Sounds about the temperature where a Swede would start complaining it's a cold winter this year, and a Finn would start contemplating putting a coat on...You don't need to give the units when you say -40°. Celsius and Fahrenheit, it's the same. -40°F=-40°C.
And if any of you think you'll be snarky and say "but Kent, what about Kelvin?". There are no negative Kelvin temperatures. 0° Kelvin is the point where atoms stop moving altogether.