1945
- April 1
- Sumner Borough, McCormacks Bay and Hillsborough join City.
- May 8
- V.E. (Victory in Europe) day celebrations.
- May 19
- Severe flooding throughout city.
- July 13
- Severe gales with gusts to 145 kilometres per hour (90 miles per hour).
- July 14
- Record snowfall 280mm (11 inches) over most of city.
- July 18
- Christchurch’s lowest recorded temperature -7.1 deg C. Note that this is air temperature which is recorded above ground level. Frost readings are taken on the ground and can be several degrees colder than the air temperature. Record frost was in 1872.
- August 8
- More flooding in City, worst at Shirley, Radley and Sumner.
- August 15
- V.J. (Victory over Japan) day celebrations.
- September 26
- Charles Hazlett Upham (born Christchurch 1908) awarded second V.C. for gallantry in the Western Desert, 1942. He won his previous award in Crete during May 1941.
- December 15
- Railway line to Picton completed.