adjective
inclement
in-KLEM-uhnt/ɪnˈklemənt/
Unpleasantly severe, especially of weather.
The inclement weather turns the man's umbrella inside out as rain lashes him.

Etymology
“Not mild” gives the idea of harshness or lack of mercy. Applied to weather, that harshness means stormy or otherwise severe, unpleasant conditions.
In context
ships is designed to be effortless to accomplish this key design goal viking created the hangar an industry first the enclosed marina permits guests to embark watercraft sheltered from the inclement weather
More examples
- Road crews work through inclement weather to restore power.
- Pack waterproof boots in case you encounter inclement conditions.
- The ferry may stop running if the weather turns inclement.
Forms
inclement
inclemency noun — Harshness or severity, especially of weather.
Similar words
- harsh
- Describes unpleasant roughness or severity beyond weather alone.
- stormy
- Specifically suggests storms, rather than unpleasant weather in general.