Casement 1981–2010 averages
TEMPERATURE (degrees Celsius)JanFebMarAprMayJunJulAugSepOctNovDecYear
mean daily max8.08.210.212.415.217.919.819.517.113.610.28.313.4
mean daily min2.12.03.34.16.69.411.511.39.57.04.22.46.1
mean temperature5.15.16.88.210.913.615.715.413.310.37.25.49.7
absolute max.15.215.917.322.724.927.631.029.525.421.317.714.831.0
min. maximum-3.0-0.72.34.57.110.210.611.710.85.2-3.1-4.7-4.7
max. minimum11.313.011.512.613.817.218.118.317.816.413.812.718.3
absolute min. -12.4-8.0-9.0-5.5-2.40.44.62.20.2-4.1-9.1-15.7-15.7
mean num. of days with air frost 7.57.74.63.40.80.00.00.00.01.34.37.637.2
mean num. of days with ground frost 14.014.011.011.04.00.00.00.01.04.09.014.082.0
mean 5cm soil3.73.65.38.412.615.717.116.012.89.26.04.29.6
mean 10cm soil3.93.85.27.611.414.616.215.312.69.26.24.49.2
mean 20cm soil4.64.55.98.111.514.516.315.813.410.17.15.19.7
RELATIVE HUMIDITY (%)
mean at 0900UTC87.286.784.580.177.477.779.782.284.586.388.988.483.6
mean at 1500UTC 82.276.771.867.767.367.968.969.071.876.681.684.173.8
SUNSHINE (hours)
mean daily duration 1.72.53.35.16.05.34.94.84.13.32.21.53.7
greatest daily duration 8.19.210.913.215.416.015.514.412.310.18.56.916.0
mean no. of days with no sun 8.95.84.42.51.82.11.61.12.44.57.09.952.0
RAINFALL (mm)
mean monthly total 63.848.550.751.959.162.554.272.360.381.673.775.7754.2
greatest daily total 30.032.231.138.729.897.533.789.351.150.182.046.897.5
mean num. of days with >= 0.2mm 171416141514151614161616183
mean num. of days with >= 1.0mm 121011101110101110121112130
mean num. of days with >= 5.0mm 43333334444543
WIND (knots)
mean monthly speed 13.612.912.49.89.18.68.89.09.611.111.612.310.7
max. gust 80787159635158555965668282
max. mean 10-minute speed 57544743433639363844465757
mean num. of days with gales 4.53.22.10.60.40.10.10.20.31.21.93.518.1
WEATHER (mean no. of days with..)
snow or sleet 4.13.92.51.10.10.00.00.00.00.00.52.314.6
snow lying at 0900UTC1.81.00.20.10.00.00.00.00.00.00.11.04.1
hail 1.01.52.72.41.50.20.20.10.20.20.70.611.3
thunder 0.10.10.30.41.11.01.01.20.60.40.10.16.3
fog1.81.91.61.61.51.21.12.02.82.02.12.422.1