Marlborough, Wiltshire
| Year | Average Min. | Average Max. | Total Min.Max. | Mean. | No. Years | Cum. Mean | Average |
| 1984 | 7.33 | 14.15 | 21.48 | 10.74 | 1 | 10.74 | 10.74 |
| 1985 | 5.56 | 13.01 | 18.57 | 9.29 | 2 | 20.03 | 10.01 |
| 1986 | 5.20 | 13.68 | 18.88 | 9.44 | 3 | 29.47 | 9.82 |
| 1987 | 6.04 | 13.34 | 19.38 | 9.69 | 4 | 39.16 | 9.79 |
| 1988 | 5.37 | 13.36 | 18.73 | 9.37 | 5 | 48.52 | 9.70 |
| 1989 | 6.44 | 14.45 | 20.89 | 10.45 | 6 | 58.97 | 9.83 |
| 1990 | 6.18 | 14.21 | 20.39 | 10.20 | 7 | 69.16 | 9.88 |
| 1991 | 6.08 | 13.98 | 20.06 | 10.03 | 8 | 79.19 | 9.90 |
| 1992 | 5.38 | 12.79 | 18.17 | 9.09 | 9 | 88.28 | 9.81 |
| 1993 | 4.21 | 11.68 | 15.89 | 7.95 | 10 | 96.22 | 9.62 |
| 1994 | 7.30 | 14.23 | 21.53 | 10.77 | 11 | 106.99 | 9.73 |
| 1995 | 7.31 | 14.71 | 22.02 | 11.01 | 12 | 118.00 | 9.83 |
| 1996 | 6.01 | 13.74 | 19.75 | 9.88 | 13 | 127.87 | 9.84 |
| 1997 | 6.44 | 14.80 | 21.24 | 10.62 | 14 | 138.49 | 9.89 |
| 1998 | 6.61 | 13.80 | 20.41 | 10.21 | 15 | 148.70 | 9.91 |
| 1999 | 6.64 | 14.86 | 21.50 | 10.75 | 16 | 159.45 | 9.97 |
| 2000 | 6.73 | 13.99 | 20.72 | 10.36 | 17 | 169.81 | 9.99 |
| 2001 | 7.17 | 14.56 | 21.73 | 10.87 | 18 | 180.67 | 10.04 |
| 2002 | 6.75 | 14.74 | 21.49 | 10.75 | 19 | 191.42 | 10.07 |
| 2003 | 5.31 | 14.83 | 20.14 | 10.07 | 20 | 201.49 | 10.07 |
| 2004 | 7.05 | 14.41 | 21.46 | 10.73 | 21 | 212.22 | 10.11 |
| 2005 | 6.75 | 15.33 | 22.08 | 11.04 | 22 | 223.26 | 10.15 |
| 2006 | 8.27 | 16.21 | 24.48 | 12.24 | 23 | 235.50 | 10.24 |
| 2007 | 5.97 | 14.30 | 20.27 | 10.14 | 24 | 245.63 | 10.23 |
| 2008 | 5.63 | 13.54 | 19.17 | 9.59 | 25 | 255.22 | 10.21 |
| 2009 | 7.24 | 14.85 | 22.09 | 11.05 | 26 | 266.26 | 10.24 |
| 2010 | 5.23 | 13.33 | 18.56 | 9.28 | 27 | 275.54 | 10.21 |
| 2011 | 8.05 | 16.03 | 24.08 | 12.04 | 28 | 287.58 | 10.27 |