Location data · Carinthia
Sun hours in Klagenfurt am Wörthersee
How sunny is Klagenfurt am Wörthersee? Over a year the sun delivers 1,433 kilowatt-hours onto every square metre here — in June roughly 2 times as much per day as in December. “Sun hours” has two meanings: the weather report counts how long the sun shines. For solar power what matters is how much energy arrives — and that is what this page shows, as peak sun hours (hours of full sun power).
For solar planning this means: an optimally tilted, south-facing array (35°) harvests an annual average of 3.93 peak sun hours per day in Klagenfurt am Wörthersee. In 9 out of 10 years at least 1,318 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.93 kWh/m²/d
- P90 annual total
- 1,318 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 30.2°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 2.58 | 3.41 | 4.12 | 4.51 | 4.59 | 5.30 | 5.61 | 5.07 | 4.18 | 3.26 | 2.20 | 2.25 |
| P90 | 1.81 | 2.38 | 3.32 | 3.78 | 3.54 | 4.56 | 5.04 | 4.27 | 3.51 | 2.66 | 1.39 | 1.65 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Klagenfurt am Wörthersee. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Klagenfurt am Wörthersee
The annual optimum for Klagenfurt am Wörthersee is 40° south; anything between 25° and 51° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 16.4 % versus the optimum. Adjusting twice a year would add 3.7 % here, monthly adjustment 4.5 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Klagenfurt am Wörthersee?
A vertical south-facing railing in Klagenfurt am Wörthersee harvests 1,027 kWh/m² per year — 72 % of what an optimally tilted 35° panel yields at the same spot. December softens the penalty: with the low winter sun, the vertical plane reaches 113 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →