Location data · Upper Austria
Sun hours in Linz
How sunny is Linz? Over a year the sun delivers 1,437 kilowatt-hours onto every square metre here — in June roughly 4 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 3.94 peak sun hours per day in Linz. In 9 out of 10 years at least 1,374 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.94 kWh/m²/d
- P90 annual total
- 1,374 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 2.7°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.60 | 2.83 | 4.00 | 5.26 | 5.29 | 5.84 | 5.83 | 5.40 | 4.61 | 3.29 | 1.84 | 1.40 |
| P90 | 1.27 | 2.02 | 3.04 | 4.40 | 4.24 | 5.11 | 5.00 | 4.67 | 3.81 | 2.77 | 1.60 | 1.11 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Linz. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Linz
The annual optimum for Linz is 35° south; anything between 24° and 51° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 15.7 % versus the optimum. Adjusting twice a year would add 3.1 % here, monthly adjustment 3.7 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Linz?
A vertical south-facing railing in Linz harvests 1,011 kWh/m² per year — 70 % 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 108 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →