Shannon Airport 1961-1990 averages
TEMPERATURE (degrees Celsius)JanFebMarAprMayJunJulAugSepOctNovDecYear
mean daily max.8.28.510.512.715.317.919.419.217.214.210.48.913.5
mean daily min.2.62.73.64.87.310.112.011.710.18.04.53.66.8
mean5.45.67.08.811.314.015.715.513.611.17.56.310.1
absolute max.14.014.820.222.225.631.630.628.725.521.818.215.231.6
absolute min.-11.2-9.8-7.8-4.1-0.91.55.22.91.3-1.4-6.1-8.3-11.2
mean no. of days with air frost6.55.43.21.60.00.00.00.00.00.33.55.025.4
mean no. of days with ground frost13.211.09.58.22.50.40.00.00.62.79.611.068.6
RELATIVE HUMIDITY (%)
mean at 0900UTC88878581777981838588888984
mean at 1500UTC82757065646768697177818473
SUNSHINE (hours)
mean daily duration1.582.343.344.935.775.134.594.443.692.651.931.423.48
greatest daily duration7.89.511.613.615.315.815.714.811.69.98.87.115.8
mean no. of days with no sun1075322223681162
RAINFALL (mm)
mean monthly total97.272.171.855.560.162.457.182.381.892.494.799.6926.8
greatest daily total29.033.528.529.627.029.742.535.935.533.033.050.450.4
mean no. of days with >= 0.2mm201619161716151818201920214
mean no. of days with >= 1.0mm161214111311101313151516160
mean no. of days with >= 5.0mm75544445667766
WIND (knots)
mean monthly speed10.911.111.09.59.58.98.78.69.610.09.610.59.8
max. gust82806562615752559384648193
max. mean 10-minute speed55534441394233396057455160
mean no. of days with gales2.11.21.40.50.50.10.00.10.60.91.01.59.8
WEATHER (mean no. of days with...)
snow or sleet3.43.21.80.60.10.00.00.00.00.10.31.510.9
snow lying at 0900UTC0.80.70.10.00.00.00.00.00.00.00.10.32.0
hail3.73.14.32.51.70.20.10.20.31.11.82.721.7
thunder0.90.50.40.30.40.80.80.50.40.40.40.46.3
fog4.12.01.82.21.71.81.73.13.03.33.43.631.8