| Observations at Pitsford Hall | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th | 16th | 17th | 18th | 19th | 20th | 21st | 22nd | 23rd | 24th | 25th | 26th | 27th* | 28th* | 29th* | 30th* | 31st |
| Time of Observations (GMT) | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 |
| Total Cloud (oktas) | 1 | 8 | 1 | 5 | 6 | 8 | 3 | 8 | 5 | 8 | 4 | 2 | 1 | 8 | 8 | 8 | 8 | 8 | 8 | 1 | 8 | 9 | 9 | 8 | 8 | 7 | 8 | 8 | 0 | 8 | 8 |
| Wind |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Direction | ssw | s | w | s | s | s | nw | s | s | n | w | sse | calm | sse | ene | e | e | e | ene | ese | ese | s | wsw | ssw | n | ssw | ssw | ssw | wsw | nw | ssw |
| Speed (knots) | 14 | 12 | 7 | 6 | 8 | 7 | 3 | 10 | 16 | 17 | 5 | 2 | 0 | 3 | 5 | 6 | 9 | 7 | 9 | 1 | 1 | 1 | 1 | 14 | 1 | 6 | 17 | 25 | 12 | 1 | 1 |
| Weather | 2 | 63 | 0 | 2 | 63 | 50 | 1 | 63 | 2 | 20 | 1 | 1 | 41 | 1 | 10 | 10 | 2 | 10 | 10 | 28 | 10 | 43 | 48 | 2 | 61 | 2 | 2 | 2 | 1 | 2 | 10 |
| Visibility | 8 | 5 | 7 | 5 | 5 | 6 | 6 | 6 | 7 | 8 | 8 | 7 | 6 | 5 | 7 | 7 | 6 | 6 | 4 | 5 | 5 | 4 | 2 | 7 | 5 | 7 | 7 | 7 | 7 | 7 | 6 |
| Screen (C) |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Dry Bulb | 6.0 | 8.0 | 5.6 | 6.9 | 12.2 | 11.0 | 6.1 | 3.9 | 5.1 | 4.8 | 0.5 | 0.5 | -0.9 | 0.9 | 1.2 | 1.6 | 1.7 | 2.4 | 3.5 | -4.2 | 0.1 | 1.1 | -1.0 | 6.5 | 6.9 | 3.8 | 10.0 | 9.6 | 4.0 | 5.8 | 5.1 |
| Wet Bulb | 4.9 | 7.7 | 3.9 | 6.0 | 11.9 | 10.6 | 5.0 | 3.6 | 4.1 | 4.0 | 0.0 | 0.0 | -1.1 | 0.7 | 0.8 | 0.7 | 0.4 | 1.4 | 3.2 | -4.3 | 0.1 | 0.3 | -1.0 | 6.0 | 6.8 | 3.0 | 8.9 | 8.0 | 3.2 | 5.0 | 5.0 |
| Max | 8.5 | 11.4 | 8.9 | 13.1 | 13.0 | 14.9 | 8.5 | 10.8 | 7.0 | 6.5 | 5.5 | 6.7 | 6.5 | 3.1 | 4.4 | 4.0 | 3.0 | 3.6 | 5.0 | 1.6 | 1.4 | 6.6 | 6.6 | 9.4 | 7.0 | 10.4 | 11.6 | 10.4 | 7.6 | 7.6 | 7.3 |
| Min | 4.6 | 4.9 | 5.2 | 4.6 | 5.6 | 7.4 | 5.5 | 3.0 | 3.5 | 4.0 | -1.5 | -1.9 | -2.2 | -1.0 | 0.4 | -0.5 | -1.9 | 1.6 | 2.0 | -5.2 | -4.4 | -1.2 | -2.2 | -2.0 | 6.1 | 2.4 | 3.4 | 9.2 | 3.6 | 4.0 | 3.6 |
| Black Bulb (globe, C) | 6.4 | 7.8 | 5 | 5.5 | 12.1 | 10.9 | 5.6 | 3.6 | 5 | 4 | -1 | -0.9 | -1.5 | 1 | 2.8 | 1.8 | 1.4 | 2.6 | 4 | -2.8 | 0.3 | 1 | -0.6 | 6.4 | 7 | 3.5 | 10.1 | _ | _ | 5.7 | 5.2 |
| Concrete |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| State of Concrete | 0 | 2 | 0 | 0 | 1 | 1 | 0 | 2 | 1 | 1 | 0 | 3 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 1 | 1 | 3 | 1 | 2 | 1 | 1 | 0 | 0 | 0 | 0 |
| Concrete Min (C) | 2.6 | 3.0 | 2.4 | 0.9 | 2.3 | 4.9 | 3.2 | -0.4 | 1.8 | 3.0 | -4.0 | -4.5 | -5.2 | -4.0 | -1.8 | -3.3 | -4.5 | -0.5 | 0.7 | -7.1 | -6.0 | -1.5 | -3.9 | -3.1 | 4.1 | -0.4 | 0.9 | 6.0 | 1.9 | 2.2 | 1.6 |
| Evaporation |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Piche (ml) | 2.5 | 2.3 | 2 | 2.4 | 2.7 | 2.6 | 3.1 | 2.8 | 1.5 | 2.4 | 0.6 | 0.8 | 0.8 | 0.6 | 0.8 | > | 2 | 0.8 | > | > | 1.4 | > | 0.9 | 1.5 | 0.4 | 1.7 | > | > | 9.5 | 0.9 | 0.8 |
| Pan (over interval, mm) | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > |
| Rainfall |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Total (mm) | 2.7 | 2.3 | 0.4 | 3.9 | 0.8 | 5.1 | 0.3 | 6.7 | 4.8 | 0.1 | _ | _ | 0.1 | _ | _ | tr(x) | _ | _ | _ | 0.1 | tr(fe) | 0.5 | 0.1 | 5.2 | 2.0 | tr | _ | 3.2 | 0.1 | 0.1 | _ |
| Duration (hrs) | 1.2 | 1.7 | 0.4 | 3.6 | 0.7 | 3.2 | 0.3 | 4.6 | 6.8 | 0.0 | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | 1.3 | _ | 7.6 | 3.1 | _ | _ | 3.2 | 0.1 | _ | _ |
| Intensity (mean over 24 hrs, mm/hr) | 2.3 | 1.4 | 1.0 | 1.1 | 1.1 | 1.6 | 1.0 | 1.5 | 0.7 | 0.0 | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | 0.4 | _ | 0.7 | 0.6 | _ | _ | 1.0 | 1.0 | _ | _ |
| Run of Wind |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Miles (over 24 hrs) | 241.53 | 205.4 | 141.19 | 302.45 | 292.51 | 180.52 | 189.15 | 209.46 | 243.71 | 176.55 | 32.94 | 35.2 | 61.57 | 52.6 | 58.28 | 84.95 | 152.29 | 113.46 | 199.05 | 142.29 | 127.6 | 82.93 | 175.68 | 235.62 | 119.5 | 264.73 | 390.86 | 415.28 | 244.2 | 49.38 | 95.08 |
| Mean (mph) | 13.1 | 11.1 | 7.6 | 16.4 | 15.8 | 9.8 | 10.2 | 11.3 | 13.2 | 9.6 | 1.8 | 1.9 | 3.3 | 2.8 | 3.2 | 4.6 | 8.2 | 6.1 | 10.8 | 7.7 | 6.9 | 4.5 | 9.5 | 12.8 | 6.5 | 14.3 | 21.2 | 22.5 | 13.2 | 2.7 | 5.2 |
| Gust (mph) | 30 | 38 | 28 | 36 | 30 | 59 | 43 | 29 | 51 | 37 | <15 | <15 | <15 | <15 | 18 | 19 | 31 | 20 | 16 | 15 | <15 | <15 | 21 | 25 | 19 | 28 | 38 | 43 | 41 | <15 | <15 |
| Sunshine (hrs) | 3.4 | 2.1 | 3.4 | 0.0 | 1.4 | 0.0 | 1.1 | 0.0 | 0.0 | 2.0 | 4.5 | 4.5 | 3.5 | 0.0 | 0.6 | 2.0 | 1.0 | 0.0 | 1.8 | 0.0 | 0.0 | 0.0 | 1.5 | 0.0 | 0.0 | 1.5 | 0.0 | 0.0 | 6.2 | 0.0 | 0.0 |
| Humidity Statistics |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Saturated |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| VP(Twb) | 0.867 | 1.052 | 0.808 | 0.936 | 1.394 | 1.279 | 0.873 | 0.791 | 0.819 | 0.814 | 0.611 | 0.611 | 0.564 | 0.643 | 0.648 | 0.643 | 0.629 | 0.676 | 0.769 | 0.444 | 0.615 | 0.624 | 0.568 | 0.936 | 0.989 | 0.758 | 1.141 | 1.073 | 0.769 | 0.873 | 0.873 |
| VP | 0.793 | 1.032 | 0.693 | 0.875 | 1.374 | 1.252 | 0.799 | 0.771 | 0.751 | 0.76 | 0.577 | 0.577 | 0.551 | 0.63 | 0.621 | 0.582 | 0.542 | 0.609 | 0.749 | 0.437 | 0.615 | 0.57 | 0.568 | 0.902 | 0.982 | 0.704 | 1.066 | 0.964 | 0.715 | 0.819 | 0.866 |
| Saturated |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| VP | 0.936 | 1.073 | 0.91 | 0.995 | 1.422 | 1.313 | 0.942 | 0.808 | 0.879 | 0.861 | 0.634 | 0.634 | 0.572 | 0.652 | 0.666 | 0.686 | 0.691 | 0.726 | 0.785 | 0.448 | 0.615 | 0.662 | 0.568 | 0.968 | 0.995 | 0.802 | 1.229 | 1.196 | 0.814 | 0.923 | 0.879 |
| Rel. Humidity | 84.7 | 96.2 | 76.2 | 87.9 | 96.6 | 95.4 | 84.8 | 95.4 | 85.4 | 88.3 | 91 | 91 | 96.3 | 96.6 | 93.2 | 84.8 | 78.4 | 83.9 | 95.4 | 97.5 | 100 | 86.1 | 100 | 93.2 | 98.7 | 87.8 | 86.7 | 80.6 | 87.8 | 88.7 | 98.5 |
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Dew Point (C) | 3.6 | 7.4 | 1.7 | 5 | 11.7 | 10.3 | 3.7 | 3.2 | 2.9 | 3 | -0.8 | -0.8 | -1.4 | 0.4 | 0.2 | -0.7 | -1.6 | 0 | 2.8 | -4.5 | 0.1 | -1 | -1 | 5.5 | 6.7 | 2 | 7.9 | 6.4 | 2.2 | 4.1 | 4.9 |
| Pressure (mb) | 999.5 | 989.3 | 1001.3 | 1013.5 | 1001.7 | 1006.5 | 997.1 | 1001.9 | 979.0 | 1008.5 | 1031.9 | 1037.3 | 1041.6 | 1041.6 | 1037.8 | 1038.5 | 1039.6 | 1038.6 | 1038.9 | 1036.7 | 1027.7 | 1023.3 | 1029.5 | 1021.1 | 1011.7 | 1023.0 | 1021.8 | 1016.6 | 1007.7 | 1025.7 | 1028.7 |
| Days with |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| thunder | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| hail<5mm | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| hail>/=5mm | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| snow | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| fog | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | 1 | 1 | _ | _ | _ | _ | _ | _ | _ | _ |
| gales | _ | _ | _ | _ | _ | 1 | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |