Styria · Austria · 47.07° N · 15.44° E
Solar position in Graz
Sun position, daylight and the best solar panel angle for Graz — computed for 47.07° N, 15.44° E, 362 m above sea level.
The sun right now
Sun in Graz today
Saturday, 24 October 2026 · local time UTC+2
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:46 | sun 18° below horizon |
| Nautical dawn | 06:22 | 12° below |
| Civil dawn | 06:57 | 6° below |
| Sunrise | 07:29 | 106° ESE |
| Golden hour ends | 08:11 | sun 6° up |
| Solar noon | 12:42 | 31.1° high |
| Golden hour starts | 17:12 | sun 6° up |
| Sunset | 17:55 | 253° WSW |
| Civil dusk | 18:26 | 6° below |
| Nautical dusk | 19:01 | 12° below |
| Astronomical dusk | 19:37 | 18° below |
| Day length | 10 h 26 min | |
Sun path diagram for Graz
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 66.4° at solar noon in Graz; on the December solstice only 19.5°. Sunrise swings from 53° NE in June to 125° SE in December — a 71° 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 | 07:35 | 12:09 | 16:44 | 9 h 09 min | 23.1° |
| February | 06:52 | 12:12 | 17:31 | 10 h 38 min | 32.5° |
| March | 05:59 | 12:05 | 18:12 | 12 h 12 min | 43.3° |
| April | 05:59 | 12:57 | 19:55 | 13 h 55 min | 54.9° |
| May | 05:16 | 12:54 | 20:34 | 15 h 18 min | 63.2° |
| June | 05:02 | 13:00 | 20:57 | 15 h 54 min | 66.4° |
| July | 05:24 | 13:04 | 20:44 | 15 h 20 min | 63.4° |
| August | 06:02 | 13:01 | 19:58 | 13 h 56 min | 55.0° |
| September | 06:43 | 12:51 | 18:58 | 12 h 15 min | 43.6° |
| October | 07:24 | 12:42 | 18:00 | 10 h 36 min | 32.2° |
| November | 07:10 | 11:43 | 16:17 | 9 h 07 min | 23.0° |
| December | 07:41 | 11:56 | 16:11 | 8 h 30 min | 19.5° |
A year of daylight in Graz
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 Graz
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: 1220 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° | 1002 | 82% | 0.80 | 5.7× |
| 15° | 1136 | 93% | 1.23 | 3.8× |
| 30° | 1209 | 99% | 1.60 | 2.9× |
| 39° year-round best | 1220 | 100% | 1.78 | 2.5× |
| 45° | 1214 | 99% | 1.88 | 2.2× |
| 47° = latitude | 1209 | 99% | 1.91 | 2.2× |
| 60° | 1152 | 94% | 2.04 | 1.8× |
| 70° | 1075 | 88% | 2.08 | 1.6× |
| 72° off-grid best | 1057 | 87% | 2.08 | 1.6× |
| 90° | 852 | 70% | 1.99 | 1.4× |
A fixed array in Graz produces the most over a year at 39°. The design month for an off-grid system is December: at 72° it makes 2.08 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 Graz 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 | 1.25 | 2.66 | 2.42 | 2.08 | -2.5 °C |
| February snow | 2.07 | 3.29 | 2.98 | 2.83 | -1.3 °C |
| March | 3.19 | 3.80 | 3.39 | 3.63 | 2.8 °C |
| April | 4.29 | 3.88 | 3.39 | 4.08 | 8.1 °C |
| May | 5.00 | 3.68 | 3.14 | 4.17 | 12.7 °C |
| June | 5.52 | 3.67 | 3.07 | 4.30 | 17.0 °C |
| July | 5.55 | 3.82 | 3.19 | 4.39 | 19.1 °C |
| August | 4.82 | 3.98 | 3.33 | 4.21 | 18.6 °C |
| September | 3.50 | 3.74 | 3.20 | 3.59 | 13.4 °C |
| October | 2.40 | 3.45 | 3.01 | 3.01 | 8.6 °C |
| November | 1.34 | 2.43 | 2.16 | 1.98 | 3.6 °C |
| December snow | 1.02 | 2.30 | 2.08 | 1.78 | -1.3 °C |
| Year | 3.34 avg | 3.39 avg | 1075 kWh | 1220 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 570 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 Graz
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.
7.1 mrow pitch at 70°
5.8 mrow pitch at 39°
How Graz compares in Austria
Against the other 28 places in Austria with climate data, for a fixed array at its best angle.
14thof 29 places in Austria for sunshine: 3.34 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Austria: 1,220 against 1,220 kWh per kWp.
−10 mindaylight on the longest day, compared with Vienna: 15 h 54 min against 16 h 05 min.
39°best year-round tilt here; across Austria it runs from 37° in Vienna to 41° in Innsbruck.
Of the 29 places in Austria, Villach gets the most sun (3.45 peak sun hours a day) and Linz and 4 other places the least (3.22); Graz ranks 14th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.08 kWh a day here, against 1.92 kWh on average in Austria. The shortest day lasts 8 h 30 min, +10 min compared with Vienna.
Solar forecast for Graz, 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 Graz
What is the best solar panel angle in Graz?
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Places near Graz
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A free, live card for Graz: 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.