Gaining weight instead of losing weight?

I''ve been running twenty minutes everyday. For the past week, I gained 9 pounds. Not only that. I haven''t ate too much to gain the weight. Neither have I ate too little. Could the cold weather be causing my body to signal it to store fat?

Special Foods to Eat to Lose Weight

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I would encourage to run a little bit longer. Push yourself. Not too hard, though. Also include other activities in your routine, such as push ups, sit ups, crunches, bicycle kicks. Do not forget to stretch!(:
Also, muscle weighs more than fat. Your body is getting used to your new routine, so it''s craving more food. Eat healthy, protein, like protein shakes/bars. You could be losing fat and gaining muscle. Hope I helped(:

• 20 minutes is nothing and you''re proably running too slow. Kick it up a notch now that you are better conditioned and eat more protein.
• Running twenty minutes everyday should be enough to losing weight if you are not eating excessive.
  
  Reason can be about health-care i think you should visit a specialist.
• I actually only work out in the winter u know after eating all that food from the holidays lol and I lose weight just honestly it doesn''t matter if u eat a little Its all about what you you should stick with chicken or tuna very good for u but also take vitamins they will really help hope this helps.
• 20 minutes isn''t enough, you must excerise more. Also, it could depend on what you are eating!