The absence of sun can develops into seasonal affective disorder- depression during winter is common due to this. Weather changes your diet- appetite, hunger , cues, types of food you eat and drink also chnages. Hot weather is related to aggression and higher distress. Temperature changes your happiness, usually due to our evolutionary advantages of being in ideal weather to survive the best way. Recent climate changes shows anxiety will be triggered in high risk of population eg elderly people living by coast. An increase and decrease in consumption of substance and alcohol. Social activities changes the release of hormones will affects your desires to socialize and to be outdoor. Melatonin is hormones released in our brain that regulate this is dependent on sunlight.