My Wife was baptized outside in October in a lake in Massachusetts when it was about 40 degrees out. BUT couldn't join a Baptist Church, because an Assembly of God pastor had performed it.
This is quite unfortunate. Baptism is about identifying oneself with Christ, repenting of sins and making Christ the Lord of our life. It is not about identifying with a denomination. As Paul points out in 1 Corinthians 1
1 Corinthians 1:12–15 (ESV): What I mean is that each one of you says, “I follow Paul,” or “I follow Apollos,” or “I follow Cephas,” or “I follow Christ.” 13 Is Christ divided? Was Paul crucified for you? Or were you baptized in the name of Paul? 14 I thank God that I baptized none of you except Crispus and Gaius, 15 so that no one may say that you were baptized in my name.
Baptism is supposed to unify us since we are all baptized into one name. Those who see baptism as a cause for division based on who is doing the baptizing have not only misunderstood it, but are in danger of dividing the body of Christ. Paul compares this kind of division as destroying the Temple of God. A very dangerous proposition!
1 Corinthians 3:16–17 (ESV): Do you not know that you are God’s temple and that God’s Spirit dwells in you? 17 If anyone destroys God’s temple, God will destroy him. For God’s temple is holy, and you are that temple.