Good weather is good for weight loss

Natural sunlight affects hormones, metabolisms and immune system. When we have cloudy sky the light still radiates with approximately 4000 lux - on the other hand the best room light does not reach 300 lux. Natural sun light sets Serotonin production in motion and helps us lose pounds.
Serotonin imbalance has been implicated as contributing to increased carbohydrate cravings, binge eating, depression, anxiety, sleep disorders, PMS and a number of other medical conditions.

Serotonin reduces carbohydrate cravings and acts as a mild appetite suppressant.