I have had my share of the depressed mood during the rainy season. I think during the rainsy season for some reason there is change of the positive mood. I can tell you that it can be pretty depressing overall as well.
If you feel depressed in rainy season, then probably you are feeling bad by sitting at home. My recommendation is chat with other friends in hotel so no boring as you see hotels had lot of people in rainy season for drinking Coffee.