Depends. Do you mean to say "Foresee" or do you mean "expect"?
"One does not foresee hail in July" might require a time frame of some sort; ever, over the next 2 years, this April, etc. "One does not expect hail in July" just means that it is, to the speaker at least, an unusual, but not unheard of, event.
Foresight does not restrict to time frame. One may claim to not foresee any difficulties in an action given current and likely future conditions. The time frame may be considered "at any time", although it's implied that a change in conditions would change foresight.
One does not foresee hail in July because the conditions in July of any year are not conducive to hail, and hail in practice does not come in July. Such a statement implies conditions--in this case, the condition of being during the portion of the year known as July.