Went out tonight at -6* F. Flew great, batteries held steady at 19* C for the entire flight. Only a 2-3 minute loss in flight time over any other warmer flights.
...it's moisture in the air you need to be aware of, not just the C/F gauge.
Not to be outdone....
This morning it was -33C (-27F). I made a 23 minute flight covering 5.4Km or 3.37 miles. I took off with a battery temperature of 22.2C. After 15 minutes the battery temps had risen to 25.3C.
I live in the country. I have a heated garage with a large picture window overlooking a field so I can fly in the warm and watch out the window. (I doubt my iPad or my bare fingers would have lasted 23 minutes at -33C )
So as LBC970 says.. You can fly in the cold..
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