Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
---|---|---|---|---|---|---|---|---|---|---|---|---|
1990 | -12.6( 90) | -17.8(100) | -22.7(100) | -27.5(100) | -25.4(100) | -26.5(100) | -21.1(100) | -30.5( 96) | -29.1(100) | -23.8( 58) | -8.4( 60) | -11.7( 35) |
1991 | -13.9( 74) | -15.1(100) | -22.6(100) | -23.7(100) | -26.7(100) | -23.2(100) | -27.4(100) | -25.0(100) | -18.0( 53) | - | -16.6( 73) | -10.4( 48) |
1992 | -12.7(100) | -16.9(100) | -21.3(100) | -26.2(100) | -25.3(100) | -23.9( 50) | - | - | - | - | - | - |
1993 | -11.6( 67) | -17.0(100) | -21.5(100) | -26.2(100) | -30.2(100) | -29.6(100) | -27.6(100) | -27.5(100) | -25.2(100) | -25.2(100) | -19.8( 60) | -12.5( 61) |
1994 | -12.8(100) | -18.1(100) | -24.6(100) | -23.9(100) | -31.4(100) | -28.0(100) | -24.7(100) | -30.9(100) | -24.4(100) | -23.1(100) | -19.1(100) | -14.7(100) |
1995 | -14.0( 93) | -15.7(100) | -22.2(100) | -24.4( 90) | -28.4( 90) | -28.4(100) | -28.7(100) | -25.6(100) | -27.4(100) | -25.3(100) | -18.9( 90) | -13.4( 87) |
1996 | -14.4(100) | -17.1(100) | -20.6(100) | -22.7(100) | -29.3(100) | -28.4(100) | -27.4(100) | -25.5(100) | -25.6(100) | -26.3(100) | -16.0(100) | -13.2(100) |
1997 | -13.3(100) | -17.5(100) | -22.2(100) | -26.3(100) | -27.7(100) | -26.5(100) | -30.1(100) | -32.1(100) | -27.8(100) | -21.8( 87) | -15.6(100) | -14.4(100) |
1998 | -14.4(100) | -15.7(100) | -25.0(100) | -26.3(100) | -27.2(100) | -25.8(100) | -29.2(100) | -27.6(100) | -27.8(100) | -23.1(100) | -19.6(100) | -12.8(100) |
1999 | -13.1(100) | -17.0(100) | -23.1(100) | -28.6(100) | -29.3(100) | -26.8(100) | -27.0(100) | -28.3(100) | -26.8(100) | -23.1(100) | -17.7(100) | -14.8(100) |
2000 | -14.7(100) | -18.1(100) | -22.4(100) | -27.0(100) | -26.4(100) | -28.0(100) | -26.7(100) | -28.5(100) | -23.0(100) | -24.5( 90) | -18.0(100) | -14.7(100) |
2001 | -13.2(100) | -17.0(100) | -22.3(100) | -26.5(100) | -26.3(100) | -26.9(100) | -27.6(100) | -27.9(100) | -25.3(100) | -24.5(100) | -19.6(100) | -12.7(100) |
2002 | -11.5(100) | -17.4(100) | -21.2(100) | -26.5(100) | -25.6(100) | -23.9(100) | -27.7(100) | -32.3(100) | -24.5(100) | -24.8(100) | -19.7(100) | -14.4(100) |
2003 | -11.7(100) | -17.5(100) | -24.1(100) | -27.5(100) | -26.6(100) | -28.1(100) | -28.1(100) | -27.7(100) | -27.3(100) | -24.6(100) | -20.5(100) | -13.0(100) |
2004 | -12.9(100) | -16.9(100) | -22.9(100) | -25.3(100) | -29.2(100) | -23.9(100) | -31.6(100) | -26.2(100) | -26.8(100) | -24.8(100) | -18.2(100) | -12.3(100) |
2005 | -12.9(100) | -18.6(100) | -23.1(100) | -26.9(100) | -26.3(100) | -27.6(100) | -27.3(100) | -28.1(100) | -26.1(100) | -20.6( 51) | - | - |
2006 | - | - | - | - | - | - | - | - | - | - | - | - |
2007 | - | - | - | - | - | - | - | - | - | - | - | - |
2008 | - | - | - | - | - | - | - | - | - | - | - | - |
2009 | - | - | - | - | - | - | - | - | - | - | - | - |
2010 | - | - | - | - | - | - | - | - | - | - | - | - |
2011 | - | - | - | - | - | - | - | - | - | - | - | - |
2012 | - | - | - | - | - | - | - | - | - | - | - | - |
2013 | - | - | - | - | - | - | - | - | - | - | - | - |
2014 | - | - | - | - | - | - | - | - | - | - | - | - |
2015 | - | - | - | - | - | - | - | - | - | - | - | - |
2016 | - | - | - | - | - | - | - | - | - | - | - | - |
2017 | - | - | - | - | - | - | - | - | - | - | - | - |
2018 | - | - | - | - | - | - | - | - | - | - | - | - |
2019 | - | - | - | - | - | - | - | - | - | - | - | - |
2020 | - | - | - | - | - | - | - | - | - | - | - | - |
2021 | - | - | - | - | - | - | - | - | - | - | - | - |
2022 | - | - | - | - | - | - | - | - | - | - | - | - |
2023 | - | - | - | - | - | - | - | - | - | - | - | - |
2024 | - | - | - | - | - | - | - | - | - | - | - | - |