Let them know you are entering your “season of risk” so they are on notice to help, Rosenthal said.

If you do not have an official diagnosis of winter SAD but find symptoms have gotten in the way of your daily life, ask your primary-care provider for a referral to a qualified mental health professional, Rohan said.

“I don’t know what it is about seasonal depression that people tend to try to go it alone,” Rohan said. “Depression is a serious mental health issue. We wouldn’t try to figure out and treat our own cardiovascular issue or cancer.”

Antidepressants such as selective serotonin reuptake inhibitors (SSRIs) and Wellbutrin are approved by the Food and Drug Administration for SAD. Reminding your prescribing doctor or psychiatrist may make it easier to adjust medication dosage sooner rather than later.

Alerting a trusted therapist also can help that person to catch early signs of SAD symptoms and provide support. Psychotherapy, especially cognitive behavioral therapy (CBT), has been shown to help with SAD by teaching effective coping skills.

A 2016 randomized controlled trial conducted by Rohan and her colleagues found that people who received CBT therapy for SAD had lower rates of recurrence the following winter compared with those receiving light therapy.

Maintain routines that help mental health

It can be easy to go into hibernation mode when it starts becoming dark early. “It might feel good in the moment but usually serves to maintain depression, if depression is a problem,” Rohan said.

Instead, try to “be really mindful of your routines that serve to maintain your good mental health and try to keep up with those as much as possible,” she said.

Staying sociable, engaging in hobbies and exercising can improve your mood. Preparing early for these activities in the winter, such as having a warm coat to continue your walks or signing up for choir practice, can in turn make it easier to keep these mood-boosting routines.

Reevaluate your outlook on the changing seasons

People with winter SAD have learned negative associations with the signs of autumn and winter.

After preparing for winter, try to ask, “How can I find beauty in this colorful season, autumn, resplendent with the fruits of summer?” Rosenthal said. “You can start really enjoying the colored leaves because they’re not kind of a warning of bad things to come but part of the joy of the season.”