Many researchers feel that atmospheric and planetary conditions have an influence on nonphysical phenomena. For instance changes in geomagnetic activity, solar activity and weather may influence the frequency and quality of hauntings. Observances of temperature, wind and humidity can all aid in helping to determine what is credible evidence collected during an investigations. During thunderstorms the atmosphere normally has small electricity charged gases called ions. Those ions have net negative charge in the upper reaches of the atmosphere and because opposites attract those negative charges induce positive charges in which causes lighting during a storm.
It is theorized that paranormal activity increases due to the need of energy to manifest and with these increased ions in the atmosphere. However, often weather conditions such as wind, rain, cold can causes noises such as drips, creaks, groans, rattling noises etc. People tend to forget that buildings, especially older ones, can contract and expand with the weather conditions thus causing some rather strange and unsettling noises.
Cold spots are another common phenomenon in buildings that are thought to be haunted. People describe sudden drops in temperature or localized cold areas in an otherwise warm room. Often, investigators can trace the cold spot to a specific source, like a drafty window or a chimney. The sensation of a lower temperature can also come from reduced humidity.