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| Claremorris 1961-1990 averages | | | | | | | | | | | | | |
| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max. | 7.2 | 7.6 | 9.6 | 12.0 | 14.5 | 17.0 | 18.4 | 18.2 | 16.1 | 13.2 | 9.5 | 7.9 | 12.6 |
| mean daily min. | 1.4 | 1.3 | 2.3 | 3.3 | 5.5 | 8.2 | 10.2 | 9.8 | 8.1 | 6.3 | 3.0 | 2.3 | 5.1 |
| mean | 4.3 | 4.5 | 5.9 | 7.6 | 10.0 | 12.6 | 14.3 | 14.0 | 12.1 | 9.8 | 6.2 | 5.1 | 8.9 |
| absolute max. | 13.1 | 13.3 | 20.1 | 22.3 | 25.1 | 29.8 | 30.5 | 27.2 | 23.3 | 19.9 | 15.4 | 14.3 | 30.5 |
| absolute min. | -11.7 | -17.1 | -8.0 | -5.5 | -3.1 | -0.4 | 0.6 | 1.1 | -1.2 | -4.0 | -5.3 | -8.3 | -17.1 |
| mean no. of days with air frost | 9.7 | 8.9 | 6.8 | 3.9 | 0.8 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 6.1 | 8.3 | 45.6 |
| mean no. of days with ground frost | 16.0 | 14.9 | 13.2 | 11.5 | 5.9 | 1.0 | 0.2 | 0.3 | 2.0 | 4.4 | 13.1 | 14.5 | 97.0 |
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| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 91 | 91 | 88 | 84 | 80 | 81 | 84 | 87 | 89 | 92 | 92 | 92 | 88 |
| mean at 1500UTC | 86 | 79 | 74 | 69 | 68 | 72 | 73 | 75 | 77 | 81 | 85 | 88 | 77 |
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| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.45 | 2.11 | 2.87 | 4.40 | 5.08 | 4.64 | 3.79 | 3.81 | 3.10 | 2.39 | 1.81 | 1.11 | 3.05 |
| greatest daily duration | 7.8 | 9.2 | 11.7 | 13.7 | 15.1 | 15.6 | 14.8 | 13.7 | 12.3 | 10.1 | 8.6 | 7.0 | 15.6 |
| mean no. of days with no sun | 11 | 8 | 6 | 3 | 2 | 2 | 3 | 3 | 4 | 6 | 9 | 12 | 69 |
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| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 120.8 | 83.2 | 95.5 | 62.3 | 77.9 | 71.1 | 63.8 | 96.6 | 104.3 | 124.6 | 118.8 | 124.1 | 1143.2 |
| greatest daily total | 33.1 | 27.9 | 27.5 | 19.8 | 42.0 | 74.6 | 38.8 | 55.0 | 41.6 | 59.5 | 49.2 | 41.0 | 74.6 |
| mean no. of days with >= 0.2mm | 22 | 17 | 21 | 17 | 18 | 16 | 17 | 19 | 19 | 22 | 21 | 22 | 230 |
| mean no. of days with >= 1.0mm | 18 | 14 | 17 | 12 | 14 | 12 | 11 | 14 | 15 | 17 | 17 | 17 | 178 |
| mean no. of days with >= 5.0mm | 9 | 6 | 7 | 4 | 6 | 4 | 4 | 6 | 7 | 8 | 8 | 8 | 78 |
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| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 10.0 | 10.0 | 10.2 | 8.7 | 8.3 | 7.9 | 7.5 | 7.3 | 8.0 | 9.0 | 8.7 | 9.7 | 8.8 |
| max. gust | 96 | 85 | 74 | 57 | 62 | 54 | 66 | 54 | 91 | 70 | 70 | 79 | 96 |
| max. mean 10-minute speed | 59 | 48 | 45 | 36 | 41 | 36 | 39 | 33 | 60 | 46 | 40 | 51 | 60 |
| mean no. of days with gales | 1.2 | 0.9 | 1.0 | 0.1 | 0.1 | 0.1 | 0.0 | 0.0 | 0.2 | 0.4 | 0.5 | 0.7 | 5.2 |
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| WEATHER (mean no. of days with...) | | | | | | | | | | | | | |
| snow or sleet | 6.5 | 5.4 | 4.7 | 1.9 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 1.7 | 3.5 | 24.1 |
| snow lying at 0900UTC | 2.6 | 1.4 | 0.7 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 1.1 | 6.3 |
| hail | 4.2 | 3.3 | 5.7 | 3.6 | 1.9 | 0.4 | 0.0 | 0.0 | 0.7 | 1.0 | 3.0 | 2.7 | 26.5 |
| thunder | 0.4 | 0.2 | 0.2 | 0.3 | 0.5 | 0.9 | 0.9 | 0.4 | 0.2 | 0.4 | 0.3 | 0.5 | 5.1 |
| fog | 4.4 | 2.7 | 1.9 | 2.4 | 1.7 | 2.3 | 2.3 | 4.1 | 4.1 | 4.6 | 3.6 | 3.7 | 37.9 |