Birr 1979-2008 averages
TEMPERATURE (degrees Celsius)JanFebMarAprMayJunJulAugSepOctNovDecYear
mean daily max8.18.610.312.615.517.819.619.317.113.610.48.613.5
mean daily min2.
mean temperature5.
absolute max.14.315.518.623.225.729.730.829.425.620.417.515.330.8
min. maximum-3.5-
max. minimum11.612.
absolute min. -14.6-7.1-7.8-4.7-
mean num. of days with air frost
mean num. of days with ground frost
mean 5cm soil3.
mean 10cm soil4.
mean 20cm soil4.
mean at 0900UTC89.888.986.981.577.778.380.984.286.689.190.990.385.4
mean at 1500UTC 82.475.671.665.164.766.267.568.570.376.181.184.572.8
SUNSHINE (hours)
mean daily duration
greatest daily duration 7.79.410.513.015.115.715.213.611.
mean num. of days with no sun
mean monthly total 78.858.667.455.059.566.559.481.666.494.274.783.8845.7
greatest daily total
mean num. of days with >= 0.2mm 191519151616161817191818206
mean num. of days with >= 1.0mm 141114111211111211141313147
mean num. of days with >= 5.0mm 54434435465653
WIND (knots)
mean monthly speed
max. gust 75776458554949465164546959.2
max. mean 10-minute speed 40383329292724273037323832
mean num. of days with gales
WEATHER (mean no. of days with..)
snow or sleet
snow lying at 0900UTC2.