Yes, 140 degrees F is the accepted upper limit but it's not "ok" to be at 139F consistently. There is no reason to be that hot if you have proper cooling unless it is 115F outside that day. Always strive for the lowest temp for your batteries in operation, ambient air temp +20F is great and ambient +30F is probably the minimum acceptable temp rise. If it's 75F outside, it's not ok to be at 130F, your goal should be 95F to 105F at most. This is where most people fall into the trap where they see their packs at 110F in April when it's cool out and figure they are ok but then we see battery failures when it gets hot outside. Don't think in terms of what's my battery temp, but what is the temp vs the outside temp today?

Remember damage to your packs is cumulative, the damage you do in April does not show up until July /August when they "suddenly" fail.