This sounds like a riddle! Here are a few possibilities, playing on math concepts:

* "I'm totally frost-bitten, but I'm still feeling pretty acute!" (Acute angles are less than 90 degrees)

* "This weather has really been a real number!" (Playing on "real numbers" in math)

* "I'm so cold, I feel like a negative exponent!" (Negative exponents make numbers smaller)

Let me know if you'd like me to try another one!