Location data · North Rhine-Westphalia
Sun hours in Ibbenbüren
How sunny is Ibbenbüren? Over a year the sun delivers 1,251 kilowatt-hours onto every square metre here — in June roughly 6 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 3.43 peak sun hours per day in Ibbenbüren. In 9 out of 10 years at least 1,178 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.43 kWh/m²/d
- P90 annual total
- 1,178 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 3.8°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.11 | 2.04 | 3.43 | 4.87 | 5.16 | 5.40 | 5.20 | 4.77 | 4.01 | 2.64 | 1.49 | 0.94 |
| P90 | 0.86 | 1.45 | 2.70 | 3.96 | 4.29 | 4.76 | 4.53 | 4.13 | 3.38 | 1.96 | 1.18 | 0.68 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Ibbenbüren. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Ibbenbüren
The annual optimum for Ibbenbüren is 40° 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 14.9 % versus the optimum. Adjusting twice a year would add 3.0 % here, monthly adjustment 3.5 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Ibbenbüren?
A vertical south-facing railing in Ibbenbüren harvests 900 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 120 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →