KAZALCI OKOLJA

Key message
Bad

Temperature in Slovenia is increasing faster than global average. Increase in the annual average temperature is most evident in the last three decades. Warming of the atmosphere will continue according to the climate change projections. The result of warming is an increase in sea level (due to melting of glaciers and thermal expansion), increase in level of the greenhouse gases in the atmosphere (contributes to warming), and many extreme weather and climate events (like floods, droughts, hail and heavy wind), which will influence the quality of our lives.


Charts

Figure PP04-1: Annual average air temperature at selected weather stations in Slovenia in the period 1950-2024
Sources:

Slovenian Environment Agency, 2025 (21/07/2025)

Show data
Kredarica[°C] Ratece[°C] Murska Sobota[°C] Novo mesto[°C] Ljubljana[°C] Portorož[°C]
1950 -1.01 6.75 9.71 10.47 11.14 13.58
1951 -1.41 6.51 10.54 10.69 11.17 13.72
1952 -2.10 5.80 9.40 9.75 10.07 12.87
1953 -1.29 6.31 9.50 9.54 10.33 12.94
1954 -2.65 5.43 8.54 8.91 9.54 12.41
1955 -2.25 5.71 8.77 9.18 9.90 12.56
1956 -2.85 4.79 8.11 8.52 9.20 11.78
1957 -1.31 6.19 9.43 9.87 10.46 13.01
1958 -1.34 6.09 9.80 10.24 10.64 13.17
1959 -1.50 6.49 9.61 9.86 10.64 13.09
1960 -1.99 6.00 9.78 10.00 10.54 12.94
1961 -0.70 6.56 9.91 10.19 10.83 13.28
1962 -2.86 4.82 8.33 8.64 9.29 12.09
1963 -2.24 5.37 8.58 9.14 9.64 12.21
1964 -1.34 5.65 8.89 9.15 9.89 12.63
1965 -2.72 4.99 8.79 8.92 9.39 11.94
1966 -1.98 6.40 10.02 10.15 10.68 13.04
1967 -1.42 6.22 9.87 9.93 10.59 12.84
1968 -2.20 5.72 9.22 9.68 10.12 12.60
1969 -2.26 5.50 8.82 9.07 9.83 12.41
1970 -2.33 5.37 9.11 9.34 10.00 12.41
1971 -1.84 5.82 9.14 9.29 9.93 12.58
1972 -1.95 5.51 9.04 9.44 9.94 12.61
1973 -2.00 5.61 8.94 9.30 9.93 12.55
1974 -2.22 6.19 9.98 10.05 10.67 12.55
1975 -1.40 6.22 9.85 10.12 10.67 13.07
1976 -2.47 5.81 8.95 9.19 9.83 12.44
1977 -1.45 6.10 9.76 10.11 10.58 12.60
1978 -2.20 4.70 8.40 8.63 9.18 11.67
1979 -2.13 5.57 9.39 9.79 10.23 12.52
1980 -2.59 4.96 8.29 8.72 9.28 11.74
1981 -2.29 5.61 9.64 9.76 10.07 12.41
1982 -1.18 6.22 9.69 10.01 10.69 13.00
1983 -0.80 6.32 9.79 10.16 10.51 12.74
1984 -2.55 5.36 9.04 9.30 9.78 12.21
1985 -1.80 5.61 8.50 8.91 9.68 12.22
1986 -1.47 5.69 8.94 9.17 9.89 12.56
1987 -1.62 5.68 8.89 9.44 9.94 12.72
1988 -1.30 6.24 9.71 10.13 10.83 13.26
1989 -0.46 6.45 10.01 10.26 10.76 12.82
1990 -0.76 6.42 10.02 10.43 10.78 13.34
1991 -1.75 5.47 9.18 9.60 10.03 12.58
1992 -0.37 6.89 10.73 10.77 11.16 13.44
1993 -1.20 6.41 9.86 10.32 10.67 13.09
1994 -0.24 7.59 11.13 11.47 11.89 14.27
1995 -1.56 6.38 9.99 10.22 10.80 13.03
1996 -2.09 5.80 8.85 9.14 9.79 12.65
1997 -0.74 6.64 9.48 9.94 10.77 13.37
1998 -1.08 6.71 10.01 10.39 11.03 13.29
1999 -1.07 6.63 10.28 10.48 10.98 13.60
2000 -0.18 7.51 11.46 11.86 12.09 13.95
2001 -1.17 6.99 10.40 10.99 11.46 13.92
2002 -0.34 7.52 11.11 11.34 11.81 13.95
2003 -0.59 6.85 10.54 11.01 11.55 13.78
2004 -1.29 6.11 9.78 10.12 10.65 13.22
2005 -1.85 5.91 9.47 9.81 10.38 12.65
2006 -0.45 6.78 10.15 10.84 11.44 13.78
2007 -0.17 7.44 11.05 11.53 12.21 14.32
2008 -0.59 7.15 11.13 11.21 11.68 14.03
2009 -0.67 7.02 10.70 11.26 11.73 14.13
2010 -1.75 6.46 10.12 10.12 10.66 13.17
2011 0.27 7.49 10.61 11.19 11.72 13.99
2012 -0.22 7.16 11.12 11.41 12.05 14.07
2013 -0.44 7.17 10.91 10.97 11.67 14.02
2014 0.15 7.99 11.91 11.98 12.56 14.92
2015 0.64 7.91 11.45 11.66 12.03 14.38
2016 -0.38 7.50 11.03 11.19 11.68 14.22
2017 -0.21 7.24 10.93 11.51 11.92 14.00
2018 0.14 7.95 11.72 11.85 12.58 14.83
2019 0.24 8.00 11.85 12.03 12.60 14.71
2020 0.52 7.48 11.15 11.73 12.14 14.37
2021 -0.70 6.61 10.72 11.21 11.60 13.85
2022 0.57 7.91 11.54 12.20 12.96 14.86
2023 0.59 8.09 11.82 12.33 12.80 15.00
2024 1.27 8.35 12.39 12.82 12.80 15.29
Figure PP04-2: Linear trend of annual air temperature (in °C/decade) in Slovenia in the period 1950-2022
Sources:

Slovenian Environment Agency, 2023 (21/07/2025)

Show data
Figure PP04-3: 10-year average global temperature
Sources:

World Meteorological Organization, 2025 (21/07/2025)

Show data
Figure PP04-4: Anomaly of global annual temperature relative to the pre-industrial period 1850-1900 based on different datasets
Sources:

World Meteorological Organization, 2025 (21/07/2025)

Figure PP04-5: Timeline of change in average annual temperature in Slovenia over the 21st century
Sources:

Slovenian Environment Agency, 2018 (17/02/2021)

Note:

Comment to Figure PP04-5: The timeline of change in average annual air temperature in Slovenia over the 21st century for three scenarios relative to the reference period 1981-2010. Bold coloured curves show smoothed model median and lighter colours show model spread. Under RCP4.5 the average annual temperature will rise by approximately 2 °C and under RCP8.5 by approximately 4.1 °C by the end of the century. 

Figure PP04-6: Projected change in average annual temperatures in Slovenia and the associated reliability of change for 30-year periods relative to the 1981-2010 average
Sources:

Slovenian Environment Agency, 2018 (17/02/2021)

Figure PP04-7: Observed trend and projected change in average annual temperature in Europe
Sources:

European Environment Agency, 2025 (21/07/2025)


 

 


Methodology

Other sources and literature

  1. Agencija RS za okolje, Naše okolje, mesečni bilten ARSO.
  2. Agencija RS za okolje, 2018. Ocena podnebnih sprememb v Sloveniji do konca 21. stoletja. Ljubljana, november 2018.
  3. Svetovna meteorološka organizacija, 2025. WMO State of the Global Climate 2024.
  4. Evropska agencija za okolje, 2025. Global and European temperatures.
  5. Svetovna meteorološka organizacija, 2023. The Global Climate 2011–2020: A decade of acceleration.
  6. Copernicus Climate Change Service (C3S) in Svetovna meteorološka organizacija, 2025. European State of the Climate 2024.


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