Tunraj Uppal, of St Leonard's Road, is accused of conspiring to supply class A and B drugs in Maidenhead between May 2013 and March.
The 22-year-old is also accused of possessing money earned through drug dealing in Colnbrook in December and for breaking bail conditions in July.
He has been remanded on conditional bail to appear at Reading Crown Court on Friday, August 1.
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.