Marlborough, Wiltshire
| Year | Average Min. | Average Max. | Total Min.Max. | Mean | No. Year | Cum. Mean | Average |
| 1984 | -0.42 | 5.01 | 4.59 | 2.30 | 1 | 2.30 | 2.30 |
| 1985 | 0.40 | 4.83 | 5.23 | 2.62 | 2 | 4.92 | 2.46 |
| 1986 | 0.62 | 5.58 | 6.20 | 3.10 | 3 | 8.02 | 2.67 |
| 1987 | 2.05 | 7.23 | 9.28 | 4.64 | 4 | 12.66 | 3.16 |
| 1988 | 3.53 | 8.78 | 12.31 | 6.16 | 5 | 18.81 | 3.76 |
| 1989 | 3.33 | 8.78 | 12.11 | 6.06 | 6 | 24.87 | 4.14 |
| 1990 | -0.16 | 5.20 | 5.04 | 2.52 | 7 | 27.39 | 3.91 |
| 1991 | 1.08 | 6.47 | 7.55 | 3.78 | 8 | 31.16 | 3.90 |
| 1992 | 1.97 | 6.88 | 8.85 | 4.43 | 9 | 35.59 | 3.95 |
| 1993 | 2.01 | 7.06 | 9.07 | 4.54 | 10 | 40.12 | 4.01 |
| 1994 | 2.88 | 8.30 | 11.18 | 5.59 | 11 | 45.71 | 4.16 |
| 1995 | 0.64 | 4.93 | 5.57 | 2.79 | 12 | 48.50 | 4.04 |
| 1996 | 1.00 | 5.84 | 6.84 | 3.42 | 13 | 51.92 | 3.99 |
| 1997 | 2.46 | 8.53 | 10.99 | 5.50 | 14 | 57.41 | 4.10 |
| 1998 | 2.28 | 8.11 | 10.39 | 5.20 | 15 | 62.61 | 4.17 |
| 1999 | 1.16 | 7.77 | 8.93 | 4.47 | 16 | 67.07 | 4.19 |
| 2000 | 1.41 | 6.98 | 8.39 | 4.20 | 17 | 71.27 | 4.19 |
| 2001 | 1.51 | 8.04 | 9.55 | 4.78 | 18 | 76.04 | 4.22 |
| 2002 | 1.62 | 7.07 | 8.69 | 4.35 | 19 | 80.39 | 4.23 |
| 2003 | 1.79 | 7.69 | 9.48 | 4.74 | 20 | 85.13 | 4.26 |
| 2004 | 1.50 | 7.54 | 9.04 | 4.52 | 21 | 89.65 | 4.27 |
| 2005 | 0.31 | 6.30 | 6.61 | 3.31 | 22 | 92.95 | 4.23 |
| 2006 | 3.17 | 8.91 | 12.08 | 6.04 | 23 | 98.99 | 4.30 |
| 2007 | 1.38 | 8.57 | 9.95 | 4.98 | 24 | 103.97 | 4.33 |
| 2008 | -0.38 | 5.88 | 5.50 | 2.75 | 25 | 106.72 | 4.27 |
| 2009 | -0.77 | 4.83 | 4.06 | 2.03 | 26 | 108.75 | 4.18 |
| 2010 | 0.12 | 5.42 | 5.54 | 2.77 | 27 | 111.52 | 4.13 |