Instrument meteorological conditions (IMC) exist when an aircraft is in weather conditions that are not within the VFR visibility and cloud clearance requirements.
This means that you are in IMC if:
• You are inside of a cloud
• The visibility is too low
• You are too close to a cloud
When you are in IMC you need to be flying an instrument flight plan. Flying VFR into IMC is very dangerous and there are a multitude of accidents that occur this way. Don’t be a statistic! Stay away from the clouds.
In fact, I recommend having personal minimums for visibility and cloud clearance that are even more restrictive than the rules.