Synonym for not-suited
You can say "tropical climate is inapt for huskies".
Inapt: not suitable for the situation:
https://dictionary.cambridge.org/dictionary/english/inapt
In this context you can replace 'not suited' by:1. unsuitable: not fitting or appropriate 2. unfit: something/someone is not of the desired quality or doesn't suit a chosen purpose 3. ill suited: inappropriate