In the 24 hours up to 7am this morning 25.6mm of rain fell in the town.
Meteorologist Roger Brugge of the University of Reading says Maidenhead has now had 45.8mm of precipitation already this month, which is more than the town usually gets through the entire month of February.
Dr Brugge said: "With 311.1 mm of rain falling so far this winter, it has been the wettest winter since 1989/90, when 327 mm fell. These two winters are the two wettest in the Maidenhead rainfall record, which stretches back to 1859.
"With more heavy rain expected during the next five days, it is quite likely that the winter total of 1989/90 will be passed soon."
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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.