | 1192 | 94% | 2.06 | 1.9× |
| 70° | 1113 | 88% | 2.10 | 1.7× |
| 72° off-grid best | 1093 | 87% | 2.10 | 1.7× |
| 90° | 880 | 70% | 2.01 | 1.5× |
A fixed array in Jona produces the most over a year at 39°. The design month for an off-grid system is December: at 72° it makes 2.10 kWh per kWp a day, 17% more than at 39°, and costs 13% of the yearly total. Why steep panels win winter.
Off-grid solar in Jona at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 39° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 39° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.27 | 2.73 | 2.48 | 2.13 | -2.1 °C |
| February snow | 2.11 | 3.40 | 3.08 | 2.91 | -1.4 °C |
| March | 3.33 | 4.03 | 3.60 | 3.84 | 2.8 °C |
| April | 4.42 | 4.02 | 3.52 | 4.24 | 7.5 °C |
| May | 5.04 | 3.71 | 3.18 | 4.23 | 11.7 °C |
| June | 5.77 | 3.81 | 3.21 | 4.52 | 15.9 °C |
| July | 5.72 | 3.92 | 3.29 | 4.55 | 17.6 °C |
| August | 4.90 | 4.06 | 3.42 | 4.32 | 17.1 °C |
| September | 3.73 | 4.07 | 3.50 | 3.90 | 13.0 °C |
| October | 2.38 | 3.42 | 2.98 | 2.98 | 8.8 °C |
| November | 1.36 | 2.51 | 2.23 | 2.04 | 3.2 °C |
| December snow | 1.02 | 2.33 | 2.10 | 1.80 | -1.1 °C |
| Year | 3.43 avg | 3.50 avg | 1113 kWh | 1262 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 560 Wp of panels at 70°, versus 660 Wp at 39°. The steep array is 14% smaller for the same winter. Size your own system.
Row spacing in Jona
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 39°
How Jona compares in Switzerland
Against the other 72 places in Switzerland with climate data, for a fixed array at its best angle.
43rdof 73 places in Switzerland for sunshine, shared: 3.43 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Switzerland: 1,262 against 1,282 kWh per kWp.
−1 mindaylight on the longest day, compared with Zürich: 15 h 56 min against 15 h 57 min.
39°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); Jona ranks joint 43rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.10 kWh a day here, against 2.10 kWh on average in Switzerland. The shortest day lasts 8 h 29 min, +1 min compared with Zürich.
Solar forecast for Jona, 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 Jona
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A free, live card for Jona: 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.