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| Malin Head 1981–2010 averages
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| TEMPERATURE (degrees Celsius) | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| mean daily max | 8.1 | 8.1 | 9.3 | 10.8 | 13.1 | 15.1 | 16.8 | 17.0 | 15.6 | 13.0 | 10.4 | 8.6 | 12.2 |
| mean daily min | 3.6 | 3.5 | 4.4 | 5.8 | 7.8 | 10.3 | 12.1 | 12.3 | 10.9 | 8.5 | 6.1 | 4.2 | 7.5 |
| mean temperature | 5.9 | 5.8 | 6.9 | 8.3 | 10.5 | 12.7 | 14.5 | 14.7 | 13.3 | 10.8 | 8.2 | 6.4 | 9.8 |
| absolute max. | 14.4 | 14.5 | 15.9 | 20.7 | 22.4 | 24.6 | 25.9 | 25.9 | 23.4 | 20.6 | 17.6 | 15.1 | 25.9 |
| min. maximum | -1.0 | 1.0 | 2.2 | 4.5 | 6.8 | 10.3 | 10.2 | 11.9 | 10.6 | 6.4 | 4.4 | 0.4 | -1.0 |
| max. minimum | 10.5 | 11.8 | 10.4 | 12.9 | 14.2 | 15.1 | 17.4 | 17.4 | 16.8 | 16.5 | 13.6 | 12.2 | 17.4 |
| absolute min. | -5.6 | -6.2 | -4.4 | -1.5 | 0.7 | 2.6 | 6.5 | 6.4 | 4.0 | 0.4 | -1.2 | -4.8 | -6.2 |
| mean num. of days with air frost | 2.4 | 2.1 | 1.0 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.3 | 2.0 | 8.0 |
| mean num. of days with ground frost | 8.0 | 7.1 | 5.2 | 2.9 | 0.6 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 2.6 | 6.9 | 33.6 |
| mean 5cm soil | 4.1 | 3.9 | 5.4 | 8.2 | 12.0 | 14.6 | 15.8 | 15.0 | 12.4 | 9.2 | 6.6 | 4.8 | 9.3 |
| mean 10cm soil | 4.6 | 4.5 | 5.7 | 8.0 | 11.3 | 14.0 | 15.2 | 14.7 | 12.5 | 9.7 | 7.1 | 5.3 | 9.4 |
| mean 20cm soil | 5.3 | 5.2 | 6.3 | 8.4 | 11.4 | 13.9 | 15.3 | 15.1 | 13.2 | 10.5 | 8.0 | 6.1 | 9.9 |
| RELATIVE HUMIDITY (%) | | | | | | | | | | | | | |
| mean at 0900UTC | 83.2 | 82.1 | 81.6 | 79.6 | 79.1 | 81.5 | 84.1 | 83.4 | 82.5 | 83.0 | 82.8 | 82.8 | 82.1 |
| mean at 1500UTC | 80.8 | 77.0 | 77.1 | 75.7 | 75.7 | 78.7 | 80.6 | 79.8 | 77.5 | 77.6 | 79.7 | 81.3 | 78.5 |
| SUNSHINE (hours) | | | | | | | | | | | | | |
| mean daily duration | 1.2 | 2.3 | 3.0 | 5.1 | 6.5 | 5.5 | 4.6 | 4.4 | 3.7 | 2.6 | 1.5 | 1.1 | 3.5 |
| greatest daily duration | 7.6 | 8.7 | 11.6 | 13.6 | 15.5 | 16.0 | 15.6 | 14.6 | 12.2 | 9.4 | 7.3 | 6.7 | 16.0 |
| mean num. of days with no sun | 10.6 | 5.8 | 5.5 | 3.3 | 2.3 | 2.4 | 2.7 | 3.1 | 3.5 | 6.0 | 8.3 | 11.6 | 65.1 |
| RAINFALL (mm) | | | | | | | | | | | | | |
| mean monthly total | 117.4 | 84.8 | 85.9 | 63.1 | 56.9 | 69.1 | 76.8 | 93.2 | 91.8 | 118.4 | 104.5 | 114.2 | 1076.0 |
| greatest daily total | 32.6 | 34.3 | 31.4 | 26.3 | 35.0 | 26.7 | 38.7 | 49.9 | 48.6 | 60.0 | 31.6 | 39.6 | 60.0 |
| mean num. of days with >= 0.2mm | 22 | 18 | 20 | 16 | 16 | 16 | 18 | 19 | 19 | 21 | 21 | 20 | 226 |
| mean num. of days with >= 1.0mm | 18 | 13 | 15 | 12 | 11 | 11 | 14 | 14 | 14 | 17 | 17 | 16 | 172 |
| mean num. of days with >= 5.0mm | 8 | 6 | 6 | 4 | 3 | 4 | 5 | 6 | 6 | 8 | 7 | 7 | 70 |
| WIND (knots) | | | | | | | | | | | | | |
| mean monthly speed | 19.0 | 18.6 | 17.3 | 14.6 | 13.3 | 12.8 | 12.3 | 12.8 | 14.6 | 16.8 | 17.6 | 17.5 | 15.6 |
| max. gust | 91 | 86 | 90 | 71 | 68 | 62 | 74 | 62 | 85 | 78 | 92 | 96 | 96 |
| max. mean 10-minute speed | 65 | 57 | 67 | 52 | 49 | 42 | 55 | 44 | 61 | 57 | 61 | 67 | 67 |
| mean num. of days with gales | 11.8 | 10.3 | 8.7 | 3.6 | 2.1 | 1.0 | 0.7 | 1.1 | 3.0 | 6.5 | 8.0 | 8.5 | 65.3 |
| WEATHER (mean no. of days with..) | | | | | | | | | | | | | |
| snow or sleet | 5.1 | 5.2 | 3.4 | 1.6 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 3.8 | 20.4 |
| snow lying at 0900UTC | 0.4 | 0.4 | 0.4 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 2.3 |
| hail | 9.2 | 7.4 | 7.6 | 4.4 | 1.7 | 0.3 | 0.1 | 0.2 | 0.6 | 3.1 | 5.8 | 7.3 | 47.7 |
| thunder | 0.7 | 0.6 | 0.3 | 0.2 | 0.4 | 0.7 | 0.8 | 0.6 | 0.3 | 0.5 | 0.5 | 0.6 | 6.1 |
| fog | 0.4 | 0.4 | 0.8 | 1.3 | 1.7 | 1.6 | 1.6 | 1.2 | 0.6 | 0.1 | 0.4 | 0.3 | 10.5 |