The South Africa captain has previously had loan spells at Reading, Doncaster Rovers and Preston North End.
Khumalo was not in the U's squad for Saturday's League One game at Crawley Town, as Colchester are still waiting for international clearance.
The 28-year-old scored the winner for Bafana Bafana in their win over France in the 2010 World Cup finals.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Liverpool | 5 | 4 | 0 | 1 | 10 | 1 | 9 | 12 |
| 2 | Manchester CityMan City | 4 | 4 | 0 | 0 | 11 | 3 | 8 | 12 |
| 3 | Aston Villa | 5 | 4 | 0 | 1 | 10 | 7 | 3 | 12 |
| 4 | Chelsea | 5 | 3 | 1 | 1 | 11 | 5 | 6 | 10 |
| 5 | Arsenal | 4 | 3 | 1 | 0 | 6 | 1 | 5 | 10 |
| 6 | Newcastle UnitedNewcastle | 5 | 3 | 1 | 1 | 7 | 6 | 1 | 10 |
| 7 | Brighton & Hove AlbionBrighton | 4 | 2 | 2 | 0 | 6 | 2 | 4 | 8 |
| 8 | Fulham | 5 | 2 | 2 | 1 | 7 | 5 | 2 | 8 |
| 9 | Nottingham ForestNott'm Forest | 4 | 2 | 2 | 0 | 4 | 2 | 2 | 8 |
| 10 | Tottenham HotspurSpurs | 5 | 2 | 1 | 2 | 9 | 5 | 4 | 7 |
| 11 | Manchester UnitedMan Utd | 5 | 2 | 1 | 2 | 5 | 5 | 0 | 7 |
| 12 | Brentford | 5 | 2 | 0 | 3 | 7 | 9 | -2 | 6 |
| 13 | Bournemouth | 5 | 1 | 2 | 2 | 5 | 8 | -3 | 5 |
| 14 | West Ham UnitedWest Ham | 5 | 1 | 1 | 3 | 5 | 9 | -4 | 4 |
| 15 | Leicester CityLeicester | 5 | 0 | 3 | 2 | 6 | 8 | -2 | 3 |
| 16 | Crystal Palace | 5 | 0 | 3 | 2 | 4 | 7 | -3 | 3 |
| 17 | Ipswich TownIpswich | 5 | 0 | 3 | 2 | 3 | 8 | -5 | 3 |
| 18 | Southampton | 5 | 0 | 1 | 4 | 2 | 9 | -7 | 1 |
| 19 | Wolverhampton WanderersWolves | 5 | 0 | 1 | 4 | 5 | 14 | -9 | 1 |
| 20 | Everton | 5 | 0 | 1 | 4 | 5 | 14 | -9 | 1 |
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