Oslo in Norway had massive problems due to the cold affecting the amount of charge the buses would hold as well as the charge speed leaving them unable to recharge them fully over night.
If you fully charge a battery, freeze it, then warm it back up, it will still be close to fully charged.
a spokesperson called the allegations “an extreme exaggeration… We cancelled, on average, between 50 and 100 departures, out of more than 4,000 daily departures, for a few days.”
The company did however admit they had a few “challenges with the range of the buses being shorter in cold weather."
"We solved this by changing the charging shifts. And also by fixing the charging infrastructure."
Ruter [the bus operating company] claims the issues have since been fixed and the fleet of electric buses continues to run as usual.
https://www.nrk.no/stor-oslo/kaller-inn-byrad-i-oslo-pa-grun....
Reached 1000 cancelations at the worst in a single day it seems.
They managed to resume traffic by using emergency diesel replacement buses.