We seem to get the consistent haze when the winds are light and south easterly, even in the summer. The winds pick up westerly out of comfortable crosswind limits so we are still grounded, at least where I fly from. That's aviation for you. Did get to fly yesterday in spite of the viz. I found when I used to fly from LPL, often it was fogged in, localized around the airfield, but once clear of the area it was so different. Very frustrating, but you will get there in the end Maz. I don't think I will ever understand the weather fully.