Unknown. Seems unlikely.
Your young mangos will be frozen to death at temperatures way above 25-degreesF.! Trees with trunks a foot in diameter can survive an hour or so of that, with severe branch damage.
Hmm.. not sure if its just the coastal microclimate I've been growing mangos in or not, or maybe it's the varieties I have been growing (seedling Kents and Ataulfos), but the only time I had all my seedling mangos freeze to the ground was when it got down to 19F a few years ago. I've had multiple 6-inch seedlings endure 23 degree outside temps with just tip burn and some half-burnt leaves. Although maybe two degrees colder and they would've burnt down completely.. Every winter we get about 10-15 frosts (usually mild and pretty brief, maybe less than 4 hours below freezing for each frost, and the coldest ones only got to 27F), but had absolutely no observable damage on any mango the past couple years.. including the first cold front of the season where it dropped from about 80F to 40F in 5 hours. I found it interesting that many seedling lychees and carambola were leaf-damaged in that event, but none of the seedling longans or mangos were affected. Even the seedling cherimoya/atemoyas had leaf burn. Real strange..
Perhaps grafted mangos react a bit differently to cold temps than seedlings..