Location data · Zurich
Sun hours in Opfikon
How sunny is Opfikon? Over a year the sun delivers 1,474 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 4.04 peak sun hours per day in Opfikon. In 9 out of 10 years at least 1,383 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 4.04 kWh/m²/d
- P90 annual total
- 1,383 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 3.4°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.82 | 2.93 | 4.22 | 5.28 | 5.29 | 5.86 | 5.92 | 5.43 | 4.81 | 3.29 | 2.01 | 1.53 |
| P90 | 1.19 | 2.13 | 3.22 | 4.24 | 4.55 | 5.10 | 5.25 | 4.68 | 4.30 | 2.80 | 1.58 | 1.22 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Opfikon. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Opfikon
The annual optimum for Opfikon 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 15.8 % versus the optimum. Adjusting twice a year would add 3.0 % here, monthly adjustment 3.9 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Opfikon?
A vertical south-facing railing in Opfikon harvests 1,036 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 107 % 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
- Zürich4.03 kWh/m²/d7 km
- Winterthur3.99 kWh/m²/d14 km
- Frauenfeld3.96 kWh/m²/d28 km