Yeast frementation temp question
If I was to use White Labs California Ale yeast and it recommends that it stay at a temp range of 66-70 degrees is that the temp of the wort during fermentation or the air temp?
If it's the temp of the wort then I realize I'd have to keep the air temp at around 63 degrees (being the fermentation temps are 5+ degrees warmer) which I am not prepared to do currently.
Also it's amazing to me that something like Notty and Safale dry yeast have such a wide range acceptable temperatures but the liquid yest is such a small window!!!!
Primary 1: Winter Tropics Pale Ale
Primary 2: Appy IPA
Primary 3: Truly Triple Hopped IPA
Secondary 1: Air
Secondary 2: Air
Bottled: Edworts IPA, Nierra Sevada, Stork Blue Celebration Ale
On Deck: Maroon Effect Amber, Blonde, IPA, APA