Yes, the ‘’sweet spot’’ for best performance is around 20 degrees Celsius, but the battery has been oversized to account for temperature variations. Battery capacity is reduced at colder temperatures, but there should be enough headroom (extra capacity) for normal operation at temperatures to around -10 °C.
At higher temperatures, aging rate is increased. Even at 50 degrees Celsius, however, battery service life should still be at least 1 year .