| 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 | 2021 | 2022 | 2023 | 2024 | 2025 |
Heizgradtage 12/20 Grambach
| 2003 | Jänner | Februar | März | April | Mai | Juni | Juli | August | September | Oktober | November | Dezember |
| 1 | 19.0 | 22.2 | 15.0 | 11.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.7 | 14.4 |
| 2 | 18.2 | 24.1 | 14.9 | 12.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.8 | 14.3 |
| 3 | 17.0 | 22.2 | 13.8 | 12.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.4 | 15.0 |
| 4 | 17.4 | 19.1 | 13.1 | 13.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.4 | 16.0 |
| 5 | 20.0 | 18.0 | 14.9 | 13.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 13.5 | 16.3 |
| 6 | 22.5 | 18.1 | 16.8 | 14.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.4 | 14.7 | 16.6 |
| 7 | 24.2 | 19.6 | 15.7 | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.4 | 13.8 | 18.0 |
| 8 | 25.6 | 21.0 | 14.7 | 15.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 12.6 | 19.1 |
| 9 | 25.8 | 20.2 | 12.4 | 15.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.5 | 12.9 | 19.8 |
| 10 | 25.8 | 20.4 | 10.8 | 15.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 14.4 | 20.0 |
| 11 | 28.3 | 21.2 | 10.7 | 15.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 15.1 | 18.7 |
| 12 | 29.9 | 22.3 | 10.4 | 12.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.3 | 15.5 | 18.2 |
| 13 | 26.1 | 23.0 | 13.0 | 9.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.7 | 16.3 | 17.6 |
| 14 | 22.3 | 22.6 | 15.3 | 9.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.3 | 16.0 | 16.8 |
| 15 | 20.9 | 21.7 | 15.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 12.1 | 15.7 | 17.5 |
| 16 | 21.7 | 21.1 | 14.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 13.4 | 15.2 | 19.0 |
| 17 | 23.6 | 22.0 | 13.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 14.1 | 13.8 | 18.9 |
| 18 | 23.7 | 22.2 | 13.0 | 8.5 | 0.0 | 0.0 | 0.0 | 0.0 | 13.4 | 11.7 | 18.3 | |
| 19 | 23.2 | 21.5 | 12.3 | 8.4 | 0.0 | 0.0 | 0.0 | 0.0 | 12.5 | 10.2 | 18.6 | |
| 20 | 23.4 | 21.3 | 13.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.1 | 11.2 | 18.7 |
| 21 | 22.1 | 20.1 | 17.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.5 | 12.4 | 18.3 |
| 22 | 19.6 | 19.6 | 17.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 13.8 | 12.2 | 17.5 |
| 23 | 19.1 | 19.7 | 13.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 15.6 | 12.1 | 19.5 |
| 24 | 19.0 | 19.2 | 10.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 16.5 | 11.7 | 22.6 |
| 25 | 18.4 | 19.1 | 8.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 16.1 | 11.7 | 23.4 |
| 26 | 19.1 | 18.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 15.0 | 11.8 | 22.8 |
| 27 | 19.7 | 16.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 15.4 | 11.3 | 20.4 |
| 28 | 19.1 | 15.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 16.7 | 11.9 | 17.3 |
| 29 | 18.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 15.7 | 12.4 | 16.5 | |
| 30 | 18.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 13.3 | 13.7 | 16.6 | |
| 31 | 19.1 | 8.6 | 0.0 | 0.0 | 0.0 | 9.7 | 17.0 | |||||
| Gesamt | 671.3 | 571.8 | 351.3 | 204.5 | 0 | 0 | 0 | 0 | 0 | 302.5 | 386.1 | 563.7 |