Precipitation is highly variable in space and time, even more than temperature, and extreme precipitation events (storms with torrential rain, hail) and drought are of particular concern. In the last two decades, Slovenia  has been observing extreme droughts and abundant precipitation resulting in floods. Drought and floods can occur even within the same year. The maximum snow cover depth and the depth of fresh snow decreased in the period 1950–2022.

Temperature observations show increasing trend of maximum and minimum absolute temperature in between 1961 and 2022, reflecting a global warming. Number of hot days is increasing, including the frequency of extreme hot days with daily maximum temperature above 35 °C. In the summer of 2013, the highest temperature so far was measured in Slovenia, and local temperature records were observed at many meteorological stations. A record number of hot days was observed in 2022. Number of days with temperature below zero show a decline.

In 2023, around 182 million pieces of plastic carrier bags were placed on the Slovenian market, of which 99% were those with a wall thickness of less than 50 microns (light plastic carrier bags). In Slovenia, the consumption of lightweight plastic carrier bags amounted to 85 bags per capita in 2023 In the same year, 145.9 million pieces of single-use food containers made wholly or partly of plastic and 174.4 million pieces of single-use beverage cups made wholly or partly of plastic were placed on the Slovenian market.

In the period 2003-2024, the highest exposure to ozone concentrations were detected in the Primorska region in summer where air quality measuring stations in Koper and Nova Gorica Grčna detected highest ozone concentrations in ambient air. There are some differences from year to year in a level of ozone exposure due to meteorological conditions in the warm half of the year and other regional characteristics.

The total number of varieties listed in the National List of Varieties for cereals, corn, and potatoes has decreased since 2011, while the number of oilseed varieties has steadily increased over the same period, mainly due to domestic varieties registered as conservation varieties and the registration of a larger number of foreign sunflower hybrids. In other crops the number has remained at the similar level. For rye and oats, the proportion of the five most common varieties is 100%.