"variable conditions" is correct and usable in written English.
You can use it when you want to refer to different conditions or situations that can change. For example, "These variable conditions can make it difficult to make a long-term forecast."
The circuit typically passes over New England's relatively diminutive mountains and variable conditions in favor of the sunny, chalky Rockies.
"We can't give specific details for counties until nearer the time, and different areas are set to see variable conditions".
A shift toward natural cooling will mean relying on humans' well-proven capacity to adapt to variable conditions.
It acknowledges that those with mental health conditions, long-term variable conditions and learning difficulties are not currently well assessed.
The Darling is the longest river on the driest inhabited continent – prone to harsh and variable conditions.
It is possible that the complexity of the neocortex is a requirement for the discrimination of faces under variable conditions.
I have corrected and smoothed it and almost tested it enough to be slightly confident that it will be consistent under variable conditions.
Paul Ricard's variable sprinkler system allowed Pirelli to test with different amounts of water on the track in order to simulate variable conditions.
Great Horned Owls have evolved over millions of years to cope with variable conditions, including harsh weather.
But farmers reported that such varieties were unsuited for the variable conditions they cultivated in, from undulating land to increasingly unpredictable weather.
The route to the summit of Everest changes slightly each year, depending on variable conditions, like the snowpack or snow slides.
