Precipitation is highly variable in space and time, even more than temperature (storms and hail). In the last two decades, Slovenia is observing catastrophic droughts and abundant precipitation resulting in floods, sometimes drought and floods occur even within the same year. The maximum snow cover depth and the depth of fresh snow decreased in the period 1961-2011

Concentrations of sulphur dioxide in ambient air are no longer harmful for human health. Also, the critical annual value for the protection of vegetation is no longer exceeded. The improvement of the situation in the last decade is a result of the use of low-sulphur fuels in industry and the operation of desulphurisation facilities in thermal power plants.

In recent years, ambient concentrations of ozone in urban and suburban areas has been above target value for human health protection. Long-term targets have been exceeded at almost all measuring sites. Due to fewer hot sunny summer seasons, the information threshold levels have been exceeded only in the Primorska region and in some places at higher altitudes - Otlica. However, also some exceedances have been recorded at measuring sites that are not directly exposed to traffic.