The charges do not have a temperature. It is the their smashing into air that causes the air to heat up. You could heat air up waaaaayyyy higher with electricity, many orders of magnitude hotter. At least onto the 100 millions of Kelvin. My understanding of physics stops somewhere around that point, but I do not see a reason why that should be the limit.

As a side note, the less you have of something, the more irrelevant temperature becomes. You get hit by atoms, electrons, nuclei and other particles that have temperatures well into the billions(!) of degrees/Kelvin.