What you write depends on what you want to say, and who is saying it.
If your emphasis is on the second part, you don't need to explain the first part. You can use something like:
- "Really? Today the roses are blue."
- "Who knew that Valentine roses would be blue this year."
- "ugg. Another week of wearing a mask."
If you want to emphasize that there is a change from a prior state, the prior state must be clear. If it can be clear from the earlier setting, it might not take much.
- "Why is it raining in LA?"
- "I came to Seattle for the gloom, but I get nothing but sunshine."
If there is something about the character you are trying to expose, it may take a little more work:
- John looked in the mirror and positioned the grey hairs deeper into his luxurious waves. A few insolent strands flew up again, but small drops of hair gel locked them in place. John enjoyed his appearance -- the way his hair framed his black, carbon fiber glasses and the sharp outline his sculpted beard gave his otherwise soft chin. With his appearance optimized, he grunted as he pulled a face mask over his head. Ruffled by the elastic, his hair locked into dishevelment. His beard and chin were both obscured, visible only in his self-image. "Everyone has to sacrifice something these days," he sighed to no one as he turned off light in the emergency hospital's single break room and prepared to enter the triage hall.
If what you place in a character's mouth doesn't feel right to the character, just let them say it the way the want to. If you are saying more than you need, say less. If questions remain, that is good if the questions drive the reader's curiosity for what happens next. Remember that by inducing questions you have implicitly promised to answer them while they are still important. If the questions aren't important to move the story, answer them before they are asked through setting, character, or backstory. Confirmation builds belief. Unanswered questions create disappointed readers.