This is weird with my DexCom 7

Friday thru Sunday at 4:20pm my DexCom 7 worked on a regular 5 min BG reading except with I was trying on clothes it took at 10 min reading but anyway, When I got home for Lubbock at 4: 15pm Dexcom quit reading my BG’s kept telling me do a single blood drop until 9:30pm… It was really weird… After 9:30pm it started working and reading BG every 5 min… I guess DexCom 7 didn’t like Kansas Cold weather…who knows…