patent guy, good guess, fairly accurate, the air in temecula is unique. It worsens as you go north of Murietta. It has a unique microclimate because of the rainbow gap (a sea level notch in the mountains north of pendleton that blows sea air and sea gulls into the valley every day, usually in the afternoon). It is also the reason that they grow grapes here, hot sun, low humidity and cool breezes. The grapes stop about mid city, north of there the temps rise and the breeze lessens.
here is a little info on the micro climate, scroll dow to the climate part.
it’s a narrow swath, on a hot day you gain 1 degree almost every mile as you move north, by the time you hit elsinore is 10 degrees hotter and temec gets mist or fog in the mornings (I actually think the indian name is valley of the mist or something like that), we don’t have much, we get beat up on the boards, we aren’t on the coast, but we get it’s air, so we got that going for us, which is nice.
However, if they build that granite quarry in fallbrook/deluz, it may change the game, the cool wind comes through there almost year round, a quarry on the wind route may blow dust this way. There is so much passion and so many lawsuits on both sides of the quarry argument that I’m not sure what is fact or fiction, it’s ten miles away but there have been numerous experts on both sides claiming everything from nothing will change to visible dust. More than likely it will only affect northern fallbrook (avos) and southern temecula (grapes) if it has an effect, oh and of course me, since that is where I am at and I am the only one allowed to screw up the air with my cigars.