On nights with temperatures between 4 and 7[degrees]C and with relative humidities of 90 - 100 percent about 7.5M of ice would form on the surface of the water.
(about 7.5M of ice; would form; L:on the surface of the water; T:On nights with temperatures between 4 and 7[degrees)
about 7.5M of ice
would form
L:on the surface of the water T:On nights with temperatures between 4 and 7[degrees