Okay, it's 18 degrees F here currently. However, with wind chilling at 10mph, it is -20. This is in eastern Washington State in the US, next to the Idaho panhandle.
My husband's grandfather was a Commander in the Navy and my husband inherited a lot of his barometric equipment, temp equipment and navigation (using the stars). I love it! I watch the barometer/temp/humidity thing all day long. I know it's accurate, b/c its information matches what my satellite says.
Tallgirl.