I carry a can of this when hiking and have been considering taking it on walks in town due to off-leash dogs. It’s citronella and is harmless but dogs really hate the smell of it: https://www.amazon.com/dp/B00MIP6X06
Could be a data quality issue. I see that Accuweather is painting a different story for the entire area.
https://www.accuweather.com/en/us/chandler/85225/air-quality-index/326856
Ugh, I feel your pain! For some reason they will swarm my ankles while everyone else just stands around. I've read that they don't necessarily die off when it get's cold, but they slow down and become less prevalent. Their eggs do not hatch when it is freezing out, but they just lay there in wait!
DynaTrap - This is the unit I purchased.