Yes. Contrary to popular belief, the playing surface does not change the WBGT to any appreciable degree.

Sources: Grundstein A, Cooper E. Comparison of WBGTs over Different Surfaces within an Athletic Complex. Medicina (Kaunas). 2020 Jun 25;56(6):313. doi: 10.3390/medicina56060313. PMID: 32630486; PMCID: PMC7353887.

Cheuvront SN, Caruso EM, Heavens KR, Karis AJ, Santee WR, Troyanos C, D’Hemecourt P. Effect of WBGT Index Measurement Location on Heat Stress Category Classification. Med Sci Sports Exerc. 2015 Sep;47(9):1958-64. doi: 10.1249/MSS.0000000000000624. PMID: 25628176.