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| Cork Airport 1961-1990 averages | | | | | | | | | | | | | |
| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max. | 7.6 | 7.5 | 9.3 | 11.3 | 13.8 | 16.6 | 18.5 | 18.2 | 16.0 | 13.1 | 9.9 | 8.5 | 12.5 |
| mean daily min. | 2.6 | 2.5 | 3.1 | 4.2 | 6.5 | 9.2 | 11.1 | 10.9 | 9.4 | 7.5 | 4.5 | 3.7 | 6.3 |
| mean | 5.1 | 5.0 | 6.2 | 7.7 | 10.2 | 12.9 | 14.8 | 14.5 | 12.7 | 10.3 | 7.2 | 6.1 | 9.4 |
| absolute max. | 12.6 | 13.5 | 15.5 | 20.5 | 23.6 | 25.7 | 28.7 | 27.5 | 24.7 | 19.0 | 15.9 | 13.6 | 28.7 |
| absolute min. | -8.5 | -8.6 | -6.1 | -2.4 | -0.9 | 2.4 | 4.8 | 4.9 | 2.3 | -0.4 | -3.3 | -5.9 | -8.6 |
| mean no. of days with air frost | 6.7 | 5.6 | 3.4 | 1.8 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 2.4 | 3.9 | 24.0 |
| mean no. of days with ground frost | 15.0 | 12.7 | 12.0 | 9.4 | 2.9 | 0.2 | 0.0 | 0.0 | 0.4 | 2.6 | 9.5 | 12.2 | 76.8 |
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| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 90 | 90 | 88 | 83 | 81 | 81 | 83 | 86 | 88 | 91 | 90 | 90 | 87 |
| mean at 1500UTC | 84 | 80 | 75 | 71 | 71 | 72 | 72 | 73 | 76 | 82 | 83 | 86 | 77 |
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| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.70 | 2.28 | 3.51 | 5.21 | 6.02 | 5.73 | 5.40 | 5.14 | 4.13 | 2.80 | 2.16 | 1.56 | 3.80 |
| greatest daily duration | 7.3 | 9.3 | 11.8 | 13.8 | 15.4 | 15.9 | 15.4 | 14.2 | 12.8 | 9.9 | 8.5 | 6.7 | 15.9 |
| mean no. of days with no sun | 11 | 9 | 6 | 4 | 2 | 3 | 2 | 2 | 4 | 7 | 9 | 12 | 69 |
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| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 138.3 | 115.6 | 98.7 | 67.7 | 83.4 | 68.8 | 66.4 | 88.7 | 96.4 | 125.4 | 111.1 | 133.8 | 1194.4 |
| greatest daily total | 55.1 | 48.2 | 39.3 | 44.9 | 49.3 | 43.3 | 83.8 | 64.8 | 51.8 | 86.7 | 69.9 | 52.2 | 86.7 |
| mean no. of days with >= 0.2mm | 20 | 17 | 18 | 14 | 16 | 15 | 14 | 16 | 16 | 19 | 19 | 20 | 204 |
| mean no. of days with >= 1.0mm | 16 | 13 | 13 | 10 | 12 | 10 | 9 | 11 | 12 | 15 | 14 | 16 | 151 |
| mean no. of days with >= 5.0mm | 9 | 8 | 6 | 4 | 6 | 5 | 4 | 5 | 6 | 8 | 7 | 8 | 75 |
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| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 12.9 | 12.6 | 12.3 | 11.0 | 10.6 | 9.5 | 9.1 | 9.2 | 10.3 | 11.2 | 11.6 | 12.4 | 11.1 |
| max. gust | 94 | 83 | 70 | 63 | 60 | 51 | 57 | 54 | 64 | 75 | 66 | 68 | 94 |
| max. mean 10-minute speed | 58 | 54 | 44 | 41 | 41 | 36 | 40 | 38 | 45 | 48 | 46 | 46 | 58 |
| mean no. of days with gales | 3.2 | 2.2 | 1.7 | 0.7 | 0.4 | 0.1 | 0.1 | 0.2 | 0.7 | 1.2 | 1.8 | 2.5 | 15.0 |
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| WEATHER (mean no. of days with...) | | | | | | | | | | | | | |
| snow or sleet | 4.5 | 4.7 | 3.0 | 1.1 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 2.3 | 16.4 |
| snow lying at 0900UTC | 2.7 | 1.8 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.6 | 5.6 |
| hail | 1.0 | 1.1 | 1.9 | 1.9 | 1.1 | 0.3 | 0.1 | 0.1 | 0.1 | 0.4 | 0.3 | 0.6 | 8.8 |
| thunder | 0.4 | 0.1 | 0.1 | 0.2 | 0.4 | 0.5 | 0.8 | 0.5 | 0.2 | 0.4 | 0.1 | 0.1 | 3.7 |
| fog | 7.4 | 7.3 | 7.9 | 5.9 | 7.7 | 8.6 | 8.5 | 9.8 | 10.7 | 10.4 | 7.3 | 8.0 | 99.5 |