| 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
| 1996 | Jänner | Februar | März | April | Mai | Juni | Juli | August | September | Oktober | November | Dezember |
| 1 | 20.4 | 24.4 | 18.1 | 16.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 12.2 | 19.0 |
| 2 | 19.8 | 21.7 | 18.6 | 16.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.0 | 9.9 | 19.3 |
| 3 | 21.5 | 19.1 | 20.6 | 16.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.6 | 9.4 | 18.7 |
| 4 | 22.6 | 20.5 | 21.7 | 15.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.4 | 9.5 | 19.8 |
| 5 | 22.8 | 23.5 | 20.0 | 15.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 9.0 | 20.9 |
| 6 | 22.6 | 23.8 | 18.3 | 12.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.5 | 9.2 | 20.9 |
| 7 | 20.8 | 22.7 | 18.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.5 | 20.7 |
| 8 | 19.0 | 22.3 | 18.4 | 8.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.5 | 20.5 |
| 9 | 18.2 | 23.9 | 19.1 | 9.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 13.0 | 20.2 |
| 10 | 17.9 | 24.0 | 19.7 | 9.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.2 | 12.4 | 19.2 |
| 11 | 18.5 | 22.3 | 21.3 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.9 | 8.2 | 18.5 |
| 12 | 18.3 | 21.6 | 20.4 | 14.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.2 | 0.0 | 18.7 |
| 13 | 17.5 | 19.9 | 18.3 | 15.5 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 10.0 | 0.0 | 18.4 |
| 14 | 17.9 | 19.4 | 17.8 | 12.3 | 0.0 | 0.0 | 0.0 | 0.0 | 9.3 | 8.7 | 10.0 | 17.4 |
| 15 | 19.0 | 20.8 | 17.7 | 10.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.6 | 17.5 |
| 16 | 21.3 | 21.3 | 16.8 | 9.6 | 0.0 | 0.0 | 0.0 | 0.0 | 8.8 | 0.0 | 10.2 | 18.6 |
| 17 | 23.2 | 19.7 | 15.7 | 8.2 | 0.0 | 0.0 | 0.0 | 0.0 | 10.3 | 8.3 | 10.0 | 18.7 |
| 18 | 22.6 | 18.3 | 15.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.8 | 9.8 | 10.9 | 17.5 |
| 19 | 21.7 | 17.5 | 16.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 9.8 | 12.2 | 16.7 |
| 20 | 21.4 | 18.2 | 15.8 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.8 | 9.5 | 13.8 | 17.0 |
| 21 | 20.9 | 19.8 | 15.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.5 | 15.7 | 19.2 |
| 22 | 22.1 | 21.3 | 15.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.3 | 16.9 | 20.8 |
| 23 | 23.6 | 23.8 | 14.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 12.6 | 17.6 | 21.2 |
| 24 | 23.8 | 23.7 | 14.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 8.5 | 14.0 | 18.8 | 22.4 |
| 25 | 24.0 | 21.3 | 13.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.6 | 13.9 | 19.1 | 24.1 |
| 26 | 22.8 | 20.5 | 14.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.1 | 12.6 | 18.4 | 27.3 |
| 27 | 20.7 | 20.4 | 14.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.5 | 18.2 | 29.8 |
| 28 | 20.2 | 20.2 | 14.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10.6 | 19.0 | 28.4 |
| 29 | 20.5 | 19.4 | 15.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 9.6 | 19.8 | 27.2 |
| 30 | 21.7 | 14.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 11.1 | 19.1 | 29.1 | |
| 31 | 23.9 | 15.3 | 0.0 | 0.0 | 0.0 | 13.4 | 29.2 | |||||
| Gesamt | 651.2 | 615.3 | 530.2 | 201.7 | 0 | 0 | 0 | 0 | 92.2 | 256 | 373.1 | 656.9 |