Genesis 8:5
And the waters decreased continually until the tenth month: in the tenth month, on the first day of the month, were the tops of the mountains seen.
And the waters decreased continually until the tenth month,.... That is, from the seventeenth of the seventh month, to the first of the tenth month, a space of two months and thirteen days, and being summer time, through the heat of the sun, they decreased apace:
in the tenth month, on the first day of the month, were the tops of the mountains seen; not the tenth month of the flood, but of the year; the month Tammuz, as the Targum of Jonathan, and answers to part of June, and part of July; and the first day of this month, according to Bishop Usher {h}, was Sunday the nineteenth of July: but according to Jarchi, whom Dr. Lightfoot {i} follows, this was the month Ab, which answers to July and August, the tenth from Marchesvan, when the rain began.
{h} Ut supra. (Annales Vet. Test. p. 4.)
{i} Ut supra. (Works, vol 1. p. 6.)