BT BM 83b(50) :בשמשא דתמוז ואב‏ : in the hot sun of Tammuz and Ab
See the entire entry for ˀāḇ n.m. Ab (July/August)

BT BM 83b(50) :והוו מפקי מיניה דיק{י}^ולי^ דתרבא ומותבי בשמשא דתמוז ואב ולא מסרח‏ : they were taking out baskets of fat from him and setting it in the sun of Tammuz and Ab, but it did not putrefy
See the entire entry for tāmūz n.m. Tammuz (June/July)