Location data · Ticino
Sun hours in Bellinzona
How sunny is Bellinzona? Over a year the sun delivers 1,463 kilowatt-hours onto every square metre here — in June roughly 3 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 4.01 peak sun hours per day in Bellinzona. In 9 out of 10 years at least 1,363 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 4.01 kWh/m²/d
- P90 annual total
- 1,363 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 37.8°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 2.24 | 3.11 | 4.20 | 4.77 | 4.92 | 5.72 | 6.15 | 5.40 | 4.46 | 3.13 | 2.08 | 1.87 |
| P90 | 1.81 | 2.63 | 3.70 | 3.90 | 4.20 | 4.89 | 5.22 | 4.98 | 3.94 | 2.70 | 1.50 | 1.50 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Bellinzona. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Bellinzona
The annual optimum for Bellinzona 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 3.2 % here, monthly adjustment 3.9 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Bellinzona?
A vertical south-facing railing in Bellinzona harvests 1,028 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 106 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →