Page last updated: Tuesday, 28th June 2024 at 17 hours
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The datasets available hereunder consist of daily rainfall totals (83 annual files), maximum (756 monthly files) and minimum (756 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 The previous dataset from 1941 to 1980 has been archived, the daily rainfall grids 1981-2022 remains as they were.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 2023. 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, from 436 stations in 2020 to 519 stations in 2014. The average number of stations available each year was around 488. While in 2022 there were up to 481 stations.
Example for daily rainfall 2023: IRL_DLY_RR_2023_grid.csv.gz
Click to access rainfall datasets
Daily air temperatures are given in degrees Celsius (°C) and are collated by month for each year from 1961 to 2023 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 each year was around 84. While in 2022 there were up to 58 stations.
Example for maximum temperatures December 2023:
IRL_DLY_TX_202312_grid_IDW_09Z.csv.gz
Click to access maximum temperature datasets
Example for minimum temperatures December 2023:
IRL_DLY_TN_202312_grid_IDW_09Z.csv.gz
Click to access minimum temperature datasets
Terms and Conditions
Met Éireann retains Intellectual Property Rights and copyright over our data. If data are published in raw or processed format Met Éireann must be acknowledged as the source. Met Éireann does not accept any liability whatsoever for any error or omission in the data series, their availability, or for any loss or damage arising from their use.