| Weather conditions | Radiation (W/m2) | Share of diffuse radiation (%) |
| Clear | 800 - 1000 | 10 |
| Cloudy | 600 - 900 | up to 50 |
| Foggy day in autumn | 100 - 300 | 100 |
| Overcast day in winter | 50 | 100 |
| Annual average | 600 | 50 - 60 |
| Weather conditions | Radiation (W/m2) | Share of diffuse radiation (%) |
| Clear | 800 - 1000 | 10 |
| Cloudy | 600 - 900 | up to 50 |
| Foggy day in autumn | 100 - 300 | 100 |
| Overcast day in winter | 50 | 100 |
| Annual average | 600 | 50 - 60 |
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