I Should Have Known Better by Jim Diamond first appeared on the Israeli foreign-music chart on 2 Dec 1984, entering at #16. It peaked at #8 on 9 Dec 1984. In total it spent 5 weeks on the chart, last charting on 6 Jan 1985.
| Wk | Date | Pos |
|---|---|---|
| 1 | 2 Dec 1984 | 16 |
| 2 | 9 Dec 1984 | 8 |
| 3 | 16 Dec 1984 | 8 |
| 4 | 30 Dec 1984 | 17 |
| 5 | 6 Jan 1985 | 23 |