| Monthly Solar Values for SF Zoo |
| Month | Solar Resource |
| January | 2.28 |
| February | 3.07 |
| March | 4.41 |
| April | 6.08 |
| May | 5.81 |
| June | 6.31 |
| July | 4.79 |
| August | 4.48 |
| September | 4.26 |
| October | 3.53 |
| November | 2.70 |
| December | 2.06 |
| Solar Resource = Kilowatt hours per square meter per day |