Marlborough, Wiltshire
| Year | Average Min. | Average Max. | Total Min.Max. | Mean | No. Years | Cum. Mean | Average |
| 1984 | 1.71 | 11.95 | 13.66 | 6.83 | 1 | 6.83 | 6.83 |
| 1985 | 2.54 | 11.80 | 14.34 | 7.17 | 2 | 14.00 | 7.00 |
| 1986 | 2.86 | 11.33 | 14.19 | 7.10 | 3 | 21.10 | 7.03 |
| 1987 | 2.94 | 12.06 | 15.00 | 7.50 | 4 | 28.60 | 7.15 |
| 1988 | 4.06 | 13.49 | 17.55 | 8.78 | 5 | 37.37 | 7.47 |
| 1989 | 3.87 | 14.18 | 18.05 | 9.03 | 6 | 46.40 | 7.73 |
| 1990 | 3.10 | 15.18 | 18.28 | 9.14 | 7 | 55.54 | 7.93 |
| 1991 | 3.99 | 13.08 | 17.07 | 8.54 | 8 | 64.07 | 8.01 |
| 1992 | 4.45 | 14.26 | 18.71 | 9.36 | 9 | 73.43 | 8.16 |
| 1993 | 4.40 | 13.49 | 17.89 | 8.95 | 10 | 82.37 | 8.24 |
| 1994 | 4.34 | 13.08 | 17.42 | 8.71 | 11 | 91.08 | 8.28 |
| 1995 | 3.33 | 13.97 | 17.30 | 8.65 | 12 | 99.73 | 8.31 |
| 1996 | 3.06 | 11.88 | 14.94 | 7.47 | 13 | 107.20 | 8.25 |
| 1997 | 4.37 | 15.11 | 19.48 | 9.74 | 14 | 116.94 | 8.35 |
| 1998 | 5.23 | 14.23 | 19.46 | 9.73 | 15 | 126.67 | 8.44 |
| 1999 | 5.34 | 14.45 | 19.79 | 9.90 | 16 | 136.57 | 8.54 |
| 2000 | 4.68 | 13.50 | 18.18 | 9.09 | 17 | 145.66 | 8.57 |
| 2001 | 4.33 | 13.00 | 17.33 | 8.67 | 18 | 154.32 | 8.57 |
| 2002 | 4.99 | 14.35 | 19.34 | 9.67 | 19 | 163.99 | 8.63 |
| 2003 | 4.31 | 15.13 | 19.44 | 9.72 | 20 | 173.71 | 8.69 |
| 2004 | 4.36 | 14.16 | 18.52 | 9.26 | 21 | 182.97 | 8.71 |
| 2005 | 4.52 | 14.07 | 18.59 | 9.30 | 22 | 192.27 | 8.74 |
| 2006 | 4.49 | 13.28 | 17.77 | 8.89 | 23 | 201.15 | 8.75 |
| 2007 | 4.92 | 16.04 | 20.96 | 10.48 | 24 | 211.63 | 8.82 |
| 2008 | 4.68 | 13.98 | 18.66 | 9.33 | 25 | 220.96 | 8.84 |
| 2009 | 4.38 | 15.05 | 19.43 | 9.72 | 26 | 230.68 | 8.87 |
| 2010 | 3.30 | 14.23 | 17.53 | 8.77 | 27 | 239.44 | 8.87 |
| 2011 | 4.89 | 16.12 | 21.01 | 10.51 | 28 | 249.95 | 8.93 |