Three more pitch inspections are planned at 1000 GMT.
Ten games in the Scottish Premier League and Scottish Football League were called off on Saturday because of flooding or frozen pitches.
No pitch inspection is planned at Rugby Park, where Kilmarnock host Falkirk.
But inspections are being held ahead of the Edinburgh City v Montrose, Forfar Athletic v St Johnstone and Inverness Caledonian Thistle v Motherwell ties.
MONDAY 18 JANUARY
SCOTTISH CUP FOURTH ROUND
Albion Rovers v Stirling Albion - match on
Ayr United v Brechin City - match on
Edinburgh City v Montrose -pitch inspection Monday 1000
Forfar Athletic v St Johnstone -pitch inspection Monday 1000
Inverness Caledonian Thistle v Motherwell - pitch inspection Monday 1000
Kilmarnock v Falkirk - no pitch inspection
Ross County v Inverurie Loco Works -match on
Source: BBC Sport
Source: BBC Sport