Undersoil heating means the match was never in doubt, while the stadium and surrounding car parks have also been cleared of snow and ice.
But Boro have warned that many pavements surrounding the stadium are coverde in ice, so supporters should expect delays and take extra care.
The Championship game between Preston North End and Barnsley was called off, with police deciding that the area around Deepdale was unsafe for supporters.
No other Championship games had been called off as of 2.30pm, although Bristol Rovers v Walsall, Carlisle United v Huddersfield Town and Oldham Athletic v Tranmere Rovers had been postponed in League One.
Four games in League Two were called off: Notts County v Grimsby Town, Rotherham United v Darlington, Port Vale v Vurton Albion and Bury v Bradford City.