Solar Irradiance Data: Seattle
10 to 12
Monthly average solar irradiance for 23 representative global locations — GHI, DNI, DHI, tilt irradiance, peak sun hours, clearness index, and temperature. TMY-style reference data for PV system design and solar energy analysis. Each location has 12 monthly records (month=1-12) plus one annual summary row (month=0).
| location | month | DHI kWh per m2 per day (kWh/m2/day) | DNI kWh per m2 per day (kWh/m2/day) | GHI kWh per m2 per day (kWh/m2/day) | avg temp C (C) | clearness index Kt | climate zone | latitude deg (deg) | longitude deg (deg) | peak sun hours (h/day) | tilt latitude kWh per m2 per day (kWh/m2/day) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Seattle | 10 | 0.98 | 1.98 | 1.88 | 10.4 | 0.32 | temperate | 47.6 | -122.3 | 1.88 | 2.08 |
| Seattle | 11 | 0.72 | 1.01 | 1.08 | 6.8 | 0.24 | temperate | 47.6 | -122.3 | 1.08 | 1.18 |
| Seattle | 12 | 0.58 | 0.68 | 0.78 | 4.8 | 0.21 | temperate | 47.6 | -122.3 | 0.78 | 0.88 |
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