Solarposition.org

Slovenia · 46.05° N · 14.51° E

Solar position in Ljubljana

Sun position, daylight and the best solar panel angle for Ljubljana — computed for 46.05° N, 14.51° E, 295 m above sea level.

Sunrise today07:31106° ESE
Sunset today18:00254° WSW
Best panel angle37°year-round, facing south
Off-grid angle71°best for the darkest month

The sun right now

Azimuth180.0°
Elevation32.1°
At solar noon, 12:45Open on the sun map

Sun in Ljubljana today

Saturday, 24 October 2026 · local time UTC+2

EventTimeDirection / height
Astronomical dawn05:50sun 18° below horizon
Nautical dawn06:2512° below
Civil dawn07:006° below
Sunrise07:31106° ESE
Golden hour ends08:13sun 6° up
Solar noon12:4532.1° high
Golden hour starts17:18sun 6° up
Sunset18:00254° WSW
Civil dusk18:316° below
Nautical dusk19:0612° below
Astronomical dusk19:4018° below
Day length10 h 29 min

Sun path diagram for Ljubljana

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 solstice67891011121314151617181920EquinoxDecember solstice8910111213141516Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 67.4° at solar noon in Ljubljana; on the December solstice only 20.6°. Sunrise swings from 54° NE in June to 124° SE in December — a 70° 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
January07:3512:1316:519 h 15 min24.1°
February06:5512:1517:3610 h 41 min33.5°
March06:0312:0918:1512 h 12 min44.3°
April06:0513:0019:5613 h 51 min55.9°
May05:2312:5820:3415 h 11 min64.2°
June05:1013:0320:5615 h 46 min67.4°
July05:3113:0820:4415 h 13 min64.4°
August06:0813:0420:0013 h 52 min56.0°
September06:4712:5419:0112 h 14 min44.6°
October07:2612:4618:0510 h 39 min33.2°
November07:1011:4716:249 h 14 min24.0°
December07:4112:0016:198 h 38 min20.6°

A year of daylight in Ljubljana

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 Ljubljana

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

37°collects the most energy over a year: 1274 kWh per kWp.

71°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 37°Best worst-month 71°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°106083%0.845.9×
15°119694%1.274.0×
30°126699%1.643.0×
37° year-round best1274100%1.792.7×
45°126499%1.922.4×
46° = latitude126199%1.932.3×
60°119193%2.081.9×
70°110587%2.111.7×
71° off-grid best109586%2.111.7×
90°86168%2.011.5×

A fixed array in Ljubljana produces the most over a year at 37°. The design month for an off-grid system is December: at 71° it makes 2.11 kWh per kWp a day, 18% more than at 37°, and costs 14% of the yearly total. Why steep panels win winter.

Off-grid solar in Ljubljana at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 37° (year-round best).

0123456January: 2.39 (70°)2.4JanFebruary: 2.99 (70°)3.0FebMarch: 3.43 (70°)3.4MarApril: 3.43 (70°)3.4AprMay: 3.29 (70°)3.3MayJune: 3.26 (70°)3.3JunJuly: 3.39 (70°)3.4JulAugust: 3.56 (70°)3.6AugSeptember: 3.36 (70°)3.4SepOctober: 2.99 (70°)3.0OctNovember: 2.13 (70°)2.1NovDecember: 2.11 (70°)2.1Dec37°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 37°Mean temp.
January snow1.302.642.392.07-1.9 °C
February snow2.093.312.992.82-0.9 °C
March3.253.853.433.683.3 °C
April4.403.933.434.188.3 °C
May5.333.853.294.4712.8 °C
June6.003.883.264.7017.0 °C
July6.084.063.394.8219.0 °C
August5.224.253.564.5818.7 °C
September3.693.933.363.7813.6 °C
October2.443.442.992.999.1 °C
November1.362.412.131.954.3 °C
December snow1.062.342.111.79-0.5 °C
Year3.53 avg3.49 avg1105 kWh1274 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 37°. The steep array is 15% smaller for the same winter. Size your own system.

Row spacing in Ljubljana

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.

6.7 mrow pitch at 70°

5.4 mrow pitch at 37°

Row spacing calculator

How Ljubljana compares in Slovenia

Against the other 8 places in Slovenia with climate data, for a fixed array at its best angle.

3rdof 9 places in Slovenia for sunshine: 3.53 peak sun hours a day on flat ground.

±0%solar energy a year compared with the average place in Slovenia: 1,274 against 1,273 kWh per kWp.

−1 mindaylight on the longest day, compared with the average place in Slovenia: 15 h 46 min against 15 h 47 min.

37°best year-round tilt here; across Slovenia it runs from 36° in Koper to 38° in Maribor.

Of the 9 places in Slovenia, Koper gets the most sun (3.77 peak sun hours a day) and Maribor the least (3.47); Ljubljana ranks 3rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.11 kWh a day here, against 2.10 kWh on average in Slovenia. The shortest day lasts 8 h 38 min, +1 min compared with the average.

The sunniest places in Slovenia

Solar forecast for Ljubljana, 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 Ljubljana

What is the best solar panel angle in Ljubljana?
For a fixed array facing south, the best year-round tilt in Ljubljana is 37°, worth about 1274 kWh per kWp a year. An off-grid system that has to get through December does better at about 71°.
What time is sunrise and sunset in Ljubljana today?
On 24 October 2026 the sun rises at 07:31 and sets at 18:00 local time (UTC+2), giving 10 h 29 min of daylight. Solar noon is at 12:45.
How many peak sun hours does Ljubljana get?
On a flat surface 3.5 hours a day averaged over the year, from 1.1 in December to 6.1 in July. Panels tilted at 70° receive 2.3 sun hours a day in December.
How high does the sun get in Ljubljana?
At solar noon the sun stands 67.4° above the horizon on the June solstice and 20.6° on the December solstice.
Is Ljubljana a good place for solar panels?
With 3.5 peak sun hours a day on flat ground, Ljubljana ranks 3rd of 9 places in Slovenia for sunshine. A 1 kWp array at the best angle (37°) makes about 1,274 kWh a year here, as much as the average place in Slovenia.

Places near Ljubljana

All places in Slovenia

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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.