Weather widget temperature never lower than 0

For the past few days I've been surprised that my Garmin 5 Plus was reporting a minimum forecast temperature of exactly 0, and at times reporting a current temperature of 0, when other sources seemed to show lower values (into the negative).

Changed it from Celsius to Fahrenheit, and suddenly the minimum drops to below freezing - currently showing 29F which is -1 or -2C. Turn it back to Celsius, and we're back to 0C.

Anyone else in a cold enough area able to see this? Would be interesting to see what happens if it goes below 0F too.
  • I remember seeing -15 C last friday and -18 C on Christmas eve in the current temperature section of the Weather widget (which was about correct) and -5 C on Christmas morning (when actual was around -6 on the window) here in Finland at Joensuu area. Now, it is showing 0 C in Helsinki which is also correct.