Location data · Thuringia
Sun hours in Weimar
How sunny is Weimar? Over a year the sun delivers 1,322 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 3.62 peak sun hours per day in Weimar. In 9 out of 10 years at least 1,227 kWh/m² are reached. All values are computed from this location’s satellite hourly data, not estimated.
- Annual average (PSH)
- 3.62 kWh/m²/d
- P90 annual total
- 1,227 kWh/m²
- Optimal tilt
- 35°
- Terrain horizon max.
- 7.3°
Sun hours per month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PSH/day (35° south) | 1.35 | 2.28 | 3.59 | 4.86 | 5.22 | 5.53 | 5.47 | 4.93 | 4.25 | 2.89 | 1.76 | 1.26 |
| P90 | 1.03 | 1.61 | 2.63 | 3.86 | 4.59 | 4.90 | 4.79 | 4.19 | 3.50 | 2.32 | 1.31 | 0.99 |
Daily average per month in kWh/m² at 35° tilt, south-facing, including the terrain horizon of Weimar. P90 = reached in 9 out of 10 years.
Optimal tilt angle in Weimar
The annual optimum for Weimar 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 15.0 % versus the optimum. Adjusting twice a year would add 3.5 % here, monthly adjustment 4.1 % — only relevant for adjustable mounts.
Is a balcony solar kit worth it in Weimar?
A vertical south-facing railing in Weimar harvests 948 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 114 % of the 35° December value, computed from the same hourly data with its own plane transposition. Open the balcony solar calculator with these coordinates →