The datasets available hereunder consist of daily rainfall totals (84 annual files), maximum (768 monthly files) and minimum (768 monthly files) air temperature point values on a 1x1km grid Irish Grid (TM65) covering the land of Ireland. Interpolation models were used to calculate the rainfall and temperature grid point values with model inputs from observations recorded at Met Éireann stations. For monthly, seasonal and annual gridded datasets, we recommend you use the grids on www.met.ie/monthly-rainfall-and-temperature-grids/. The climatological standard normals datasets are available at www.met.ie/climate/30-year-averages.
The daily rainfall grids 1941-1980 have been re-calculated using the same baseline dataset used in the generation of the 1981-2022 daily rainfall grids. The baseline is used to normailse the daily rainfall data making the interpolation process more robust. The previous dataset from 1941 to 1980 has been archived, the daily rainfall grids 1981-2022 remains as they were.
Daily rainfall totals are expressed in millimetres (mm) and are collated by year from 1941 to 2024. The daily rainfall total is presented without a decimal point. For example, a value of 123 is equivalent to a daily rainfall total of 12.3 mm. The number of stations available for rainfall gridding analysis varies each year, with 436 stations in 2020 to 519 stations in 2014. The average number of stations available over the past 10 years is around 497, while in 2024 there were up to 456 stations.
Daily air temperatures are given in degrees Celsius (°C) and are collated by month for each year from 1961 to 2024 with each file containing a month of data. Mean temperature values can be determined by calculating the average of the maximum and minimum temperature at a point, that is: Tmean = (Tmax+Tmin)/2. The number of stations available for temperature gridding analysis varies each year, from 48 stations in 1961 to 105 stations in 2004. The average number of stations available over the past 10 years is around 72, while in 2024 there were up to 51 stations.
Terms and Conditions
Met Éireann retains Intellectual Property Rights and copyright over our data. Any publication of raw or processed data must acknowledge Met Éireann as the source. We assume no liability for any error, omission, or damage arising from use of the data.