The car is perfectly safe and can be driven in all weather, the Japanese have pretty severe weather as well.! Just make sure you have suitable tyres for the conditions and terrain.
Perhaps some tuition for the driver, just to build confidence?
If it were me, I would go with an SUV (NX or RX) rather than a low slung saloon...
By the way your location in you profile is Berkshire, is there a Berkshire in New Zealand?