| Month | Angstrom-Presott Err (%) | Allen Err (%) | Sabbagh Err (%) |
| January | 4.981 | −4.696 | −14.049 |
| February | −10.066 | −13.944 | −14.802 |
| March | −16.757 | −17.934 | −11.84 |
| April | −23.745 | −21.456 | −5.409 |
| May | −25.766 | −24.973 | −5.040 |
| June | −27.056 | −26.26 | −4.164 |
| July | −23.684 | −22.859 | −7.781 |
| August | −23.314 | −21.857 | −9.331 |
| September | −18.124 | −21.876 | −1.256 |
| October | −11.506 | −16.619 | 0.865 |
| November | −1.523 | −9.839 | −3.638 |
| December | 11.066 | 1.630 | −4.748 |
| Average | −13.791 | −16.724 | −6.766 |