There is a consensus among ghost hunters that under some weather conditions more paranormal activity occurs. Conditions that seem to help these paranormal events are ones that influence the earth's magnetic field including solar flares, geomagnetic storms and full moons. It is believed that ghosts use electrical energy in some way.
During paranormal investigations, equipment and batteries are sometimes drained of energy and ghosts are thought to be the reason for that. During the conditions that charge up the earth's electromagnetic field, it is thought that the ghost can tap into the extra energy and that is why there are more paranormal events at those times. Ghost hunters use paranormal investigators equipment such as their computers, devices and the calendar to check conditions.
Extra solar activity in the form of solar flares affects the earth's geomagnetic field. Some great paranormal evidence has been collected during times when there is solar activity such as mega flares and geomagnetic storms. It is unknown why this happens. Serious ghost hunters will watch for high-level periods of solar activity and try to plan investigations during those times. Conditions where either an M Class flare, X Class flare or a Mega Flare has occurred are ripe for ghost investigations. When the geomagnetic field either indicates an unsettled or storm condition that is another good time for paranormal investigations.
Lunar phases also affect the earth's geomagnetic field. The earth's electromagnetic field is affected when the moon is closer such as when it is full. People and paranormal activity are both influenced when the gravitational force is affected during a full moon. More activity seems to happen with the full moon by some paranormal investigators while other investigators do not notice this fluctuation.
Thunderstorms and lightning are also thought to be good for having success with a ghost hunt. It is believed that during a thunderstorm a higher vibration frequency is reached by both the living and the not so living, which can make the odds a bit better for somebody to spot a ghost. Is it any wonder that thunderstorms seem like such a likely setting for a scary event in a movie or a book?