Synonyms for «unpredictable times»

The phrase "unpredictable times" means that the future is uncertain and it is difficult to know what will happen next. Full definition

Synonyms for individual words can be found below.

Be actively visible at unpredictable times during the school day. (intro.professionallearningmaps.com)
Does that mean there are some days where ocean kayaking is possible, or is the ocean too unpredictable this time of year for such a long trip? (KauaiExplorer.com)
It's a natural reaction, especially in such unpredictable times. (howtotoken.com)
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