| 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 |
| Time of Observations (GMT) | 9.00 | 8.00 | 8.00 | 9.00 | 9.00 | 7.00 | 9.00 | 9.00 | 9.00 | 8.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 8.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 8.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 | 9.00 |
| Total Cloud (oktas) | 1 | 0 | 3 | 8 | 8 | 8 | 8 | 8 | 3 | 8 | 8 | 8 | 6 | 7 | 4 | 8 | 6 | 8 | 6 | 5 | 5 | 8 | 8 | 8 | 5 | 6 | 8 | 4 | 8 | 8 |
| Wind | ||||||||||||||||||||||||||||||
| Direction | e | calm | calm | nne | nnw | ne | n | nnw | ne | ne | calm | wsw | w | nne | nnw | ssw | ssw | calm | ene | ese | sse | calm | nw | s | sse | nw | w | ssw | wsw | sse |
| Speed (knots) | 3 | 0 | 0 | 2 | 14 | 11 | 8 | 8 | 2 | 4 | 0 | 4 | 6 | 4 | 4 | 7 | 3 | 0 | 3 | 9 | 4 | 0 | 8 | 2 | 1 | 15 | 10 | 2 | 9 | 2 |
| Weather | 2 | 5 | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 1 | 1 | 1 | 3 | 3 | 2 | 3 | 2 | 3 | 2 | 10 | 60 | 1 | 1 | 3 | 3 | 3 | 61 |
| Visibility | 8 | 7 | 6 | 6 | 6 | 6 | 5 | 6 | 6 | 5 | 4 | 5 | 7 | 7 | 7 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 7 |
| Screen (C) | ||||||||||||||||||||||||||||||
| Dry Bulb | 17.6 | 14.5 | 17.3 | 13.3 | 11.7 | 10.0 | 12.1 | 14.5 | 20.9 | 13.1 | 15.1 | 18.5 | 19.4 | 16.8 | 16.8 | 17.4 | 14.6 | 15.5 | 20.1 | 17.7 | 17.6 | 16.1 | 16.0 | 13.2 | 15.0 | 12.7 | 14.2 | 14.5 | 17.2 | 14.3 |
| Wet Bulb | 13.1 | 12.9 | 15.1 | 12.9 | 10.7 | 9.0 | 11.5 | 13.9 | 17.4 | 12.9 | 14.6 | 17.0 | 16.1 | 15.2 | 14.8 | 14.5 | 11.8 | 14.3 | 16.6 | 15.0 | 14.8 | 15.4 | 14.8 | 12.1 | 12.5 | 8.5 | 8.5 | 11.6 | 14.5 | 13.6 |
| Max | 20.6 | 23.4 | 22.6 | 19.4 | 20.0 | 14.7 | 16.8 | 20.7 | 24.6 | 19.7 | 18.4 | 20.9 | 22.0 | 18.6 | 21.1 | 19.3 | 20.2 | 20.5 | 23.1 | 22.0 | 21.8 | 19.4 | 19.1 | 15.7 | 18.7 | 14.9 | 16.5 | 18.5 | 18.6 | 18.5 |
| Min | 8.6 | 7.9 | 10.6 | 10.5 | 8.5 | 9.4 | 9.6 | 12.1 | 14.3 | 11.0 | 11.2 | 13.5 | 11.8 | 14.1 | 13.5 | 11.0 | 9.1 | 10.8 | 10.4 | 11.2 | 9.8 | 11.0 | 12.1 | 11.0 | 11.4 | 9.0 | 8.6 | 6.4 | 12.0 | 11.0 |
| Pan | ||||||||||||||||||||||||||||||
| Evaporation (mm) | ||||||||||||||||||||||||||||||
| Evap. over interval | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > | > |
| Rainfall (mm) | ||||||||||||||||||||||||||||||
| Total | 0.1 | _ | 15.1 | tr | _ | 0.1 | 0.3 | tr | _ | _ | _ | _ | 3.0 | 68.8 | 0.7 | 13.7 | 14.4 | 2.3 | 8.7 | 0.6 | 8.8 | 7.8 | 0.1 | 10.8 | 4.6 | tr | 0.7 | 5.1 | 2.3 | 8.1 |
| Duration (hrs) | _ | _ | 5.6 | _ | _ | 3.5 | 0.7 | _ | _ | _ | _ | _ | 4.2 | 13.2 | 0.8 | 1.9 | 7.0 | 0.8 | 1.8 | 0.2 | 7.5 | 3.1 | 0.2 | 4.1 | 3.2 | _ | 0.9 | 4.6 | 4.0 | 8.1 |
| Intensity (mean over 24 hrs, mm/hr) | _ | _ | 2.7 | _ | _ | 0.0 | 0.4 | _ | _ | _ | _ | _ | 0.7 | 5.2 | 0.9 | 7.2 | 2.1 | 2.9 | 4.8 | 3.0 | 1.2 | 2.5 | 0.5 | 2.6 | 1.4 | _ | 0.8 | 1.1 | 0.6 | 1.0 |
| Run of Wind | ||||||||||||||||||||||||||||||
| Miles (over 24 hrs) | 58.94 | 29.74 | 70.27 | 106.83 | 114.38 | 107.15 | 69.76 | 31.54 | 56.38 | 57.38 | 35.19 | 75.42 | 53.8 | 81.06 | 65.7 | 54.3 | 44.84 | 56.9 | 117.32 | 104.85 | 67.3 | 68.08 | 77.7 | 79.27 | 181.91 | 22.5 | 185.76 | 116.01 | 98.3 | 89.06 |
| Mean (mph) | 3.2 | 1.6 | 3.8 | 5.8 | 6.2 | 5.8 | 3.8 | 1.7 | 3.1 | 3.1 | 1.9 | 4.1 | 2.9 | 4.4 | 3.6 | 2.9 | 2.4 | 3.1 | 6.4 | 5.7 | 3.6 | 3.7 | 4.2 | 4.3 | 9.9 | 1.2 | 10.1 | 6.3 | 5.3 | 4.8 |
| Gust (mph) | 15 | 16 | 17 | 23 | 22 | 19 | 16 | <15 | <15 | <15 | <15 | 16 | 15 | 21 | 20 | 16 | 0 | 17 | 24 | 20 | 20 | 18 | 16 | 20 | 43 | 26 | 26 | 22 | 25 | 19 |
| Sunshine (hrs) | 12.5 | 11.7 | 8.3 | 1.9 | 8.2 | 1.2 | 0.0 | 1.4 | 11.9 | 2.3 | 1.0 | 4.2 | 3.7 | 0.0 | 4.5 | 4.2 | 3.7 | 4.1 | 9.2 | 8.6 | 5.1 | 0.7 | 3.4 | 0.0 | 4.9 | 0.0 | 3.5 | 5.1 | 7.3 | 0.0 |
| Humidity Statistics | ||||||||||||||||||||||||||||||
| Saturated | ||||||||||||||||||||||||||||||
| VP(Twb) | 1.508 | 1.489 | 1.717 | 1.489 | 1.287 | 1.149 | 1.358 | 1.589 | 1.988 | 1.489 | 1.663 | 1.939 | 1.831 | 1.728 | 1.684 | 1.652 | 1.385 | 1.631 | 1.89 | 1.706 | 1.684 | 1.751 | 1.684 | 1.413 | 1.45 | 1.11 | 1.11 | 1.367 | 1.652 | 1.558 |
| VP | 1.201 | 1.38 | 1.566 | 1.462 | 1.219 | 1.081 | 1.317 | 1.548 | 1.748 | 1.475 | 1.629 | 1.836 | 1.605 | 1.618 | 1.547 | 1.454 | 1.194 | 1.549 | 1.65 | 1.521 | 1.492 | 1.703 | 1.602 | 1.338 | 1.279 | 0.825 | 0.723 | 1.169 | 1.467 | 1.51 |
| Saturated | ||||||||||||||||||||||||||||||
| VP | 2.014 | 1.652 | 1.976 | 1.528 | 1.376 | 1.229 | 1.413 | 1.652 | 2.473 | 1.508 | 1.717 | 2.131 | 2.254 | 1.914 | 1.914 | 1.988 | 1.663 | 1.762 | 2.354 | 2.026 | 2.014 | 1.831 | 1.819 | 1.518 | 1.706 | 1.469 | 1.62 | 1.652 | 1.963 | 1.631 |
| RH % | 59.6 | 83.5 | 79.3 | 95.7 | 88.6 | 88 | 93.2 | 93.7 | 70.7 | 97.8 | 94.9 | 86.2 | 71.2 | 84.5 | 80.8 | 73.1 | 71.8 | 87.9 | 70.1 | 75.1 | 74.1 | 93 | 88.1 | 88.1 | 75 | 56.2 | 44.6 | 70.8 | 74.7 | 92.6 |
| Dew Point (C) | 9.7 | 11.7 | 13.7 | 12.6 | 9.9 | 8.1 | 11 | 13.5 | 15.4 | 12.8 | 14.3 | 16.1 | 14.1 | 14.2 | 13.5 | 12.5 | 9.6 | 13.5 | 14.5 | 13.2 | 12.9 | 15 | 14 | 11.3 | 10.6 | 4.2 | 2.3 | 9.3 | 12.7 | 13.1 |
| Pressure (mb) | 1016.7 | 1025.4 | 1023.2 | 1025.9 | 1027.1 | 1023.4 | 1021.6 | 1019.4 | 1019.5 | 1018.1 | 1021.0 | 1012.1 | 1007.7 | 1003.4 | 999.0 | 1000.3 | 1004.7 | 1005.9 | 1012.5 | 1009.2 | 1009.3 | 1004.3 | 1008.1 | 1006.9 | 996.2 | 1008.5 | 1005.7 | 1009.4 | 1004.4 | 1011.3 |
| Days with | ||||||||||||||||||||||||||||||
| thunder | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | 1 | _ | _ | _ | _ | 1 | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| hail<5mm | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| hail>/=5mm | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| snow | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| fog | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |
| gales | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ | _ |