Location data · Hesse
Sun hours in Frankfurt am Main
How sunny is Frankfurt am Main? Over a year the sun delivers 1,372 kilowatt-hours onto every square metre here — in June roughly 5 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 3.76 peak sun hours per day in Frankfurt am Main. In 9 out of 10 years at least 1,281 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.76 kWh/m²/d
- P90 annual total
- 1,281 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 1.9°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.46 | 2.48 | 3.79 | 5.13 | 5.33 | 5.74 | 5.66 | 5.20 | 4.54 | 2.91 | 1.66 | 1.16 |
| P90 | 1.10 | 1.85 | 2.97 | 4.35 | 4.57 | 4.90 | 5.10 | 4.52 | 3.85 | 2.33 | 1.33 | 0.86 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Frankfurt am Main. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Frankfurt am Main
The annual optimum for Frankfurt am Main is 35° south; anything between 24° and 51° counts as equivalent (below 2% difference). For winter operation (off-grid) 60° is optimal, for summer use 20°. Flat-laid modules lose 15.1 % versus the optimum. Adjusting twice a year would add 2.6 % here, monthly adjustment 3.3 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Frankfurt am Main?
A vertical south-facing railing in Frankfurt am Main harvests 973 kWh/m² per year — 71 % 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
- Maintal3.79 kWh/m²/d11 km
- Bad Homburg vor der Höhe3.70 kWh/m²/d13 km
- Hanau3.73 kWh/m²/d17 km