Location data · Vorarlberg
Sun hours in Feldkirch
How sunny is Feldkirch? Over a year the sun delivers 1,499 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 4.11 peak sun hours per day in Feldkirch. In 9 out of 10 years at least 1,404 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 4.11 kWh/m²/d
- P90 annual total
- 1,404 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 20.6°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 2.54 | 3.64 | 4.51 | 5.12 | 4.76 | 5.37 | 5.39 | 5.05 | 4.60 | 3.77 | 2.33 | 2.17 |
| P90 | 2.02 | 3.07 | 3.77 | 4.31 | 3.91 | 4.47 | 4.55 | 4.15 | 3.91 | 3.21 | 1.69 | 1.47 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Feldkirch. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Feldkirch
The annual optimum for Feldkirch is 40° south; anything between 29° and 55° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 19.7 % versus the optimum. Adjusting twice a year would add 4.1 % here, monthly adjustment 4.9 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Feldkirch?
A vertical south-facing railing in Feldkirch harvests 1,115 kWh/m² per year — 74 % 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 →
Neighbouring places compared
- Dornbirn3.92 kWh/m²/d23 km
- St. Gallen3.91 kWh/m²/d27 km
- Chur3.50 kWh/m²/d43 km