Does hot weather affect battery performance?
I have four 12 volt lead acid deep cycle batteries in a vented metal box on the tongue of my Toy Hauler. We recently have gone through several days of 100 degree temps. Made me start thinking about...
Forum Discussion
mr_andyj wrote:
Extreme heat speeds up the chemical reaction inside a battery and causes an increase in the self-discharge and plate corrosion. This leads to sulfation which can cause irreparable damage to the battery.
For each 10°F rise in temperature, the life of a sealed lead acid battery is cut in half. Therefore, if a battery in a stationary position that should last for 4 years at normal temps, would last 2 years if exposed 92°F and even less if exposed to typical desert temps of 106°F.
And of course, this is talking about long term effects.
I help out our Kuwait office and 7 months of the year triple digit temps are normal. Mid summer 120-125F (actual temp not feels like) are not uncommon. The guys I work with tell me 2yrs out of a starting battery is doing good.
Assuming the OP is talking about the heat wave in the NW that is likely to last only a week or so, it's unlikely to have a measurable effect.
