well... on average, the human body temperature is somewhere between 36.5°C-37°C, or even up t 37.5°C for newborn babies / infants / toddlers.
Your body temperature is a bit lower than normal, but not into "mild hypothermia" low, that's below 35°C. Probably it's a slight adaptation to the cold; it's easier to maintain a steady 36°C than 36.7°C since less calories are consumed. Still, if you notice any other symptoms related or not to hypothermia you should see a doctor for a more in-depth examination (especially the thyroid gland).
My first question is what kind of thermometer did you use? The digital ones are known to sometimes report lower temperatures erroneously. Use a mercury-based one if you haven't already.