Solar energy in San Antonio, United States
Average irradiation 4.83 kWh/m²/day · ~1410 kWh per kWp per year
Monthly solar irradiation & temperature in San Antonio (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 3.08 | 10.1 | 75 |
| Feb | 3.61 | 12.4 | 88 |
| Mar | 4.53 | 16.8 | 110 |
| Apr | 5.37 | 21.1 | 131 |
| May | 5.85 | 24.9 | 142 |
| Jun | 6.67 | 28.2 | 162 |
| Jul | 6.69 | 28.9 | 163 |
| Aug | 6.43 | 29.6 | 156 |
| Sep | 5.21 | 26.0 | 127 |
| Oct | 4.42 | 21.3 | 108 |
| Nov | 3.32 | 15.7 | 81 |
| Dec | 2.80 | 11.1 | 68 |
Solar potential of San Antonio explained
San Antonio receives an average of 4.83 kilowatt-hours of solar energy per square metre per day, measured over four decades of satellite observation. In practical terms, every kilowatt-peak of installed PV capacity yields about 1410 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places San Antonio among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in San Antonio?
With 4.83 kWh/m²/day of average irradiation, a 1 kWp system in San Antonio produces roughly 1410 kWh per year. That is an excellent solar resource — payback periods are typically among the shortest worldwide.
How much electricity would a 5 kW system produce in San Antonio?
Approximately 7,000 kWh per year — enough to cover a large share of a typical household's consumption.
What data is this based on?
Long-term satellite observations from NASA POWER (1981–present) and the PVGIS SARAH3 database, assuming a performance ratio of 80%.
Compare with nearby cities
New York (4) · Los Angeles (5.4) · Phoenix (5.9) · Houston (4.7) · Miami (5.1) · Denver (5) · all cities →