Ph swing...

[southern186]

I have a question if none has noticed or had any input on this.. my ph stays pretty consistent at a 8.3-8.36 with a fresh air supply to co2 scrubber then to skimmer with dosing kalkwasser at night. Tank is about nine months old and has been running since the beginning of spring or so.. that being said the humidity and temp outside stays pretty high as I live in south ms. First cold front came threw this morning since I started the tank and my ph jumped up to 8.57 and has been consistent all day. Would the temp and humidity level outside have this dramatic of an effect on my ph??

 

[Ocelaris]

Colder air does have more oxygen, it's a denser air, so my assumption is that it correlates. If I leave the windows open I get a much higher pH as well. Just some observations, I don't know the exact science behind it.