The 23-year-old, who joined Barnsley earlier this summer from Colchester United, had turned down a permanent move to the Posh earlier in the summer.
The West Ham United academy product made 51 goals for Colchester last season, scoring 14 goals in the process.
Moncur joins Peterborough, currently seventh in the League One table, having made two appearances for the Tykes.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Birmingham CityBirmingham | 23 | 16 | 5 | 2 | 41 | 17 | 24 | 53 |
| 2 | Wycombe WanderersWycombe | 25 | 15 | 6 | 4 | 50 | 27 | 23 | 51 |
| 3 | Wrexham | 25 | 15 | 6 | 4 | 37 | 18 | 19 | 51 |
| 4 | Huddersfield TownHuddersfield | 24 | 14 | 5 | 5 | 37 | 19 | 18 | 47 |
| 5 | Barnsley | 25 | 12 | 6 | 7 | 39 | 33 | 6 | 42 |
| 6 | Reading | 24 | 12 | 5 | 7 | 39 | 33 | 6 | 41 |
| 7 | Stockport CountyStockport | 25 | 10 | 8 | 7 | 37 | 27 | 10 | 38 |
| 8 | Leyton Orient | 24 | 11 | 4 | 9 | 32 | 22 | 10 | 37 |
| 9 | Mansfield TownMansfield | 23 | 11 | 4 | 8 | 31 | 26 | 5 | 37 |
| 10 | Bolton WanderersBolton | 23 | 11 | 4 | 8 | 35 | 34 | 1 | 37 |
| 11 | Charlton AthleticCharlton | 23 | 9 | 7 | 7 | 27 | 21 | 6 | 34 |
| 12 | Lincoln CityLincoln | 25 | 8 | 8 | 9 | 28 | 30 | -2 | 32 |
| 13 | Stevenage | 23 | 8 | 7 | 8 | 18 | 20 | -2 | 31 |
| 14 | Exeter CityExeter | 24 | 9 | 4 | 11 | 28 | 31 | -3 | 31 |
| 15 | Blackpool | 24 | 7 | 9 | 8 | 32 | 35 | -3 | 30 |
| 16 | Rotherham UnitedRotherham | 23 | 7 | 7 | 9 | 21 | 23 | -2 | 28 |
| 17 | Wigan AthleticWigan | 23 | 7 | 6 | 10 | 21 | 23 | -2 | 27 |
| 18 | Northampton TownNorthampton | 25 | 6 | 8 | 11 | 24 | 39 | -15 | 26 |
| 19 | Peterborough UnitedPeterborough | 24 | 7 | 4 | 13 | 41 | 46 | -5 | 25 |
| 20 | Bristol Rovers | 24 | 7 | 4 | 13 | 22 | 38 | -16 | 25 |
| 21 | Crawley TownCrawley | 23 | 5 | 5 | 13 | 24 | 43 | -19 | 20 |
| 22 | Shrewsbury TownShrewsbury | 24 | 4 | 5 | 15 | 24 | 44 | -20 | 17 |
| 23 | Cambridge UnitedCambridge | 24 | 4 | 5 | 15 | 22 | 43 | -21 | 17 |
| 24 | Burton Albion | 24 | 2 | 8 | 14 | 20 | 38 | -18 | 14 |
| > League One Full Table | |||||||||
