degrees -10 -20 -30 - 40 0 celsius number lettering on icy glass covered with ice and frost. the concept of extreme cold weather

abstract background blue bright celsius climate closeup cold concept cool covered crystal degree degrees environment equipment extreme fahrenheit forecast freeze frost frosty frozen glass ice icy indicator instrument lettering low measure measurement meteorology minus nature number outdoor outside pattern scale season sign snow snowflake symbol temperature texture textured thermometer tool transparent weather window winter zero