Casement 1971–2000 averages
TEMPERATURE (degrees Celsius)JanFebMarAprMayJunJulAugSepOctNovDecYear
mean daily max7.88.19.911.914.817.519.719.416.913.510.08.513.2
mean daily min2.
mean temperature4.
absolute max.15.415.918.121.324.727.629.830.525.421.317.715.430.5
min. maximum-3.0-
max. minimum11.313.011.312.313.816.917.818.317.816.413.812.718.3
absolute min. -12.4-8.0-7.8-5.5-
mean num. of days with air frost
mean num. of days with ground frost
mean 5cm soil3.
mean 10cm soil3.
mean 20cm soil4.
mean at 0900UTC86.685.683.980.277.177.979.281.384.186.087.687.383.1
mean at 1500UTC 81.777.171.868.067.568.168.268.771.476.481.083.473.6
SUNSHINE (hours)
mean daily duration
greatest daily duration
mean num. of days with no sun
mean monthly total 67.849.751.751.555.958.548.165.963.169.466.276.0723.9
greatest daily total
mean num. of days with >= 0.2mm 181517141515141515161616186
mean num. of days with >= 1.0mm 13111110101091010121112129
mean num. of days with >= 5.0mm 43333324444542
WIND (knots)
mean monthly speed
max. gust 80787159635358556965688282
max. mean 10-minute speed 57544743433639364644495757
mean num. of days with gales
WEATHER (mean no. of days with..)
snow or sleet
snow lying at 0900UTC2.