Rainy day in the first week of July (above)
Each month has it's advantages and drawbacks so fixed rules won't apply.
Moreover EVERY year is unique.
Season of 2017 will be remembered for hot days and very few rains. Season of 2018 turned hot very early (last week of June) with occasional thunderstorms later in season. October greeted off-season travelers with two weeks of splendid weather.
If planning to revisit consider coming in different month. You might not even recognize you favourite spots! Fall has it's beauty very much different from summer's.
High season is in full swing
Photos (below) show snow conditions on the same day but in different years.
North Layla (3991m) in the middle of August
Dry and cool time to enjoy the mountains
Quiet period full of wonders