chennu wrote:agree, but with the lack of any hard info from Nissan, i need to rely on my own measurements. hence my question! I really would like to understand the relationship between ambient temperature and battery pack temperature and any tool which allows me to do that while the summer lasts! if i cannot find anything, then the Leaf is going to be garaged until temperature comes down to the 70s!
You are totally overthinking this.
Remember that as a general rule of thumb, for every 10C rise in temperature, the rate of capacity degradation over a time period will double.
3 days of 100F (38C) max temps instead of normal 80F (27C) temps might age your pack an extra 3-4 days than it would have otherwise otherwise. Big deal.
If you're really worried about it, park the car outside the garage over-night where it will generally be cooler by as much as 10F. Do this for a couple weeks and you'll have made up the high temps that you're currently experiencing (which are nothing compared to the 105-115F max 90F min temps Phoenix has seen so far for the month of August). Portland is on average 30F cooler than Phoenix so far this month - 100F vs 70F.