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[PP11] Heating and cooling degree days
State

Key message
Neutral

Comparison of periods 1961-1990 and 1991-2020 on the chosen representative stations around Slovenia shows decrease of heating degree days by around 10 % and multiple increase of cooling degree days. With projected continuous temperature raise until the end of 21st century, those trends are expected to continue. Thus, in Slovenia, energy demand for cooling will increase in the warmer period of the year, while the energy demand for heating will decrease in colder period of the year. Same trend is projected for Europe in general.

Charts

Figure PP11-1: Annual heating degree days, Slovenia, 1961-2020
Sources:

Slovenian Environment Agency, 2021 (20. 04. 2021)

Show data
measuring point Unit 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Kredarica Kday 7682 7935 8245 7626 8101 7883 8035 7716 8065 8225 7943 7685 8095 7829 7958 7836 7947 8066 7960 8208 7866 8017 7514 7985 7998 7689 7920 7552 7359 7361 7991 7614 7243 7677 7498 7773 7766 7502 7668 7475 7404 7359 7584 7621 7670 7815 6878 7609 7682 7670 7580 7342 7484 7105 7433 7002 7239 7371 7214 6978
Rateče Kday 4363 4809 5148 4552 4960 4682 4636 4490 4880 5039 4821 4722 4948 4619 4705 4603 4641 4979 5107 5022 4956 4785 4248 4917 4839 4627 5039 4299 4464 4383 4959 4397 4348 4447 4321 4655 4522 4236 4565 4157 3972 4296 4161 4658 4506 4765 3669 4417 4398 4288 4237 4109 4407 4005 3813 4156 4071 4219 4091 3940
Murska Sobota Kday 2937 3527 4044 3686 3588 3349 3204 3311 3637 3682 3446 3533 3800 3456 3295 3653 3229 3610 3755 3694 3640 3551 3053 3745 3757 3507 3866 3150 3250 3102 3574 3236 3241 3006 3172 3596 3438 3160 3317 3122 2647 3136 3400 3348 3338 3485 2563 3181 2925 3104 3123 3158 3091 2554 2672 2850 3179 2903 2908 2688
Novo mesto Kday   3574 3917 3550 3682 3239 3275 3146 3519 3654 3371 3570 3714 3321 3244 3536 3086 3503 3534 3496 3438 3419 2850 3509 3523 3421 3596 2979 3116 2950 3350 3138 3063 2899 3099 3350 3286 2961 3193 2993 2447 2984 3186 3197 3139 3269 2229 3119 2920 2997 3089 3047 3028 2367 2578 2736 2993 2758 2756 2481
Ljubljana Kday 2873 3347 3736 3319 3464 3166 3124 3065 3438 3476 3277 3386 3584 3192 3177 3474 2960 3409 3553 3440 3503 3378 2937 3517 3440 3357 3568 2978 3110 2987 3295 3149 3019 2826 3012 3179 3068 2875 3074 2918 2463 2906 2950 3113 3049 3185 2146 3060 2870 2992 2862 2954 2899 2288 2523 2681 2822 2720 2607 2369
Bilje Kday     2895 2502 2663 2496 2445 2372 2572 2680 2561 2580 2800 2554 2672 2694 2223 2662 2802 2822 2924 2871 2472 2962 2840 2689 2944 2451 2661 2707 2654 2692 2570 2315 2485 2586 2455 2425 2596 2498 1991 2400 2327 2564 2533 2579 1879 2509 2229 2440 2349 2491 2391 1731 2052 2252 2329 2333 2160 1927
Figure PP11-2: Annual cooling degree days, Slovenia, 1961-2020
Sources:

Slovenian Environment Agency, 2021 (20. 04. 2021)

Show data
measuring point Unit 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020
Kredarica Kday 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Rateče Kday 0 0 0 0 0 0 0 5 0 0 2 0 0 0 0 1 0 0 0 0 0 0 10 3 0 1 0 0 0 0 2 6 2 7 3 0 0 5 0 1 0 10 15 3 4 19 6 3 6 17 8 14 28 1 28 4 1 13 27 5
Murska Sobota Kday 42 25 67 13 26 13 54 41 23 36 38 31 24 51 8 17 18 3 23 14 39 20 55 14 33 37 56 72 31 30 62 145 85 109 44 31 31 90 55 131 103 86 237 46 56 110 146 107 79 108 95 166 175 67 183 85 151 120 154 66
Novo mesto Kday   22 51 13 25 15 41 36 16 28 31 28 24 45 10 26 24 10 28 26 47 38 59 28 41 42 52 77 24 44 65 94 106 121 54 36 22 116 70 144 125 75 250 62 77 142 119 100 107 127 129 189 169 68 209 101 202 96 168 99
Ljubljana Kday 48 47 72 38 46 26 71 53 43 70 64 37 27 63 17 31 23 9 32 36 41 55 77 26 64 63 59 107 34 58 87 123 103 145 83 47 35 153 81 129 143 91 267 83 90 159 137 128 143 144 157 218 205 80 238 138 218 174 211 121
Bilje Kday     95 92 60 64 132 77 76 97 108 96 98 108 59 56 36 34 83 52 67 130 70 23 72 95 93 108 60 65 134 139 135 229 145 72 85 204 124 132 168 134 376 129 139 209 157 170 199 157 202 306 245 82 275 218 233 228 304 172
Figure PP11-3: Timeline of change in average annual heating degree days in Slovenia over the 21st century
Sources:

Slovenian Environment Agency, 2020 (20. 04. 2021)

Note:

The timeline of change in average annual heating degree days 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.

Figure PP11-4: Timeline of change in average annual heating degree days in Slovenia over the 21st century
Sources:

Slovenian Environment Agency, 2020 (20. 04. 2021)

Note:

The timeline of change in average annual cooling degree days 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.

Figure PP11-5: Projected change in average annual heating degree days in Slovenia and the associated reliability of change
Sources:

Slovenian Environment Agency, 2020 (20. 04. 2021)

Figure PP11-6: Projected change in average annual cooling degree days in Slovenia and the associated reliability of change
Sources:

Slovenian Environment Agency, 2020 (20. 04. 2021)

Figure PP11-7: Projected linear trend in heating and cooling degree days in Europe  over the period 1981-2100
Sources:

EEA, 2019 (15. 04. 2019)

Note:

These maps show the trend in heating degree days (left) and cooling degree days (right) from 1981-2100 under the RCP4.5 (upper panels) and RCP8.5 (lower panels). Projections are based on the median of an ensemble of 11 EURO-CORDEX simulations.

Methodology

Date of data source summarization
Last modified
20.04.2021
Author(s)

Ana Car, Mojca Dolinar, Slovenian Environment Agency