Location data · Saxony-Anhalt
Sun hours in Köthen
How sunny is Köthen? Over a year the sun delivers 1,365 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 3.74 peak sun hours per day in Köthen. In 9 out of 10 years at least 1,275 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.74 kWh/m²/d
- P90 annual total
- 1,275 kWh/m²
- Optimal tilt
- 40°
- Terrain horizon max.
- 1.1°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.29 | 2.28 | 3.59 | 5.13 | 5.58 | 5.86 | 5.58 | 5.13 | 4.46 | 2.97 | 1.70 | 1.22 |
| P90 | 0.96 | 1.55 | 2.92 | 4.28 | 4.74 | 5.34 | 5.00 | 4.52 | 3.64 | 2.33 | 1.35 | 0.87 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Köthen. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Köthen
The annual optimum for Köthen is 40° south; anything between 25° and 51° counts as equivalent (below 2% difference). For winter operation (off-grid) 65° is optimal, for summer use 20°. Flat-laid modules lose 16.1 % versus the optimum. Adjusting twice a year would add 3.0 % here, monthly adjustment 3.7 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Köthen?
A vertical south-facing railing in Köthen harvests 986 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 112 % 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
- Bernburg3.71 kWh/m²/d17 km
- Dessau3.67 kWh/m²/d21 km
- Zerbst/Anhalt3.71 kWh/m²/d25 km