Roches Point1961-1990 averages
TEMPERATURE (degrees Celsius)JanFebMarAprMayJunJulAugSepOctNovDecYear
mean daily max.8.58.39.611.413.716.418.218.116.213.710.79.312.8
mean daily min.4.14.14.55.67.810.312.012.010.78.96.05.17.6
mean6.36.27.18.510.713.415.115.113.511.38.37.210.2
absolute max.13.514.014.920.121.525.327.526.523.319.116.414.427.5
absolute min.-7.2-5.1-3.4-0.30.83.47.26.84.71.9-0.9-3.7-7.2
mean no. of days with air frost2.52.00.90.10.00.00.00.00.00.00.21.37.0
mean no. of days with ground frost10.27.36.65.11.20.10.00.00.10.95.28.044.6
RELATIVE HUMIDITY (%)
mean at 0900UTC87868581818283848788878885
mean at 1500UTC82807674767777777881818379
SUNSHINE (hours)
mean daily duration1.792.313.505.276.185.925.575.214.272.872.341.663.91
greatest daily duration8.39.211.613.715.115.815.414.412.89.98.77.115.8
mean no. of days with no sun1086322123691163
RAINFALL (mm)
mean monthly total104.486.777.354.763.953.953.179.978.894.987.8100.4935.7
greatest daily total47.040.238.437.535.544.546.984.450.954.846.158.184.4
mean no. of days with >= 0.2mm191616131513111415171717184
mean no. of days with >= 1.0mm1513111011981110121213135
mean no. of days with >= 5.0mm76544335566763
WIND (knots)
mean monthly speed14.614.013.411.811.510.39.910.311.212.713.014.112.2
max. gust86827671585357607583757886
max. mean 10-minute speed62565253434140425254495362
mean no. of days with gales64.44.21.81.50.30.50.91.83.13.55.333.3
WEATHER (mean no. of days with...)
snow or sleet2.63.01.30.30.10.00.00.00.00.00.21.18.7
snow lying at 0900UTC0.50.60.10.00.00.00.00.00.00.00.00.11.3
hail1.01.02.41.60.80.10.00.10.00.20.30.48.0
thunder0.20.30.10.10.50.70.80.60.40.30.10.14.2
fog2.92.43.63.74.25.14.95.14.94.32.82.746.5